67 results on '"Christine Schaeffer-Reiss"'
Search Results
2. Comparative Study of Secreted Proteins, Enzymatic Activities of Wood Degradation and Stilbene Metabolization in Grapevine Botryosphaeria Dieback Fungi
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Clément Labois, Elodie Stempien, Justine Schneider, Christine Schaeffer-Reiss, Christophe Bertsch, Mary-Lorène Goddard, and Julie Chong
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Botryosphaeriaceae ,grapevine ,stilbene metabolization ,secreted proteins ,Biology (General) ,QH301-705.5 - Abstract
Botryosphaeriaceae fungi are plant pathogens associated with Botryosphaeria dieback. To better understand the virulence factors of these fungi, we investigated the diversity of secreted proteins and extracellular enzyme activities involved in wood degradation and stilbene metabolization in Neofusicoccum parvum and Diplodia seriata, which are two major fungi associated with grapevine B. dieback. Regarding the analysis of proteins secreted by the two fungi, our study revealed that N. parvum, known to be more aggressive than D. seriata, was characterized by a higher quantity and diversity of secreted proteins, especially hydrolases and oxidoreductases that are likely involved in cell wall and lignin degradation. In addition, when fungi were grown with wood powder, the extracellular laccase and Mn peroxidase enzyme activities were significantly higher in D. seriata compared to N.parvum. Importantly, our work also showed that secreted Botryosphaeriaceae proteins produced after grapevine wood addition are able to rapidly metabolize the grapevine stilbenes. Overall, a higher diversity of resveratrol and piceatannol metabolization products was found with enzymes of N. parvum compared to D. seriata. This study emphasizes the diversity of secreted virulence factors found in B. dieback fungi and suggests that some resveratrol oligomers produced in grapevine wood after pathogen attack could be formed via pathogenic fungal oxidases.
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- 2021
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3. Unconventional endosome-like compartment and retromer complex in Toxoplasma gondii govern parasite integrity and host infection
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Lamba Omar Sangaré, Tchilabalo Dilezitoko Alayi, Benoit Westermann, Agnes Hovasse, Fabien Sindikubwabo, Isabelle Callebaut, Elisabeth Werkmeister, Frank Lafont, Christian Slomianny, Mohamed-Ali Hakimi, Alain Van Dorsselaer, Christine Schaeffer-Reiss, and Stanislas Tomavo
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Science - Abstract
The retromer complex is a multi-protein component of the endosomal protein sorting machinery. Here, Sangaré et al. identify unique features in the retromer complex of the parasite Toxoplasma gondii, and show that it is crucial for the biogenesis of secretory organelles in this pathogen.
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- 2016
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4. Flowering as the Most Highly Sensitive Period of Grapevine (Vitis vinifera L. cv Mourvèdre) to the Botryosphaeria Dieback Agents Neofusicoccum parvum and Diplodia seriata Infection
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Alessandro Spagnolo, Philippe Larignon, Maryline Magnin-Robert, Agnès Hovasse, Clara Cilindre, Alain Van Dorsselaer, Christophe Clément, Christine Schaeffer-Reiss, and Florence Fontaine
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Botryosphaeria dieback ,Neofusicoccum parvum ,Diplodia seriata ,plant proteomics ,two dimensional gel electrophoresis ,defense-related proteins ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Botryosphaeria dieback is a fungal grapevine trunk disease that currently represents a threat for viticulture worldwide because of the important economical losses due to reduced yield of affected plants and their premature death. Neofusicoccum parvum and Diplodia seriata are among the causal agents. Vine green stems were artificially infected with N. parvum or D. seriata at the onset of three different phenological stages (G stage (separated clusters), flowering and veraison). Highest mean lesion lengths were recorded at flowering. Major proteome changes associated to artificial infections during the three different phenological stages were also reported using two dimensional gel electrophoresis (2D)-based analysis. Twenty (G stage), 15 (flowering) and 13 (veraison) differentially expressed protein spots were subjected to nanoLC-MS/MS and a total of 247, 54 and 25 proteins were respectively identified. At flowering, a weaker response to the infection was likely activated as compared to the other stages, and some defense-related proteins were even down regulated (e.g., superoxide dismutase, major latex-like protein, and pathogenesis related protein 10). Globally, the flowering period seemed to represent the period of highest sensitivity of grapevine to Botryosphaeria dieback agent infection, possibly being related to the high metabolic activity in the inflorescences.
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- 2014
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5. Proteomic insights into changes in grapevine wood in response to esca proper and apoplexy
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Maryline MAGNIN-ROBERT, Alessandro SPAGNOLO, Tchilabalo DILEZITOKO ALAYI, Clara CILINDRE, Laurence MERCIER, Christine SCHAEFFER-REISS, Alain VAN DORSSELAER, Christophe CLÉMENT, and Florence FONTAINE
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grapevine ,proteomics ,qRT-PCR ,trunk diseases ,Botany ,QK1-989 - Abstract
Among fungal grapevine trunk diseases, esca proper poses a significant threat for viticulture. Apoplexy, mainly occurring on grapevines affected by esca proper, is also a threat. To verify if different responses are activated in the woody tissues of apoplectic (A) and esca proper-affected (E) vines, two-dimensional gel electrophoresis coupled to mass spectrometry analysis was used to examine changes in the trunk wood of E and A field-grown plants. Asymptomatic and black streaked trunk (BST) wood from A and E plants were compared to asymptomatic and BST wood of control plants. Twenty-seven differentially expressed protein spots were identified. For eleven targeted proteins, expression of the relative transcripts was also monitored by qRT-PCR. Hierarchical tree clustering revealed differences in the distribution of spots containing carbohydrate metabolism proteins and heat shock proteins between asymptomatic- and BST-wood of grapevine, irrespective of the type of plant examined (control or diseased grapevines). Asymptomatic wood was mainly characterized by down-expression of proteins involved in cell growth and defense responses. The proteome of BST wood, characterized by extensive presence of grapevine trunk disease agents, revealed over-expression of proteins involved in defense. There was no evidence of strong different response in the trunk wood of apoplectic and esca proper affected plants. This could mean that, despite the different feature of these external crown symptoms, grapevine responses at trunk wood level is very similar in both cases. This plant response might therefore either simply be due to the fact that plants can react in the same way to different stresses, or that apoplexy represents a different effect provoked by the same cause or causal agent(s).
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- 2014
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6. The Pollen Coat Proteome: At the Cutting Edge of Plant Reproduction
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Juan David Rejón, François Delalande, Christine Schaeffer-Reiss, Juan de Dios Alché, María Isabel Rodríguez-García, Alain Van Dorsselaer, and Antonio Jesús Castro
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olive ,pollen coat ,proteomics ,self-incompatibility ,tapetum ,Microbiology ,QR1-502 - Abstract
The tapetum is a single layer of secretory cells which encloses the anther locule and sustains pollen development and maturation. Upon apoptosis, the remnants of the tapetal cells, consisting mostly of lipids and proteins, fill the pits of the sculpted exine to form the bulk of the pollen coat. This extracellular matrix forms an impermeable barrier that protects the male gametophyte from water loss and UV light. It also aids pollen adhesion and hydration and retains small signaling compounds involved in pollen–stigma communication. In this study, we have updated the list of the pollen coat’s protein components and also discussed their functions in the context of sexual reproduction
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- 2016
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7. Detection of prion protein in urine-derived injectable fertility products by a targeted proteomic approach.
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Alain Van Dorsselaer, Christine Carapito, François Delalande, Christine Schaeffer-Reiss, Daniele Thierse, Hélène Diemer, Douglas S McNair, Daniel Krewski, and Neil R Cashman
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Medicine ,Science - Abstract
BackgroundIatrogenic transmission of human prion disease can occur through medical or surgical procedures, including injection of hormones such as gonadotropins extracted from cadaver pituitaries. Annually, more than 300,000 women in the United States and Canada are prescribed urine-derived gonadotropins for infertility. Although menopausal urine donors are screened for symptomatic neurological disease, incubation of Creutzfeldt-Jakob disease (CJD) is impossible to exclude by non-invasive testing. Risk of carrier status of variant CJD (vCJD), a disease associated with decades-long peripheral incubation, is estimated to be on the order of 100 per million population in the United Kingdom. Studies showing infectious prions in the urine of experimental animals with and without renal disease suggest that prions could be present in asymptomatic urine donors. Several human fertility products are derived from donated urine; recently prion protein has been detected in preparations of human menopausal gonadotropin (hMG).Methodology/principal findingsUsing a classical proteomic approach, 33 and 34 non-gonadotropin proteins were identified in urinary human chorionic gonadotropin (u-hCG) and highly-purified urinary human menopausal gonadotropin (hMG-HP) products, respectively. Prion protein was identified as a major contaminant in u-hCG preparations for the first time. An advanced prion protein targeted proteomic approach was subsequently used to conduct a survey of gonadotropin products; this approach detected human prion protein peptides in urine-derived injectable fertility products containing hCG, hMG and hMG-HP, but not in recombinant products.Conclusions/significanceThe presence of protease-sensitive prion protein in urinary-derived injectable fertility products containing hCG, hMG, and hMG-HP suggests that prions may co-purify in these products. Intramuscular injection is a relatively efficient route of transmission of human prion disease, and young women exposed to prions can be expected to survive an incubation period associated with a minimal inoculum. The risks of urine-derived fertility products could now outweigh their benefits, particularly considering the availability of recombinant products.
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- 2011
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8. A novel Toxoplasma gondii nuclear factor TgNF3 is a dynamic chromatin-associated component, modulator of nucleolar architecture and parasite virulence.
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Alejandro Olguin-Lamas, Edwige Madec, Agnes Hovasse, Elisabeth Werkmeister, Isabelle Callebaut, Christian Slomianny, Stephane Delhaye, Thomas Mouveaux, Christine Schaeffer-Reiss, Alain Van Dorsselaer, and Stanislas Tomavo
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Immunologic diseases. Allergy ,RC581-607 ,Biology (General) ,QH301-705.5 - Abstract
In Toxoplasma gondii, cis-acting elements present in promoter sequences of genes that are stage-specifically regulated have been described. However, the nuclear factors that bind to these cis-acting elements and regulate promoter activities have not been identified. In the present study, we performed affinity purification, followed by proteomic analysis, to identify nuclear factors that bind to a stage-specific promoter in T. gondii. This led to the identification of several nuclear factors in T. gondii including a novel factor, designated herein as TgNF3. The N-terminal domain of TgNF3 shares similarities with the N-terminus of yeast nuclear FK506-binding protein (FKBP), known as a histone chaperone regulating gene silencing. Using anti-TgNF3 antibodies, HA-FLAG and YFP-tagged TgNF3, we show that TgNF3 is predominantly a parasite nucleolar, chromatin-associated protein that binds specifically to T. gondii gene promoters in vivo. Genome-wide analysis using chromatin immunoprecipitation followed by high-throughput sequencing (ChIP-seq) identified promoter occupancies by TgNF3. In addition, TgNF3 has a direct role in transcriptional control of genes involved in parasite metabolism, transcription and translation. The ectopic expression of TgNF3 in the tachyzoites revealed dynamic changes in the size of the nucleolus, leading to a severe attenuation of virulence in vivo. We demonstrate that TgNF3 physically interacts with H3, H4 and H2A/H2B assembled into bona fide core and nucleosome-associated histones. Furthermore, TgNF3 interacts specifically to histones in the context of stage-specific gene silencing of a promoter that lacks active epigenetic acetylated histone marks. In contrast to virulent tachyzoites, which express the majority of TgNF3 in the nucleolus, the protein is exclusively located in the cytoplasm of the avirulent bradyzoites. We propose a model where TgNF3 acts essentially to coordinate nucleolus and nuclear functions by modulating nucleosome activities during the intracellular proliferation of the virulent tachyzoites of T. gondii.
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- 2011
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9. Surface charge influences protein corona, cell uptake and biological effects of carbon dots
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Yasmin Arezki, François Delalande, Christine Schaeffer-Reiss, Sarah Cianférani, Mickaël Rapp, Luc Lebeau, Françoise Pons, and Carole Ronzani
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Proteomics ,Surface Properties ,Aucun ,Carbon ,Citric Acid ,Albumins ,Nanoparticles ,Protein Corona ,General Materials Science ,Adiponectin ,Vitronectin ,Amines ,Apolipoproteins C ,Fetuins ,Apolipoproteins B - Abstract
Carbon dots are emerging nanoparticles (NPs) with tremendous applications, especially in the biomedical field. Herein is reported the first quantitative proteomic analysis of the protein corona formed on CDs with different surface charge properties. Four CDs were synthesized from citric acid and various amine group-containing passivation reagents, resulting in cationic NPs with increasing zeta (ζ)-potential and density of positive charges. After CD contact with serum, we show that protein corona identity is influenced by CD surface charge properties, which in turn impacts CD uptake and viability loss in macrophages. In particular, CDs with high ζ-potential (+30 mV) and charge density (2 μmol mg
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- 2022
10. Differential Phosphoproteomics Deciphers Physiopathology of High-Risk Mantle Cell Lymphoma
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Charline Fuseau, Mathieu Baldacini, Alina Nicolae, Laurent Miguet, Laurent Mauvieux, Laurent Vallat, Claire Domon-Dell, Manuela Tavian, Jean-Noel Freund, Sarah Cianferani, Christine Schaeffer-Reiss, Luc-Matthieu Fornecker, and Delphine C.M. Rolland
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Immunology ,Cell Biology ,Hematology ,Biochemistry - Published
- 2022
11. Resistance to glycation in the zebra finch: Mass spectrometry-based analysis and its perspectives for evolutionary studies of aging
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Charlotte Brun, Oscar Hernandez-Alba, Agnès Hovasse, François Criscuolo, Christine Schaeffer-Reiss, and Fabrice Bertile
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Glycated Hemoglobin ,Mammals ,Aging ,Endocrinology ,Hyperglycemia ,Genetics ,Animals ,Finches ,Cell Biology ,Molecular Biology ,Biochemistry ,Mass Spectrometry - Abstract
In humans, hyperglycemia is associated with protein glycation, which may contribute to aging. Strikingly, birds usually outlive mammals of the same body mass, while exhibiting high plasma glucose levels. However, how birds succeed in escaping pro-aging effects of glycation remains unknown. Using a specific mass spectrometry-based approach in captive zebra finches of known age, we recorded high glycaemia values but no glycated hemoglobin form was found. Still, we showed that zebra finch hemoglobin can be glycated in vitro, albeit only to a limited extent compared to its human homologue. This may be due to peculiar structural features, as supported by the unusual presence of three different tetramer populations with balanced proportions and a still bound cofactor that could be inositol pentaphosphate. High levels of the glycated forms of zebra finch plasma serotransferrin, carbonic anhydrase 2, and albumin were measured. Glucose, age or body mass correlations with either plasma glycated proteins or hemoglobin isoforms suggest that those variables may be future molecular tools of choice to monitor glycation and its link with individual fitness. Our molecular advance may help determine how evolution succeeded in associating flying ability, high blood glucose and long lifespan in birds.
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- 2022
12. A class of valuable (pro-)activity-based protein profiling probes: application to the redox-active antiplasmodial agent, plasmodione
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Sarah Cianférani, Vrushali Khobragade, Christine Schaeffer-Reiss, Leandro Cotos, Maxime Donzel, Mourad Elhabiri, Elisabeth Davioud-Charvet, Bogdan Adam Cichocki, Stéphanie Blandin, Jean-Marc Strub, Gaillard, Brigitte, Laboratoire d'innovation moléculaire et applications (LIMA), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Réponse immunitaire et developpement chez les insectes (RIDI - UPR 9002), Institut de biologie moléculaire et cellulaire (IBMC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Modèles Insectes de l'Immunité Innée (M3I), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and ANR-11-LABX-0024,ParaFrap,Alliance française contre les maladies parasitaires(2011)
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quinone ,[SDV]Life Sciences [q-bio] ,[CHIM.THER]Chemical Sciences/Medicinal Chemistry ,010402 general chemistry ,01 natural sciences ,Interactome ,Article ,electrophile ,chemistry.chemical_compound ,3-benz(o)ylmenadione ,[CHIM] Chemical Sciences ,[CHIM]Chemical Sciences ,Binding site ,Mode of action ,photoaffinity labelling ,Heme ,QD1-999 ,antimalarial ,Photoaffinity labeling ,010405 organic chemistry ,Activity-based proteomics ,Combinatorial chemistry ,photoredox ,0104 chemical sciences ,3. Good health ,Quinone ,[SDV] Life Sciences [q-bio] ,Chemistry ,chemistry ,Activity-based protein profiling ,Chimie/Chimie thérapeutique ,CuAAC ,photoaffinity labeling ,Protein ligand - Abstract
International audience; Plasmodione (PD) is a potent antimalarial redox-active drug acting at low nM range concentrations on different malaria parasite stages. In this study, in order to determine the precise PD protein interactome in parasites, we developed a class of (pro-)activity-based protein profiling probes (ABPP) as precursors of photoreactive benzophenonelike probes based on the skeleton of PD metabolites (PDO) generated in a cascade of redox reactions. Under UV-photoirradiation, we clearly demonstrate that benzylic oxidation of 3-benzylmenadione 11 produces the 3-benzoylmenadione probe 7, allowing investigation of the proof-of-concept of the ABPP strategy with 3-benzoylmenadiones 7-10. The synthesized 3-benzoylmenadiones, probe 7 with an alkyne group or probe 9 with-NO2 in para position of the benzoyl chain, were found to be the most efficient photoreactive and clickable probes. In the presence of various H-donor partners, the UV-irradiation of the photo-reactive ABPP probes generates different adducts, the expected 'benzophenone-like' adducts (pathway 1) in addition to 'benzoxanthone' adducts (via two other pathways, 2 and 3). Using both human and Plasmodium falciparum glutathione reductases three protein ligand binding sites were identified following photolabeling with probes 7 or 9. The photoreduction of 3-benzoylmenadiones (PDO and probe 9) promoting the formation of both the corresponding benzoxanthone and the derived enone could be replaced by the glutathione reductase-catalyzed reduction step. In particular, the electrophilic character of the benzoxanthone was evidenced by its ability to alkylate heme, as a relevant event supporting the antimalarial mode of action of PD. This work provides a proof-of-principle that (pro-)ABPP probes can generate benzophenonelike metabolites enabling optimized activity-based protein profiling conditions that will be instrumental to analyse the interactome of early-lead antiplasmodial 3-benzylmenadiones displaying an original and innovative mode of action.
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- 2021
13. Correction: An essential role for α4A-tubulin in platelet biogenesis
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Catherine Strassel, Maria M Magiera, Arnaud Dupuis, Morgane Batzenschlager, Agnès Hovasse, Irina Pleines, Paul Guéguen, Anita Eckly, Sylvie Moog, Léa Mallo, Quentin Kimmerlin, Stéphane Chappaz, Jean-Marc Strub, Natarajan Kathiresan, Henri de la Salle, Alain Van Dorsselaer, Claude Ferec, Jean-Yves Py, Christian Gachet, Christine Schaeffer-Reiss, Benjamin T Kile, Carsten Janke, and François Lanza
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Ecology ,biology ,Health, Toxicology and Mutagenesis ,Published Erratum ,macromolecular substances ,Plant Science ,Computational biology ,Biochemistry, Genetics and Molecular Biology (miscellaneous) ,Blot ,Tubulin ,biology.protein ,Platelet ,Research Articles ,Biogenesis ,Research Article - Abstract
Alpha4A-tubulin is the predominant α-tubulin isotype in platelets. Mutations in α4A-tubulin cause abnormal platelet biogenesis and marginal band formation in mice and in a patient, establishing an essential role of this tubulin isotype., During platelet biogenesis, microtubules (MTs) are arranged into submembranous structures (the marginal band) that encircle the cell in a single plane. This unique MT array has no equivalent in any other mammalian cell, and the mechanisms responsible for this particular mode of assembly are not fully understood. One possibility is that platelet MTs are composed of a particular set of tubulin isotypes that carry specific posttranslational modifications. Although β1-tubulin is known to be essential, no equivalent roles of α-tubulin isotypes in platelet formation or function have so far been reported. Here, we identify α4A-tubulin as a predominant α-tubulin isotype in platelets. Similar to β1-tubulin, α4A-tubulin expression is up-regulated during the late stages of megakaryocyte differentiation. Missense mutations in the α4A-tubulin gene cause macrothrombocytopenia in mice and humans. Defects in α4A-tubulin lead to changes in tubulin tyrosination status of the platelet tubulin pool. Ultrastructural defects include reduced numbers and misarranged MT coils in the platelet marginal band. We further observed defects in megakaryocyte maturation and proplatelet formation in Tuba4a-mutant mice. We have, thus, discovered an α-tubulin isotype with specific and essential roles in platelet biogenesis.
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- 2021
14. A spatial vascular transcriptomic, proteomic, and phosphoproteomic atlas unveils an angiocrine Tie–Wnt signaling axis in the liver
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Jingjing Shi, Moritz Jakab, Mathias Heikenwalder, Shalev Itzkovitz, Martin Schneider, Indrabahadur Singh, Shubhada Rajabhau Kulkarni, Paula Argos Vélez, Michael Boutros, Maria Riedel, Ki Hong Lee, Thomas Ruppert, Sudhakar Chintharlapalli, Hellmut G. Augustin, Dominic Helm, Carleen Spegg, Guanxiong Wang, Marziyeh Komeili, Christine Schaeffer-Reiss, Shani Ben-Moshe, and Donato Inverso
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Proteomics ,Resource ,Quantitative proteomics ,Biology ,General Biochemistry, Genetics and Molecular Biology ,Receptor tyrosine kinase ,transcriptomics ,Wnt ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,liver endothelial cell (L-EC) ,Humans ,Regeneration ,Endothelium ,RNA-Seq ,Phosphorylation ,Wnt Signaling Pathway ,Molecular Biology ,030304 developmental biology ,0303 health sciences ,Phosphoproteomics ,Wnt signaling pathway ,Endothelial Cells ,Gene Expression Regulation, Developmental ,phosphoproteomics ,vascular zonation ,Tyrosine phosphorylation ,Cell Biology ,Flow Cytometry ,Phosphoproteins ,Liver Regeneration ,Cell biology ,Tie2 ,Liver ,Tie1 ,chemistry ,angiocrine factors ,Proteome ,Hepatocytes ,biology.protein ,Single-Cell Analysis ,Transcriptome ,030217 neurology & neurosurgery ,Developmental Biology - Abstract
Summary Single-cell transcriptomics (scRNA-seq) has revolutionized the understanding of the spatial architecture of tissue structure and function. Advancing the “transcript-centric” view of scRNA-seq analyses is presently restricted by the limited resolution of proteomics and genome-wide techniques to analyze post-translational modifications. Here, by combining spatial cell sorting with transcriptomics and quantitative proteomics/phosphoproteomics, we established the spatially resolved proteome landscape of the liver endothelium, yielding deep mechanistic insight into zonated vascular signaling mechanisms. Phosphorylation of receptor tyrosine kinases was detected preferentially in the central vein area, resulting in an atypical enrichment of tyrosine phosphorylation. Prototypic biological validation identified Tie receptor signaling as a selective and specific regulator of vascular Wnt activity orchestrating angiocrine signaling, thereby controlling hepatocyte function during liver regeneration. Taken together, the study has yielded fundamental insight into the spatial organization of liver endothelial cell signaling. Spatial sorting may be employed as a universally adaptable strategy for multiomic analyses of scRNA-seq-defined cellular (sub)-populations., Graphical abstract, Highlights • ScRNA-seq-guided spatial sort enables multiomic dissection of the liver vasculature • Liver sinusoidal endothelial cells have a hybrid vascular-lymphatic phenotype • Tyrosine phosphorylation of endothelial cell molecules is enriched on central vein • Endothelial Tie1 shapes hepatic Wnt signal zonation and promotes liver regeneration, Inverso, Shi et al. generate a multiomic encyclopedia of liver endothelial cells (L-ECs) with spatial resolution of transcriptome, proteome, and phosphoproteome. The study provides insight into liver vascular zonation and a template for scRNA-seq-data-guided spatial proteome and phosphoproteome analyses.
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- 2021
15. Developing a reference system for the IFCC standardization of HbA 2
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Donatella Caruso, Maria Ospina, Víctor R. De Jesús, Christine Schaeffer-Reiss, Barbara Wild, Patricia Kaiser, Emmanuel Bissé, Andrea Mosca, Renata Paleari, Alain Van Dorsselaer, and Cristian G. Arsene
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medicine.medical_specialty ,Blood Chemical Analysis ,Standardization ,Computer science ,Biochemistry (medical) ,Clinical Biochemistry ,General Medicine ,030204 cardiovascular system & hematology ,Biochemistry ,03 medical and health sciences ,0302 clinical medicine ,Certified reference materials ,Reference measurement ,030220 oncology & carcinogenesis ,medicine ,Medical physics ,Reference standards - Abstract
The importance of hemoglobin A2 (HbA2) as an indicator of the presence of β-thalassemia was established many years ago. However, clinical application of recommended HbA2 cut off values is often hampered due to poor equivalence of HbA2 results among methods and laboratories. Thus, the IFCC standardization program for HbA2 was initiated in 2004 with the goal of achieving a complete reference system for this measurand. HbA2 standardization efforts are still in progress, including the development of a higher-order HbA2 reference measurement procedure and the preparation of a certified reference material in collaboration with the IRMM. Here, we review the past, present and future of HbA2 standardization and describe the current status of HbA2 testing.
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- 2017
16. Proteomics towards the understanding of elicitor induced resistance of grapevine against downy mildew
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Christelle Lemaître-Guillier, Benoît Poinssot, Christine Schaeffer-Reiss, Sophie Trouvelot, Marielle Adrian, Agnès Hovasse, Xavier Daire, Marie-Claire Héloir, Ghislaine Recorbet, Agroécologie [Dijon], Institut National de la Recherche Agronomique ( INRA ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté ( UBFC ), UMR 7178 Institut pluridisciplinaire Hubert Curien (IPHC) - Laboratoire de Spectrométrie de Masse BioOrganique, Centre National de la Recherche Scientifique ( CNRS ), Université de Strasbourg ( UNISTRA ), BIVB (Bureau Interprofessionnel des Vins de Bourgogne), Conseil Regional de Bourgogne [2013 - 9201AA0050S02328], Université de Bourgogne (UB)-Institut National de la Recherche Agronomique (INRA)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Laboratoire de Spectrométrie de Masse BioOrganique [Strasbourg] (LSMBO), Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA), Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC), and Centre National de la Recherche Scientifique (CNRS)
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Proteomics ,0106 biological sciences ,0301 basic medicine ,[SDV]Life Sciences [q-bio] ,Biophysics ,Laminarin ,01 natural sciences ,Biochemistry ,Plasmopara viticola ,03 medical and health sciences ,Gene Expression Regulation, Plant ,Botany ,Plant defense against herbivory ,Vitis ,Leaf proteome ,Glucans ,Pathogen ,Disease Resistance ,Plant Diseases ,Plant Proteins ,2. Zero hunger ,Peronospora ,[ SDV ] Life Sciences [q-bio] ,biology ,food and beverages ,Induced resistance ,Biotic stress ,2-DE ,biology.organism_classification ,Elicitor ,Plant Leaves ,Fungicide ,030104 developmental biology ,Vitis vinifera ,Downy mildew ,Electrophoresis, Polyacrylamide Gel ,Resistance Process ,010606 plant biology & botany - Abstract
Elicitors are known to trigger plant defenses in response to biotic stress, but do not systematically lead to effective resistance to pathogens. The reasons explaining such differences remain misunderstood. Therefore, elicitation and induced resistance (IR) were investigated through the comparison of two modified β-1,3 glucans applied on grapevine (Vitis vinifera) leaves before and after inoculation with Plasmopara viticola, the causal agent of downy mildew. The sulfated (PS3) and the shortened (H13) forms of laminarin are both known to elicit defense responses whereas only PS3 induces resistance against downy mildew. The analysis of the 2-DE gel electrophoresis revealed that PS3 and H13 induced distinct proteomic profiles after treatment and pathogen inoculation. Our results point out that the PS3-induced resistance is associated with the activation of the primary metabolism especially on amino acids and carbohydrates pathways. In addition, few proteins, such as the 12-oxophytodienoate reductase (OPR-like) related to the OPDA pathway, and an Arsenite-resistance protein (Serrate-like protein) could be considered as useful markers of induced resistance. Significance One strategy to reduce the application of fungicides is the use of elicitors which induce plant defense responses. Nonetheless, the elicitors do not systematically lead to resistance against pathogens. The lack of correlation between plant defense activation and induced resistance (IR) requires the investigation of what makes the specificity of elicitor-IR. In this study, the two β-glucans elicitors, sulfated (PS3) and short (H13) laminarins, were used in the grapevine/Plasmopara viticola interaction since only the first one leads to resistance against downy mildew. To disclose IR specificity, proteomic approach has been employed to compare the two treatments before and after P. viticola inoculation. The analysis of the 2-DE revealed that PS3 and H13 induced distinct proteomic profiles after treatment and pathogen inoculation. Significant increase of the number of proteins regulated by PS3, relative to both H13 and time-points, is correlated with the resistance process establishment. Our results point that the PS3-induced resistance requires the activation of the primary metabolism especially on amino acids and carbohydrates pathways. In addition, few proteins, such as the 12-oxophytodienoate reductase (OPR-like) related to the OPDA pathway, and an Arsenite-resistance protein (Serrate-like protein) could constitute useful markers of PS3 induced resistance.
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- 2017
17. Phosphomimetic substitution at Ser-33 of the chloroquine resistance transporter PfCRT reconstitutes drug responses in
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Cecilia P, Sanchez, Sonia, Moliner Cubel, Britta, Nyboer, Monika, Jankowska-Döllken, Christine, Schaeffer-Reiss, Daniel, Ayoub, Gabrielle, Planelles, and Michael, Lanzer
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Antimalarials ,Kinetics ,Parasitic Sensitivity Tests ,parasitic diseases ,Plasmodium falciparum ,Drug Resistance ,Protozoan Proteins ,Serine ,Membrane Transport Proteins ,Chloroquine ,Phosphorylation ,Microbiology - Abstract
The chloroquine resistance transporter PfCRT of the human malaria parasite Plasmodium falciparum confers resistance to the former first-line antimalarial drug chloroquine, and it modulates the responsiveness to a wide range of quinoline and quinoline-like compounds. PfCRT is post-translationally modified by phosphorylation, palmitoylation, and, possibly, ubiquitination. However, the impact of these post-translational modifications on P. falciparum biology and, in particular, the drug resistance–conferring activity of PfCRT has remained elusive. Here, we confirm phosphorylation at Ser-33 and Ser-411 of PfCRT of the chloroquine-resistant P. falciparum strain Dd2 and show that kinase inhibitors can sensitize drug responsiveness. Using CRISPR/Cas9 genome editing to generate genetically engineered PfCRT variants in the parasite, we further show that substituting Ser-33 with alanine reduced chloroquine and quinine resistance by ∼50% compared with the parental P. falciparum strain Dd2, whereas the phosphomimetic amino acid aspartic acid could fully and glutamic acid could partially reconstitute the level of chloroquine/quinine resistance. Transport studies conducted in the parasite and in PfCRT-expressing Xenopus laevis oocytes linked phosphomimetic substitution at Ser-33 to increased transport velocity. Our data are consistent with phosphorylation of Ser-33 relieving an autoinhibitory intramolecular interaction within PfCRT, leading to a stimulated drug transport activity. Our findings shed additional light on the function of PfCRT and suggest that chloroquine could be reevaluated as an antimalarial drug by targeting the kinase in P. falciparum that phosphorylates Ser-33 of PfCRT.
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- 2019
18. An essential role for α4A-tubulin in platelet biogenesis
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Alain Van Dorsselaer, Claude Férec, Arnaud Dupuis, Benjamin T. Kile, Christine Schaeffer-Reiss, Carsten Janke, Morgane Batzenschlager, Irina Pleines, François Lanza, Paul Gueguen, Léa Mallo, Anita Eckly, Maria M. Magiera, Jean Marc Strub, Catherine Strassel, Christian Gachet, Sylvie Moog, Jean-Yves Py, Agnès Hovasse, Quentin Kimmerlin, Stephane Chappaz, Natarajan Kathiresan, Biologie et pharmacologie des plaquettes sanguines: hémostase, thrombose, transfusion, Université de Strasbourg (UNISTRA)-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Curie [Paris], Stress génotoxiques et cancer, Université Paris-Sud - Paris 11 (UP11)-Institut Curie [Paris]-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Analyses de Biologie Médicale (LABM), Institut National de la Santé et de la Recherche Médicale (INSERM)-EFS Alsace, Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Génétique moléculaire et génétique épidémiologique, Université de Brest (UBO)-Institut National de la Santé et de la Recherche Médicale (INSERM), Division of Developmental Immunology (DKBW), University of Basel (Unibas), Etablissement Français du Sang Bretagne, EFS, Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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Blood Platelets ,Male ,0301 basic medicine ,Alkylating Agents ,Health, Toxicology and Mutagenesis ,Megakaryocyte differentiation ,Mutation, Missense ,Antigens, CD34 ,Plant Science ,macromolecular substances ,[SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC] ,Microtubules ,Corrections ,Biochemistry, Genetics and Molecular Biology (miscellaneous) ,Thrombopoiesis ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Megakaryocyte ,Tubulin ,Microtubule ,[SDV.BC.IC]Life Sciences [q-bio]/Cellular Biology/Cell Behavior [q-bio.CB] ,medicine ,Animals ,Humans ,Platelet ,[SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biochemistry [q-bio.BM] ,Cells, Cultured ,Mice, Inbred BALB C ,Ecology ,biology ,Platelet Count ,Chemistry ,Correction ,Thrombocytopenia ,Isotype ,Tissue Donors ,3. Good health ,Cell biology ,030104 developmental biology ,medicine.anatomical_structure ,Ethylnitrosourea ,030220 oncology & carcinogenesis ,biology.protein ,Megakaryocytes ,Biogenesis - Abstract
During platelet biogenesis, microtubules (MTs) are arranged into submembranous structures (the marginal band) that encircle the cell in a single plane. This unique MT array has no equivalent in any other mammalian cell, and the mechanisms responsible for this particular mode of assembly are not fully understood. One possibility is that platelet MTs are composed of a particular set of tubulin isotypes that carry specific posttranslational modifications. Although β1-tubulin is known to be essential, no equivalent roles of α-tubulin isotypes in platelet formation or function have so far been reported. Here, we identify α4A-tubulin as a predominant α-tubulin isotype in platelets. Similar to β1-tubulin, α4A-tubulin expression is up-regulated during the late stages of megakaryocyte differentiation. Missense mutations in the α4A-tubulin gene cause macrothrombocytopenia in mice and humans. Defects in α4A-tubulin lead to changes in tubulin tyrosination status of the platelet tubulin pool. Ultrastructural defects include reduced numbers and misarranged MT coils in the platelet marginal band. We further observed defects in megakaryocyte maturation and proplatelet formation inTuba4a-mutant mice. We have, thus, discovered an α-tubulin isotype with specific and essential roles in platelet biogenesis.
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- 2019
19. Use of an innovative system and nanotechnology-based strategy for therapeutic applications of Gla-rich protein (GRP)
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Justine Schneider, Marta S. Rafael, Christine Schaeffer-Reiss, Arnaud Poterszman, António Alves de Matos, Nuna Araújo, Dina C. Simes, Carla Viegas, Anjos L. Macedo, and Evelina Edelweiss
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Vitamin ,Inflammation ,Calcification inhibitor ,business.industry ,Free Communications Biology and Biochemistry ,General Medicine ,Therapeutics ,030204 cardiovascular system & hematology ,medicine.disease ,3. Good health ,Calcification ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,chemistry ,medicine ,Cancer research ,030212 general & internal medicine ,Extracellular vesicles (EVs) ,medicine.symptom ,business ,hormones, hormone substitutes, and hormone antagonists - Abstract
Introduction: Gla-rich protein (GRP) is a vitamin K-dependent protein (VKDP) acting as a calcification inhibitor and anti-inflammatory agent in cardiovascular and articular systems, and THP1 monocyte/macrophage cells [1,2]. Calcification and inflammation processes are known to be involved in the etiology of several calcification-related chronic inflammatory diseases such as atherosclerosis, CKD and osteoarthritis, in a complex bi-directional interplay that drives disease progression. Here, we developed an innovative system to produce human c-carboxylated GRP (cGRP), and a nanotechnology strategy based on GRP loading into extracellular vesicles (EVs) as a gold standard delivery system for GRP in therapeutic applications. Materials and methods: Human GRP protein was co-expressed with c-carboxylase enzyme (GGCX), vitamin K oxidoreductase (GGCX) and furin, in the insect cell baculovirus system in the presence of vitamin K. GRP released in the cell culture media was characterized by mass spectrometry based techniques and Western blot analysis. EVs released by the insect cells overexpressing GRP were isolated by ultracentrifugation, and characterized for GRP content through TEM-immunogold staining, Western blot, ELISA, qPCR. Functional assays using isolated EVs containing GRP were performed in primary vascular smooth muscle cells (VSMCs) and THP1 monocyte/macrophage cells, for anti-mineralizing and anti-inflammatory screening.Results: GRP released in the cell culture media when co-expressed with GGCX, VKOR and furin in the presence of vitamin K, is processed at the pro-peptide and contain Gla residues. EVs released by the insect cells in this system were shown to be loaded with GRP protein and mRNA, and capable of reducing ECM calcium deposition of calcifying VSMCs and the production of TNFa in THP1 monocyte/macrophage cells stimulated with LPS. Discussion and conclusions: While the successful production of human cGRP constitutes a major achievement, this innovative methodology will open new opportunities for the production of other biological active VKDPs. Furthermore, EVs loaded with GRP were shown to have anti-mineralizing and anti-inflammatory properties, with promising therapeutic potentialities for calcification-related chronic inflammatory diseases. Portuguese Foundation for Science and Technology (EU/PID1003201) info:eu-repo/semantics/publishedVersion
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- 2019
20. Phosphomimetic substitution at Ser-33 of the chloroquine resistance transporter PfCRT reconstitutes drug responses in Plasmodium falciparum
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Michael Lanzer, Cecilia P. Sanchez, Daniel Ayoub, Christine Schaeffer-Reiss, Britta Nyboer, Monika Jankowska-Döllken, Gabrielle Planelles, Sonia Moliner Cubel, Heidelberg University Hospital [Heidelberg], Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Métabolisme et physiologie rénales (ERL 8228), Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), and École pratique des hautes études (EPHE)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-École pratique des hautes études (EPHE)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)
- Subjects
0301 basic medicine ,Plasmodium ,PfCRT ,kinase inhibitor ,malaria ,Drug resistance ,Pharmacology ,Biochemistry ,virulence factor ,03 medical and health sciences ,Palmitoylation ,Chloroquine ,parasitic diseases ,medicine ,[CHIM]Chemical Sciences ,genome editing ,transport velocity ,[SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology ,Molecular Biology ,Quinine ,posttranslational modification ,drug resistance ,030102 biochemistry & molecular biology ,biology ,Kinase ,Chemistry ,phosphorylation ,Plasmodium falciparum ,Transporter ,Cell Biology ,biology.organism_classification ,3. Good health ,030104 developmental biology ,[SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology ,Phosphorylation ,medicine.drug - Abstract
International audience; The chloroquine resistance transporter PfCRT of the human malaria parasite Plasmodium falciparum confers resistance to the former first-line antimalarial drug chloroquine, and it modulates the responsiveness to a wide range of quinoline and quinoline-like compounds. PfCRT is post-translationally modified by phosphorylation, palmitoylation, and, possibly, ubiquitination. However, the impact of these post-translational modifications on P. falciparum biology and, in particular, the drug resistance–conferring activity of PfCRT has remained elusive. Here, we confirm phosphorylation at Ser-33 and Ser-411 of PfCRT of the chloroquine-resistant P. falciparum strain Dd2 and show that kinase inhibitors can sensitize drug responsiveness. Using CRISPR/Cas9 genome editing to generate genetically engineered PfCRT variants in the parasite, we further show that substituting Ser-33 with alanine reduced chloroquine and quinine resistance by ∼50% compared with the parental P. falciparum strain Dd2, whereas the phosphomimetic amino acid aspartic acid could fully and glutamic acid could partially reconstitute the level of chloroquine/quinine resistance. Transport studies conducted in the parasite and in PfCRT-expressing Xenopus laevis oocytes linked phosphomimetic substitution at Ser-33 to increased transport velocity. Our data are consistent with phosphorylation of Ser-33 relieving an autoinhibitory intramolecular interaction within PfCRT, leading to a stimulated drug transport activity. Our findings shed additional light on the function of PfCRT and suggest that chloroquine could be reevaluated as an antimalarial drug by targeting the kinase in P. falciparum that phosphorylates Ser-33 of PfCRT.
- Published
- 2019
21. Combinatorial regulation of hepatic cytoplasmic signaling and nuclear transcriptional events by the OGT/REV-ERBα complex
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Agnès Hovasse, Manjula Vinod, Jérôme Eeckhoute, Jeremy Alexandre, Alexandre Berthier, Julie Dubois-Chevalier, Fabrice Bray, Maheul Ploton, Xavier Marechal, Bart Staels, Christine Schaeffer-Reiss, Agata Steenackers, Hélène Duez, Philippe Lefebvre, Geoffrey Porez, Sarah Cianférani, Christian Rolando, Nao Yamakawa, Céline Gheeraert, Tony Lefebvre, Récepteurs nucléaires, maladies cardiovasculaires et diabète - U 1011 (RNMCD), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Spectrométrie de Masse BioOrgan [Université de Strasbourg], Université de Strasbourg (UNISTRA), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 (MSAP), Biochimie Structurale et Fonctionnelle des Assemblages Biomoléculaires - CNRS FR3688 (FRABio), Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), This work was supported by Agence Nationale de la Recherche Grants OGlcRev and ANR-10-LABX-46, Fondation pour la Recherche Médicale Grant Equipe labellisée FRM 2015 DEQ20150331724, European Foundation for the Study of Diabetes/Lilly European Diabetes Research Program, European Commission EuRhythDia FP7-health Grant 278397, and French Proteomic Infrastructure Grant ANR-10-INBS-08–03. B.S. is a recipient of Advanced European Council Grant 694717. OGlcNAcylated protein identification was done at 'Plateforme Analyses Glycoconjugués' (FR3688 FRABio, CNRS, Université de Lille)., ANR-10-LABX-0046,EGID,EGID Diabetes Pole(2010), European Project: 278397,EC:FP7:HEALTH,FP7-HEALTH-2011-two-stage,EURHYTHDIA(2011), European Project: 694717,H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) ,ImmunoBile(2016), Inserm, Université de Lille, CHU Lille, CNRS, Récepteurs nucléaires, maladies cardiovasculaires et diabète - U 1011 [RNMCD], Unité de Glycobiologie Structurale et Fonctionnelle UMR 8576 [UGSF], Institut Pluridisciplinaire Hubert Curien [IPHC], Laboratoire de Spectrométrie de Masse BioOrganique [Strasbourg] [LSMBO], Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - UAR 3290 [MSAP], Récepteurs nucléaires, maladies cardiovasculaires et diabète (EGID), Université de Lille, Droit et Santé-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Unité de Glycobiologie Structurale et Fonctionnelle - UMR 8576 (UGSF), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Miniaturisation pour l'Analyse, la Synthèse & la Protéomique (USR CNRS 3290), Centre National de la Recherche Scientifique (CNRS), Fédération de Recherche Biochimie Structurale et Fonctionnelle des Assemblages Biomoléculaires (FRABio - CNRS FR3688), Institut Michel Eugène Chevreul [Villeneuve d’Ascq] (CNRS FR 2638), Centre National de la Recherche Scientifique (CNRS)-Université de Lille, ANR-10-LABX-0046/10-LABX-0046,EGID,EGID Diabetes Pole(2010), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut National de la Recherche Agronomique (INRA)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Miniaturisation pour la Synthèse, l’Analyse et la Protéomique - USR 3290 (MSAP), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Institut de Chimie du CNRS (INC), Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Derudas, Marie-Hélène, EGID Diabetes Pole - - EGID2010 - ANR-10-LABX-0046 - LABX - VALID, Chronotherapeutic lifestyle intervention for diabetes and obesity to reset the circadian rhythm and improve cardiometabolic risk in the European working population - EURHYTHDIA - - EC:FP7:HEALTH2011-10-01 - 2017-06-30 - 278397 - VALID, Bile acid, immune-metabolism, lipid and glucose homeostasis - ImmunoBile - - H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) 2016-09-01 - 2021-08-31 - 694717 - VALID, and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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0301 basic medicine ,viruses ,Circadian clock ,N-Acetylglucosaminyltransferases ,Biochemistry ,Mice ,03 medical and health sciences ,O-GlcNAcylation ,REV-ERBα ,Cell Line, Tumor ,Circadian Clocks ,Gene expression ,[SDV.BBM] Life Sciences [q-bio]/Biochemistry, Molecular Biology ,Animals ,Humans ,Insulin ,[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology ,Phosphorylation ,Nuclear protein ,Protein kinase B ,Mice, Knockout ,Multidisciplinary ,biology ,Kinase ,Chemistry ,Hep G2 Cells ,Biological Sciences ,Lipid Metabolism ,Cell biology ,Mice, Inbred C57BL ,Insulin receptor ,Glucose ,HEK293 Cells ,030104 developmental biology ,PNAS Plus ,Gene Expression Regulation ,Liver ,Nuclear receptor ,Regulatory sequence ,epigenomics ,metabolism ,Signal Transduction ,Nuclear Receptor Subfamily 1, Group D, Member 1 ,biology.protein ,Sterol Regulatory Element Binding Protein 1 ,Proto-Oncogene Proteins c-akt ,signal transduction - Abstract
Significance Using an interactomic approach, we have identified the nuclear receptor REV-ERBα as a O-GlcNAc transferase (OGT) protein partner. REV-ERBα protects cytoplasmic OGT from proteasomal degradation and facilitates cytosolic and nuclear protein O-GlcNAcylation while REV-ERα ligands decreased cytoplasmic OGT activity. REV-ERBα thus exerts pleiotropic activities through OGT, coordinating signal transduction, epigenomic programming, and transcriptional response in the liver., The nuclear receptor REV-ERBα integrates the circadian clock with hepatic glucose and lipid metabolism by nucleating transcriptional comodulators at genomic regulatory regions. An interactomic approach identified O-GlcNAc transferase (OGT) as a REV-ERBα−interacting protein. By shielding cytoplasmic OGT from proteasomal degradation and favoring OGT activity in the nucleus, REV-ERBα cyclically increased O-GlcNAcylation of multiple cytoplasmic and nuclear proteins as a function of its rhythmically regulated expression, while REV-ERBα ligands mostly affected cytoplasmic OGT activity. We illustrate this finding by showing that REV-ERBα controls OGT-dependent activities of the cytoplasmic protein kinase AKT, an essential relay in insulin signaling, and of ten-of-eleven translocation (TET) enzymes in the nucleus. AKT phosphorylation was inversely correlated to REV-ERBα expression. REV-ERBα enhanced TET activity and DNA hydroxymethylated cytosine (5hmC) levels in the vicinity of REV-ERBα genomic binding sites. As an example, we show that the REV-ERBα/OGT complex modulates SREBP-1c gene expression throughout the fasting/feeding periods by first repressing AKT phosphorylation and by epigenomically priming the Srebf1 promoter for a further rapid response to insulin. Conclusion: REV-ERBα regulates cytoplasmic and nuclear OGT-controlled processes that integrate at the hepatic SREBF1 locus to control basal and insulin-induced expression of the temporally and nutritionally regulated lipogenic SREBP-1c transcript.
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- 2018
22. N-terminome analysis of the human mitochondrial proteome
- Author
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Daniel Ayoub, Lydie Lane, Magali Rompais, Amos Marc Bairoch, Christine Carapito, Thierry Rabilloud, Christine Schaeffer-Reiss, Alvaro Sebastian Vaca Jacome, Alain Van Dorsselaer, Laboratoire de Spectrométrie de Masse BioOrganique [Strasbourg] (LSMBO), Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Protéomique, Métaux et Différenciation (ProMD ), Laboratoire de Chimie et Biologie des Métaux (LCBM - UMR 5249), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Swiss Institute of Bioinformatics [Lausanne] (SIB), Université de Lausanne = University of Lausanne (UNIL), Département de science des protéines humaines [Genève], Université de Genève = University of Geneva (UNIGE)-Faculté de médecine [Genève], Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Lausanne (UNIL), and Université de Genève (UNIGE)-Faculté de médecine [Genève]
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Proteomics ,Protein Conformation ,Human mitochondria ,dN-TOP approach ,[SDV.BC]Life Sciences [q-bio]/Cellular Biology ,Computational biology ,Biology ,Cleavage (embryo) ,Bioinformatics ,Biochemistry ,Mass Spectrometry ,Mitochondrial Proteins ,Organophosphorus Compounds ,Protein structure ,[SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN] ,Labelling ,Transit Peptide ,Humans ,ddc:576 ,Molecular Biology ,Mitochondrial protein ,Transit peptide ,Proteogenomics ,Animal proteomics ,Mitochondrial proteome ,Free N-terminome analysis ,Isotope Labeling - Abstract
International audience; The high throughput characterization of protein N-termini is becoming an emerging challenge in the proteomics and proteogenomics fields. The present study describes the free N-terminome analysis of human mitochondria-enriched samples using trimethoxyphenyl phosphonium (TMPP) labelling approaches. Owing to the extent of protein import and cleavage for mitochondrial proteins, determining the new N-termini generated after translocation/processing events for mitochondrial proteins is crucial to understand the transformation of precursors to mature proteins. The doublet N-terminal oriented proteomics (dN-TOP) strategy based on a double light/heavy TMPP labelling has been optimized in order to improve and automate the workflow for efficient, fast and reliable high throughput N-terminome analysis. A total of 2714 proteins were identified and 897 N-terminal peptides were characterized (424 N-α-acetylated and 473 TMPP-labelled peptides). These results allowed the precise identification of the N-terminus of 693 unique proteins corresponding to 26% of all identified proteins. Overall, 120 already annotated processing cleavage sites were confirmed while 302 new cleavage sites were characterized. The accumulation of experimental evidence of mature N-termini should allow increasing the knowledge of processing mechanisms and consequently also enhance cleavage sites prediction algorithms. Complete datasets have been deposited to the ProteomeXchange Consortium with identifiers PXD001521, PXD001522 and PXD001523 (http://proteomecentral.proteomexchange.org/dataset/PXD001521, http://proteomecentral.proteomexchange.org/dataset/PXD0001522 and http://proteomecentral.proteomexchange.org/dataset/PXD001523, respectively).
- Published
- 2015
23. Characterization of the N-Terminal Heterogeneities of Monoclonal Antibodies Using In-Gel Charge Derivatization of α-Amines and LC-MS/MS
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Daniel Ayoub, Diego Bertaccini, Elsa Wagner-Rousset, Olivier Colas, Alain Beck, Alain Van Dorsselaer, Christine Schaeffer-Reiss, Sarah Cianférani, and Hélène Diemer
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Gene isoform ,Signal peptide ,Chromatography ,Chemistry ,medicine.drug_class ,Antibodies, Monoclonal ,Sequence (biology) ,Monoclonal antibody ,Mass spectrometry ,Amides ,Cell Line ,Analytical Chemistry ,law.invention ,chemistry.chemical_compound ,Tandem Mass Spectrometry ,law ,medicine ,Recombinant DNA ,Humans ,Phosphonium ,Derivatization ,Gels ,Chromatography, Liquid - Abstract
The bioproduction of recombinant monoclonal antibodies results in complex mixtures of a main isoform and numerous macro- and microvariants. Monoclonal antibodies therefore present different levels of heterogeneities ranging from primary sequence variants to post-translational modifications. Among these heterogeneities, the truncation and fragmentation of the primary amino-acid sequence result in shorter or cleaved polypeptide chains while the incomplete processing of the signal peptide produces N-terminal elongated polypeptide chains. Here, we present an in-gel protein N-terminal chemical derivatization method using (N-succinimidyloxycarbonylmethyl)-tris(2,4,6-trimethoxyphenyl)phosphonium bromide (TMPP). This chemical tag enhances the detection by mass spectrometry of the N-terminal positions of proteins and allows their unambiguous assignment without altering the identification of internal digestion peptides. This method adds just one step to the classical peptide mapping workflow. Using this in-gel N-TOP (N-terminal oriented proteomics) strategy, the N-terminal sequence heterogeneities of several monoclonal antibodies, among which are minor unexpected proteoforms, were successfully detected and characterized.
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- 2015
24. 'Omics-' for a mapping of grapevine response to elicitors and identification of induced resistance markers
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Christelle Guillier, Marie-Claire Heloir, Xavier Daire, Agnès Hovasse, Christine Schaeffer-Reiss, Philippe Schmidt-Kopplin, Marianna Lucio, Chloé Roullier-Gall, Régis Gougeon, Sophie TROUVELOT, Benoît Poinssot, Marielle Adrian, Agroécologie [Dijon], Institut National de la Recherche Agronomique ( INRA ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté ( UBFC ), Laboratoire de Spectrométrie de Masse BioOrgan, Université de Strasbourg ( UNISTRA ), Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), Research Unit Analytical BioGeoChemistry ( BGC ), Helmholtz-Zentrum München ( HZM ), BGC Research Unit Analytical BioGeoChemistry, Germany Research Center Environmental Health, Analytical BioGeoChemistry, Institut Universitaire de la Vigne et du Vin 'Jules Guyot' ( IUVV Jules Guyot ), Université de Bourgogne ( UB ), ProdInra, Archive Ouverte, Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université Bourgogne Franche-Comté [COMUE] (UBFC), Université de Strasbourg (UNISTRA), Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Research Unit Analytical BioGeoChemistry (BGC), Helmholtz-Zentrum München (HZM), Institut Universitaire de la Vigne et du Vin 'Jules Guyot' (IUVV Jules Guyot), Université de Bourgogne (UB), Université de Bourgogne (UB)-Institut National de la Recherche Agronomique (INRA)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Germany Research Center for Environmental Health, Analytical BioGeoChemistry, and European Fondation for Plant Pathology (EFPP). INT.
- Subjects
[SDV] Life Sciences [q-bio] ,elicitor ,[ SDV ] Life Sciences [q-bio] ,[SDV]Life Sciences [q-bio] ,fungi ,omics ,food and beverages ,induced resistance ,grapevine - Abstract
SPEIPMINRAUBCNRS; "Omics-" for a mapping of grapevine response to elicitors and identification of induced resistance markers . 12. European Fondation for Plant Pathology (EFPP) & 10. French Society for Plant Pathology Conference ‘Deepen Knwoledge in Plant Pathology for Innovative Agro-Ecology’
- Published
- 2017
25. Doublet N-Terminal Oriented Proteomics for N-Terminomics and Proteolytic Processing Identification
- Author
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Benoit, Westermann, Alvaro Sebastian Vaca, Jacome, Magali, Rompais, Christine, Carapito, and Christine, Schaeffer-Reiss
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Proteomics ,Proteome ,Tandem Mass Spectrometry ,Isotope Labeling ,Proteolysis ,Statistics as Topic ,Peptide Fragments ,Chromatography, Liquid ,Workflow - Abstract
The study of the N-terminome and the precise identification of proteolytic processing events are key in biology. Dedicated methodologies have been developed as the comprehensive characterization of the N-terminome can hardly be achieved by standard proteomics methods. In this context, we have set up a trimethoxyphenyl phosphonium (TMPP) labeling approach that allows the characterization of both N-terminal and internal digestion peptides in a single experiment. This latter point is a major advantage of our strategy as most N-terminomics methods rely on the enrichment of N-terminal peptides and thus exclude internal peptides.We have implemented a double heavy/light TMPP labeling and an automated data validation workflow that make our doublet N-terminal oriented proteomics (dN-TOP) strategy efficient for high-throughput N-terminome analysis.
- Published
- 2017
26. Doublet N-Terminal Oriented Proteomics for N-Terminomics and Proteolytic Processing Identification
- Author
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Alvaro Sebastian Vaca Jacome, Magali Rompais, Benoit Westermann, Christine Carapito, and Christine Schaeffer-Reiss
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0301 basic medicine ,Automated data ,03 medical and health sciences ,Identification (information) ,030104 developmental biology ,Chromatography ,Proteomics methods ,Terminal (electronics) ,Context (language use) ,Computational biology ,Proteomics ,Proteogenomics - Abstract
The study of the N-terminome and the precise identification of proteolytic processing events are key in biology. Dedicated methodologies have been developed as the comprehensive characterization of the N-terminome can hardly be achieved by standard proteomics methods. In this context, we have set up a trimethoxyphenyl phosphonium (TMPP) labeling approach that allows the characterization of both N-terminal and internal digestion peptides in a single experiment. This latter point is a major advantage of our strategy as most N-terminomics methods rely on the enrichment of N-terminal peptides and thus exclude internal peptides.We have implemented a double heavy/light TMPP labeling and an automated data validation workflow that make our doublet N-terminal oriented proteomics (dN-TOP) strategy efficient for high-throughput N-terminome analysis.
- Published
- 2017
27. An evolutionary conserved zinc finger protein is involved in Toxoplasma gondii mRNA nuclear export
- Author
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Mathieu, Gissot, Agnès, Hovasse, Laurent, Chaloin, Christine, Schaeffer-Reiss, Alain, Van Dorsselaer, Stanislas, Tomavo, Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 (CIIL), Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), This work was supported by Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM), a grant from the French National Research Agency (ANR) [grant number ANR‐13‐JSV3‐0006‐01 to MG] and the Laboratoire d'Excellence (LabEx) ParaFrap [ANR‐11‐LABX‐0024 to ST]., ANR-11-LABX-0024,ParaFrap,Alliance française contre les maladies parasitaires(2011), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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Gene Knockdown Techniques ,Genetic Complementation Test ,Plasmodium falciparum ,parasitic diseases ,Active Transport, Cell Nucleus ,Kruppel-Like Transcription Factors ,CYS2-HIS2 Zinc Fingers ,Humans ,RNA, Viral ,[CHIM]Chemical Sciences ,Cell Cycle Checkpoints ,RNA, Messenger ,Toxoplasma - Abstract
International audience; Apicomplexan parasites are responsible for some of the most deadly parasitic diseases affecting humans and livestock. There is an urgent need for new medicines that will target apicomplexan-specific pathways. We characterized a Toxoplasma gondii C2H2 zinc finger protein, named TgZNF2, which is conserved among eukaryotes. We constructed an inducible KO strain (iKO-TgZNF2) for this gene where the tgznf2 gene expression is repressed in the presence of a tetracycline analog (ATc). We showed that the iKO-TgZNF2 parasites are unable to proliferate after depletion of the TgZNF2 protein. Complementation with a full length copy of the gene restores the phenotype Moreover, the homolog of this protein in the related apicomplexan Plasmodium falciparum was shown to efficiently rescue the phenotype, suggesting that this pathway is likely conserved among apicomplexan parasites. We demonstrated that the iKO-mutant lacking TgZNF2 are arrested during the cell cycle during the G1 phase. We identified potential protein partners of this protein among which are spliceosomal complex and mRNA nuclear export components. We confirmed that TgZNF2 is able to bind in vivo to transcripts but splicing is not perturbed in the ATc-treated parasites. Instead, we demonstrated that TgZNF2 depletion leads to the sequestration of polyA+ mRNAs in the nucleus while ribosomal RNAs are not affected. We discovered a conserved protein with specific apicomplexan functional properties that is essential for the survival of T. gondii. TgZNF2 may be crucial to ensure the correct polyA+ mRNA nuclear export, a function that is conserved in P. falciparum.
- Published
- 2017
28. Flowering as the Most Highly Sensitive Period of Grapevine (Vitis vinifera L. cv Mourvèdre) to the Botryosphaeria Dieback Agents Neofusicoccum parvum and Diplodia seriata Infection
- Author
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Christophe Clément, Alessandro Spagnolo, Alain Van Dorsselaer, Christine Schaeffer-Reiss, Philippe Larignon, Clara Cilindre, Agnès Hovasse, Florence Fontaine, and Maryline Magnin-Robert
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Proteomics ,Proteome ,two dimensional gel electrophoresis ,Diplodia seriata ,Article ,Catalysis ,Veraison ,lcsh:Chemistry ,Inorganic Chemistry ,defense-related proteins ,Ascomycota ,Seriata ,Tandem Mass Spectrometry ,Botany ,Electrophoresis, Gel, Two-Dimensional ,Vitis ,Physical and Theoretical Chemistry ,Botryosphaeria dieback ,lcsh:QH301-705.5 ,Molecular Biology ,Botryosphaeria ,Spectroscopy ,Plant Diseases ,Plant Proteins ,Pathogenesis-related protein ,biology ,Spots ,Organic Chemistry ,plant proteomics ,food and beverages ,General Medicine ,biology.organism_classification ,Neofusicoccum parvum ,Computer Science Applications ,lcsh:Biology (General) ,lcsh:QD1-999 ,Inflorescence ,Viticulture - Abstract
Botryosphaeria dieback is a fungal grapevine trunk disease that currently represents a threat for viticulture worldwide because of the important economical losses due to reduced yield of affected plants and their premature death. Neofusicoccum parvum and Diplodia seriata are among the causal agents. Vine green stems were artificially infected with N. parvum or D. seriata at the onset of three different phenological stages (G stage (separated clusters), flowering and veraison). Highest mean lesion lengths were recorded at flowering. Major proteome changes associated to artificial infections during the three different phenological stages were also reported using two dimensional gel electrophoresis (2D)-based analysis. Twenty (G stage), 15 (flowering) and 13 (veraison) differentially expressed protein spots were subjected to nanoLC-MS/MS and a total of 247, 54 and 25 proteins were respectively identified. At flowering, a weaker response to the infection was likely activated as compared to the other stages, and some defense-related proteins were even down regulated (e.g., superoxide dismutase, major latex-like protein, and pathogenesis related protein 10). Globally, the flowering period seemed to represent the period of highest sensitivity of grapevine to Botryosphaeria dieback agent infection, possibly being related to the high metabolic activity in the inflorescences.
- Published
- 2014
29. H2B ubiquitylation modulates spliceosome assembly and function in budding yeast
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Catherine Dargemont, Lucas Hérissant, Christine Guthrie, Diego Bertaccini, Christine Schaeffer-Reiss, Erica A. Moehle, and Alain Van Dorsselaer
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Genetics ,Spliceosome ,biology ,Exonic splicing enhancer ,Cell Biology ,General Medicine ,Methylation ,Chromatin ,Cell biology ,Histone ,RNA splicing ,biology.protein ,snRNP ,Chromatin immunoprecipitation - Abstract
Background information Commitment to splicing occurs co-transcriptionally, but a major unanswered question is the extent to which various modifications of chromatin, the template for transcription in vivo, contribute to the regulation of splicing. Results Here, we perform genome-wide analyses showing that inhibition of specific marks – H2B ubiquitylation, H3K4 methylation and H3K36 methylation – perturbs splicing in budding yeast, with each modification exerting gene-specific effects. Furthermore, semi-quantitative mass spectrometry on purified nuclear mRNPs and chromatin immunoprecipitation analysis on intron-containing genes indicated that H2B ubiquitylation, but not Set1-, Set2- or Dot1-dependent H3 methylation, stimulates recruitment of the early splicing factors, namely U1 and U2 snRNPs, onto nascent RNAs. Conclusions These results suggest that histone modifications impact splicing of distinct subsets of genes using distinct pathways.
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- 2014
30. Hb A2-Konz [δ50(D1)Ser → Thr;HBD: c.151T > A]: a New δ Chain Hemoglobin Variant Characterized by Mass Spectrometry and High Performance Liquid Chromatography
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Tchilabalo Dilezitoko Alayi, Alain Van Dorsselaer, Thomas Epting, Christine Schaeffer-Reiss, and Emmanuel Bissé
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Threonine ,Spectrometry, Mass, Electrospray Ionization ,Electrospray ,Hemoglobins, Abnormal ,Electrospray ionization ,Clinical Biochemistry ,Mutation, Missense ,Tandem mass spectrometry ,Mass spectrometry ,High-performance liquid chromatography ,Tandem Mass Spectrometry ,Serine ,Humans ,Hemoglobin A2 ,Chromatography, High Pressure Liquid ,Genetics (clinical) ,Aged ,delta-Globins ,Chromatography ,Chemistry ,Biochemistry (medical) ,Hemoglobin variants ,Hematology ,Female ,Hemoglobin - Abstract
We report a new slow-moving δ chain hemoglobin (Hb) variant, named Hb A2-Konz [δ50(D1)Ser → Thr; HBD: c.151T > A]. It was detected during simultaneous measurement of Hb A1C and Hb A2 by high resolution cation exchange high performance liquid chromatography (HPLC) using a PolyCATA column. Hb A2-Konz comprised 0.8% of total Hb. This new variant was identified by peptide mapping using nanoliquid chromatography electrospray ionization-tandem mass spectrometry (nanoLC-ESI-MS/MS) as a serine to threonine substitution at δ50(D1), indicating that the variant was due to a single base change at codon 51 (TCT > ACT) of the δ-globin gene. The new mutant is clinically silent but could lead to a misdiagnosis of β-thalassemia (β-thal) based on the level of Hb A2.
- Published
- 2014
31. Selective Irreversible Chemical Tagging of Cysteine with 3-Arylpropiolonitriles
- Author
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Alain Van Dorsselaer, Geoffray Leriche, Marc Nothisen, Rachid Baati, Jean-Marc Strub, Christine Schaeffer-Reiss, Alain Wagner, Jean-Serge Remy, Oleksandr Koniev, Conception et application de molécules bioactives (CAMB), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Spectrométrie de Masse BioOrganique [Strasbourg] (LSMBO), Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA), Laboratoire de Chimie des Systèmes Fonctionnels, Centre National de la Recherche Scientifique (CNRS), Institut Gilbert-Laustriat : Biomolécules, Biotechnologie, Innovation Thérapeutique, and Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
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animal structures ,Molecular Sequence Data ,Biomedical Engineering ,Pharmaceutical Science ,Bioengineering ,Peptide ,[CHIM.THER]Chemical Sciences/Medicinal Chemistry ,chemistry.chemical_compound ,Tandem Mass Spectrometry ,Nitriles ,Humans ,Organic chemistry ,Amino Acid Sequence ,Cysteine ,Chemoselectivity ,ComputingMilieux_MISCELLANEOUS ,Pharmacology ,chemistry.chemical_classification ,Bioconjugation ,[CHIM.ORGA]Chemical Sciences/Organic chemistry ,Organic Chemistry ,Combinatorial chemistry ,Amino acid ,Models, Chemical ,chemistry ,Reagent ,Muramidase ,Lysozyme ,Selectivity ,hormones, hormone substitutes, and hormone antagonists ,Chromatography, Liquid ,Biotechnology - Abstract
Exquisite chemoselectivity for cysteine has been found for a novel class of remarkably hydrolytically stable reagents, 3-arylpropiolonitriles (APN). The efficacy of the APN-mediated tagging was benchmarked against other cysteine-selective methodologies in a model study on a series of traceable amino acid derivatives. The selectivity of the methodology was further explored on peptide mixtures obtained by trypsin digestion of lysozyme. Additionally, the superior stability of APN-cysteine conjugates in aqueous media, human plasma, and living cells makes this new thiol-click reaction a promising methodology for applications in bioconjugation.
- Published
- 2014
32. Trafficking of the exported P. falciparum chaperone PfHsp70x
- Author
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Paul R. Gilson, Sarah C. Charnaud, Michael Lanzer, Simone Külzer, Jude M. Przyborski, Cecilia G. Sanchez, Christine Schaeffer-Reiss, Brendan S. Crabb, Benoit Westermann, Maja Strecker, Sebastian Müller, Verena Bittl, Manuel Rhiel, and Anke Tribensky
- Subjects
0301 basic medicine ,Erythrocytes ,Amino Acid Motifs ,Plasmodium falciparum ,030106 microbiology ,Protozoan Proteins ,Article ,03 medical and health sciences ,medicine ,Humans ,HSP70 Heat-Shock Proteins ,Site-directed mutagenesis ,Multidisciplinary ,biology ,Translocon ,Cell biology ,Hsp70 ,Transport protein ,Protein Transport ,Red blood cell ,Cytosol ,030104 developmental biology ,medicine.anatomical_structure ,Biochemistry ,Acetylation ,Chaperone (protein) ,biology.protein - Abstract
Plasmodium falciparum extensively modifies its chosen host cell, the mature human erythrocyte. This remodelling is carried out by parasite-encoded proteins that are exported into the host cell. To gain access to the human red blood cell, these proteins must cross the parasitophorous vacuole, a membrane bound compartment surrounding the parasite that is generated during the invasion process. Many exported proteins carry a so-called PEXEL/HT signal that directs their transport. We recently reported the unexpected finding of a species-restricted parasite-encoded Hsp70, termed PfHsp70x, which is exported into the host erythrocyte cytosol. PfHsp70x lacks a classical PEXEL/HT motif, and its transport appears to be mediated by a 7 amino acid motif directly following the hydrophobic N-terminal secretory signal. In this report, we analyse this short targeting sequence in detail. Surprisingly, both a reversed and scrambled version of the motif retained the capacity to confer protein export. Site directed mutagenesis of glutamate residues within this region leads to a block of protein trafficking within the lumen of the PV. In contrast to PEXEL-containing proteins, the targeting signal is not cleaved, but appears to be acetylated. Furthermore we show that, like other exported proteins, trafficking of PfHsp70x requires the vacuolar translocon, PTEX.
- Published
- 2016
33. Hemoglobin Kirklareli (α H58L), a New Variant Associated with Iron Deficiency and Increased CO Binding
- Author
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Tchilabalo Dilezitoko Alayi, Emmanuel Bissé, Thomas Epting, Karl Winkler, John S. Olson, Christine Schaeffer-Reiss, Premila P. Samuel, Andres S. Benitez Cardenas, Ivan Birukou, Jayashree Soman, Alain Van Dorsselaer, Freiburg University Medical Center, Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Rice University [Houston], and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
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0301 basic medicine ,Adult ,Male ,[SDV]Life Sciences [q-bio] ,Hemoglobins, Abnormal ,Mutant ,Static Electricity ,Crystallography, X-Ray ,Biochemistry ,Mass Spectrometry ,law.invention ,03 medical and health sciences ,chemistry.chemical_compound ,Young Adult ,law ,Catalytic Domain ,Humans ,Denaturation (biochemistry) ,Molecular Biology ,Heme ,Chromatography, High Pressure Liquid ,Carbon Monoxide ,Chromatography, Reverse-Phase ,biology ,Red Cell ,Anemia, Iron-Deficiency ,Active site ,Molecular Bases of Disease ,Cell Biology ,Chromatography, Ion Exchange ,3. Good health ,Oxygen ,030104 developmental biology ,chemistry ,biology.protein ,Recombinant DNA ,Female ,Hemoglobin ,Oxidation-Reduction ,Hemin - Abstract
International audience; Mutations in hemoglobin can cause a wide range of pheno-typic outcomes, including anemia due to protein instability and red cell lysis. Uncovering the biochemical basis for these phenotypes can provide new insights into hemoglobin structure and function as well as identify new therapeutic opportunities. We report here a new hemoglobin ␣ chain variant in a female patient with mild anemia, whose father also carries the trait and is from the Turkish city of Kirklareli. Both the patient and her father had a His-58(E7) 3 Leu mutation in ␣1. Surprisingly, the patient's father is not anemic, but he is a smoker with high levels of HbCO (ϳ16%). To understand these phenotypes, we examined recombinant human Hb (rHb) Kirklareli containing the ␣ H58L replacement. Mutant ␣ subunits containing Leu-58(E7) autoxidize ϳ8 times and lose hemin ϳ200 times more rapidly than native ␣ subunits, causing the oxygenated form of rHb Kirklareli to denature very rapidly under physiological conditions. The crystal structure of rHb Kirklareli shows that the ␣ H58L replacement creates a completely apolar active site, which prevents electrostatic stabilization of bound O 2 , promotes autoxidation, and enhances hemin dissociation by inhibiting water coordination to the Fe(III) atom. At the same time, the mutant ␣ subunit has an ϳ80,000-fold higher affinity for CO than O 2 , causing it to rapidly take up and retain carbon monoxide , which prevents denaturation both in vitro and in vivo and explains the phenotypic differences between the father, who is a smoker, and his daughter.
- Published
- 2016
34. In-depth glycoproteomic characterisation of grape berry vacuolar invertase using a combination of mass spectrometry-based approaches
- Author
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Christine Schaeffer-Reiss, Tchilabalo Dilezitoko Alayi, Alain Van Dorsselaer, Agnès Hovasse, Sandrine Jégou, Richard Marchal, Unité de Recherche Vigne et Vins de Champagne Stress et Environnement - EA 4707 (URVVC), Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, and Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
0106 biological sciences ,0301 basic medicine ,Glycan ,Glycosylation ,medicine.medical_treatment ,[SDV]Life Sciences [q-bio] ,Molecular Sequence Data ,Tandem mass spectrometry ,Mass spectrometry ,01 natural sciences ,Analytical Chemistry ,03 medical and health sciences ,chemistry.chemical_compound ,N-linked glycosylation ,Tandem Mass Spectrometry ,medicine ,Vitis ,Amino Acid Sequence ,ComputingMilieux_MISCELLANEOUS ,2. Zero hunger ,Wine ,Chromatography ,Protease ,beta-Fructofuranosidase ,biology ,Chemistry ,Glycopeptides ,food and beverages ,General Medicine ,carbohydrates (lipids) ,030104 developmental biology ,Invertase ,Biochemistry ,biology.protein ,010606 plant biology & botany ,Food Science - Abstract
Vacuolar invertase is a key enzyme of sugar metabolism in grape berries. A full characterisation of this highly N-glycosylated protein is required to help understand its biological and biochemical significance in grapes. We have developed a mass spectrometry (MS)-based glycoproteomic approach wherein deglycosylated peptides are analysed by LC-MS/MS, while intact glycopeptides are characterised using a dedicated MS method to determine the attachment sites and micro-heterogeneity. For grape invertase, in parallel with deglycosylated peptides analysis, different enzymatic digestions were performed and glycopeptide detection was improved by enrichment method, nanoLC-MS and oxonium glycan ions. This MS-based glycoproteomic approach demonstrates that vacuolar invertase is glycosylated at all twelve potential N-glycosylation sites. Glycosylation is heterogeneous, with twelve glycoforms identified at six of the sites. The identification of several types of N-glycans is a major result to correlate with the surface and foaming properties of wine, the solubility, allergenicity, and protease resistance of wine proteins.
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- 2016
35. Unconventional endosome-like compartment and retromer complex in Toxoplasma gondii govern parasite integrity and host infection
- Author
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Mohamed-Ali Hakimi, Frank Lafont, Elisabeth Werkmeister, Fabien Sindikubwabo, Lamba Omar Sangaré, Alain Van Dorsselaer, Tchilabalo Dilezitoko Alayi, Christian Slomianny, Isabelle Callebaut, Agnès Hovasse, Christine Schaeffer-Reiss, Benoit Westermann, Stanislas Tomavo, Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 (CIIL), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Protéomique et Peptides Modifiés (P3M), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS)-Institut Pasteur de Lille, Institute for Advanced Biosciences / Institut pour l'Avancée des Biosciences (Grenoble) (IAB), Centre Hospitalier Universitaire [Grenoble] (CHU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang - Auvergne-Rhône-Alpes (EFS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS), Institut de biologie de Lille - UMS 3702 (IBL), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physiologie Cellulaire : Canaux ioniques, inflammation et cancer - U 1003 (PHYCELL), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille, Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Laboratoire Adaptation et pathogénie des micro-organismes [Grenoble] (LAPM), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Bioimaging platform (IBL), Université de Lille, HAL UPMC, Gestionnaire, and Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
0301 basic medicine ,Genetics ,Multidisciplinary ,Retromer ,Endosome ,Science ,[SDV]Life Sciences [q-bio] ,General Physics and Astronomy ,Endocytic recycling ,General Chemistry ,Biology ,General Biochemistry, Genetics and Molecular Biology ,Transmembrane protein ,Major facilitator superfamily ,3. Good health ,Cell biology ,Retromer complex ,[SDV] Life Sciences [q-bio] ,03 medical and health sciences ,030104 developmental biology ,parasitic diseases ,Organelle biogenesis ,Biogenesis - Abstract
Membrane trafficking pathways play critical roles in Apicomplexa, a phylum of protozoan parasites that cause life-threatening diseases worldwide. Here we report the first retromer-trafficking interactome in Toxoplasma gondii. This retromer complex includes a trimer Vps35–Vps26–Vps29 core complex that serves as a hub for the endosome-like compartment and parasite-specific proteins. Conditional ablation of TgVps35 reveals that the retromer complex is crucial for the biogenesis of secretory organelles and for maintaining parasite morphology. We identify TgHP12 as a parasite-specific and retromer-associated protein with functions unrelated to secretory organelle formation. Furthermore, the major facilitator superfamily homologue named TgHP03, which is a multiple spanning and ligand transmembrane transporter, is maintained at the parasite membrane by retromer-mediated endocytic recycling. Thus, our findings highlight that both evolutionarily conserved and unconventional proteins act in concert in T. gondii by controlling retrograde transport that is essential for parasite integrity and host infection.
- Published
- 2016
36. Toxoplasma Sortilin-like Receptor Regulates Protein Transport and Is Essential for Apical Secretory Organelle Biogenesis and Host Infection
- Author
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Christine Schaeffer-Reiss, Tchilabalo Dilezitoko Alayi, Alain Van Dorsselear, Agnès Hovasse, Isabelle Callebaut, Rajshekhar Y. Gaji, Pierre-Julien Sloves, Thomas Mouveaux, Vern B. Carruthers, Stéphane Delhaye, Elisabeth Werkmeister, Christian Slomianny, Stanislas Tomavo, Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 (CIIL), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physiologie Cellulaire : Canaux ioniques, inflammation et cancer - U 1003 (PHYCELL), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille, Laboratoire de Spectrométrie de Masse BioOrganique [Strasbourg] (LSMBO), Département Sciences Analytiques et Interactions Ioniques et Biomoléculaires (DSA-IPHC), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de minéralogie et de physique des milieux condensés (IMPMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Department of Microbiology and Immunology, University of Michigan Medical School, University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Cancer Research ,Biology ,Models, Biological ,Microbiology ,Microneme ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Virology ,Immunology and Microbiology(all) ,Protein Interaction Mapping ,Animals ,Humans ,Molecular Biology ,Cells, Cultured ,030304 developmental biology ,Organelles ,Mice, Inbred BALB C ,0303 health sciences ,Rhoptry ,Membrane Proteins ,Signal transducing adaptor protein ,Survival Analysis ,Transmembrane protein ,3. Good health ,Cell biology ,Transport protein ,Adaptor Proteins, Vesicular Transport ,Protein Transport ,Toxoplasmosis, Animal ,Cytoplasm ,Female ,Parasitology ,Organelle biogenesis ,Toxoplasma ,030217 neurology & neurosurgery ,Biogenesis ,Protein Binding - Abstract
International audience; Apicomplexan parasites have an assortment of unique apical secretory organelles (rhoptries and micronemes), which have crucial functions in host infection. Here, we show that a Toxoplasma gondii sortilin-like receptor (TgSORTLR) is required for the subcellular localization and formation of apical secretory organelles.TgSORTLR is a transmembrane protein that resides within Golgi-endosomal related compartments. The lumenal domain specifically interacts with rhoptry and microneme proteins, while the cytoplasmic tail of TgSORTLR recruits cytosolic sorting machinery involved in anterograde and retrograde protein transport. Ectopic expression of the N-terminal TgSORTLR lumenal domain results in dominant negative effects with the mislocalization of both endogenous TgSORTLR as well as rhoptry and microneme proteins. Conditional ablation of TgSORTLR disrupts rhoptry and microneme biogenesis, inhibits parasite motility, and blocks both invasion into and egress from host cells. Thus, the sortilin-like receptor is essential for protein trafficking and the biogenesis of key secretory organelles in Toxoplasma.
- Published
- 2012
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37. Developing a reference system for the IFCC standardization of HbA
- Author
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Renata, Paleari, Donatella, Caruso, Patricia, Kaiser, Cristian Gabriel, Arsene, Christine, Schaeffer-Reiss, Alain, Van Dorsselaer, Emmanuel, Bissé, Maria, Ospina, Víctor R, De Jesús, Barbara, Wild, and Andrea, Mosca
- Subjects
Humans ,International Agencies ,Thalassemia ,Hemoglobin A2 ,Reference Standards ,Blood Chemical Analysis - Abstract
The importance of hemoglobin A
- Published
- 2015
38. The Circulating Protease Persephone Is an Immune Sensor for Microbial Proteolytic Activities Upstream of the Drosophila Toll Pathway
- Author
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Nicolas Matt, Najwa Issa, Florian Veillard, Emilie Lauret, Jean-Marc Reichhart, Alain Van Dorsselaer, Christine Schaeffer-Reiss, Nina Guillaumot, Modèles Insectes de l'Immunité Innée (M3I), Institut de biologie moléculaire et cellulaire (IBMC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Male ,0301 basic medicine ,Proteases ,medicine.medical_treatment ,virulence factors ,Virulence ,Immune receptor ,danger signal ,Article ,Virulence factor ,03 medical and health sciences ,0302 clinical medicine ,medicine ,[CHIM]Chemical Sciences ,Animals ,Drosophila Proteins ,Beauveria ,Receptors, Immunologic ,innate immunity ,Molecular Biology ,NF-κB pathway ,Serine protease ,bacterial proteases ,Protease ,Innate immune system ,cysteine cathepsin ,immune receptor ,biology ,Serine Endopeptidases ,Toll-Like Receptors ,Pattern recognition receptor ,cathepsin 26-29-p ,fungal proteases ,Cell Biology ,Immunity, Innate ,Cell biology ,Drosophila melanogaster ,030104 developmental biology ,clip-serine protease ,Proteolysis ,biology.protein ,Female ,Serine Proteases ,030217 neurology & neurosurgery ,Signal Transduction - Abstract
Summary Microbial or endogenous molecular patterns as well as pathogen functional features can activate innate immune systems. Whereas detection of infection by pattern recognition receptors has been investigated in details, sensing of virulence factors activities remains less characterized. In Drosophila, genetic evidences indicate that the serine protease Persephone belongs to a danger pathway activated by abnormal proteolytic activities to induce Toll signaling. However, neither the activation mechanism of this pathway nor its specificity has been determined. Here, we identify a unique region in the pro-domain of Persephone that functions as bait for exogenous proteases independently of their origin, type, or specificity. Cleavage in this bait region constitutes the first step of a sequential activation and licenses the subsequent maturation of Persephone to the endogenous cysteine cathepsin 26-29-p. Our results establish Persephone itself as an immune receptor able to sense a broad range of microbes through virulence factor activities rather than molecular patterns., Graphical Abstract, Highlights • All pathogen-secreted proteases activate the danger-sensing arm of the Toll pathway • The protease Persephone is the immune sensor for microbial proteolytic activities • A sensitive region in Persephone zymogen functions as a bait for exogenous proteases • Bait-region hydrolysis primes maturation of Persephone by the host cathepsin 26-29-p, Innate immune systems are activated by microbial molecular patterns or pathogen functional features. Issa et al. show that the Drosophila Toll pathway senses pathogen proteases through a hydrolysis-sensitive region localized in the Persephone pro-domain. Cleavage of this bait region primes maturation of Persephone and activation of the pathway by the host cathepsin 26-29-p.
- Published
- 2018
39. Characterization of Soluble and Membrane-Bound Proteins of Toxoplasma gondii as Diagnostic Markers of Infection
- Author
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Benoit Westermann, Aïda Bouratbine, F. Saghrouni, Alain Van Dorsselaer, Sami Lakhal, Moncef Ben Said, Alia Benkahla, Christine Schaeffer Reiss, and Imen Khammari
- Subjects
Gel electrophoresis ,biology ,ved/biology ,ved/biology.organism_classification_rank.species ,Acquired Toxoplasmosis ,Toxoplasma gondii ,Diagnostic marker ,biology.organism_classification ,medicine.disease ,Molecular biology ,Toxoplasmosis ,Homology (biology) ,Hammondia hammondi ,Antigen ,medicine - Abstract
In the present study, we applied the combination of one-dimensional gel electrophoresis, immunoblot and nanoliquid chromatography-tandem mass spectrometry (nanoLC-MS/MS) to identify potential immunogenic proteins of Toxoplasma gondii tachyzoites that can be used for the development of reliable assays in the serodiagnosis of acquired toxoplasmosis in immunocompetent subjects. For this purpose, we developed an immunoblot using soluble and membrane extracts of GT1 Toxoplasma gondii tachyzoites and tested 194 positive and 100 negative sera obtained from pregnant women. Five bands of soluble antigens (98 kDa, 36 kDa, 33 kDa, 32 kDa and 21 kDa) and 4 bands of membrane antigens (41 kDa, 35 kDa, 32 kDa and 30 kDa) were selected as the most valuable in terms of sensitivity and specificity. Among these bands, only 2 bands of soluble antigen (33 kDa and 32 kDa) and 2 bands of membrane antigen (32 kDa and 30 kDa) showed a specificity ≥ 90%. After mass spectrometry and bioinformatics analysis, 7 proteins were identified as potential markers for serodiagnosis of toxoplasmosis. These proteins are: SRS34A, GRA7, GRA1, DG32, MIC5, ROP5 and Toxofilin. These proteins showed a 86% to 100% homology with proteins of both VEG and ME49 strains of T. gondii and a 58% to 87% homology with Hammondia hammondi; and can be considered as attractive candidates for the development of an immunochromatography test that can be used for the rapid diagnosis of toxoplasmosis and as a confirmatory test when routine techniques give equivocal results.
- Published
- 2015
40. H2B ubiquitylation modulates spliceosome assembly and function in budding yeast
- Author
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Lucas, Hérissant, Erica A, Moehle, Diego, Bertaccini, Alain, Van Dorsselaer, Christine, Schaeffer-Reiss, Christine, Guthrie, and Catherine, Dargemont
- Subjects
Histones ,Spliceosomes ,Ubiquitination ,Saccharomyces cerevisiae ,Article - Abstract
Commitment to splicing occurs co-transcriptionally, but a major unanswered question is the extent to which various modifications of chromatin, the template for transcription in vivo, contribute to the regulation of splicing.Here, we perform genome-wide analyses showing that inhibition of specific marks - H2B ubiquitylation, H3K4 methylation and H3K36 methylation - perturbs splicing in budding yeast, with each modification exerting gene-specific effects. Furthermore, semi-quantitative mass spectrometry on purified nuclear mRNPs and chromatin immunoprecipitation analysis on intron-containing genes indicated that H2B ubiquitylation, but not Set1-, Set2- or Dot1-dependent H3 methylation, stimulates recruitment of the early splicing factors, namely U1 and U2 snRNPs, onto nascent RNAs.These results suggest that histone modifications impact splicing of distinct subsets of genes using distinct pathways.
- Published
- 2014
41. Selected Expression and Functional Importance of α4a-Tubulin in Platelet Biogenesis
- Author
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Sylvie Moog, Catherine Strassel, Carsten Janke, François Lanza, Christian Gachet, Christine Schaeffer-Reiss, Morgane Batzenschlager, Magda Mageira, Benjamin T. Kile, and Agnès Hovasse
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Gene isoform ,Immunology ,Cell Biology ,Hematology ,Biology ,Biochemistry ,Isotype ,Cell biology ,Tubulin ,Microtubule ,biology.protein ,Platelet ,Biogenesis ,Megakaryopoiesis ,Megakaryocytopoiesis - Abstract
Platelets are produced from mature megakaryocytes (MK) following a profound cellular reorganization. This includes the assembly of microtubules (MT) into a unique submenbranous coiled structure, the marginal band (MB). This process is thought to depend on a specific αβ-tubulin isotype repertoire. The MK-restricted-β1-tubulin, the predominant isoform of the MB, is already known to be important for platelet biogenesis but the implication of other isotypes is currently unknown. Our goal was to establish the αβ-tubulin repertoire in platelets and during megakaryopoiesis and to evaluate the implication of selected isotypes in platelet formation. To establish an exhaustive list of the tubulin isotypes, we used combination of RT PCR and proteomic analyses to quantify the expression of each isotype in human platelets and in human MK differentiated in culture from CD34+ hematopoietic progenitors. Information gained on the hierarchical combination of tubulin isoforms in the course of platelet biogenesis has been extended at the functional level to investigate both their role in marginal band formation and platelet functions β6-, β5- and α1c-tubulin transcripts were already present in CD34+ cells and decreased during the final stages of megakaryopoiesis. On the other hand, β1-, α4A- and α8-tubulin transcripts were only observed later during MK differentiation and in platelets. Quantitative LC-SRM mass spectrometry confirmed the predominant expression of β1 and α4A-isotypes in platelets. A functional role of the newly identified α4a-tubulin was supported by the thrombocytopenia and enlarged platelets with a decreased number of MT coils (1-3) comprising less-acetylated tubulin in mice carrying a point mutation in tuba4a. Additionally, a tendency to increased responses to several agonists was observed in these platelets. This study reveals new information on the evolution of the tubulin isotype repertoire in platelet formation pointing to a role of less-widely expressed α-isotypes. Disclosures No relevant conflicts of interest to declare.
- Published
- 2016
42. Carbon isotope characteristics of the diaromatic carotenoid, isorenieratene (intact and sulfide-bound) and a novel isomer in sediments
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Christine Schaeffer-Reiss, Philippe Schaeffer, James R. Maxwell, and Anke Putschew
- Subjects
chemistry.chemical_classification ,Isorenieratene ,Sulfide ,Double bond ,Stereochemistry ,Stable isotope ratio ,Mineralogy ,chemistry.chemical_element ,Sulfur ,chemistry.chemical_compound ,Hydrocarbon ,chemistry ,Geochemistry and Petrology ,Isotopes of carbon ,Isomerization ,Geology - Abstract
Messinian marls from evaporitic cycle IV of the Gessoso-solfifera formation (Italy) are known to contain in high abundance the diaromatic carotenoid isorenieratene of green sulfur bacterial (Chlorobiaceae) origin along with a second diaromatic carotenoid. The previous tentative assignment of the latter as a cis diastereomer of isorenieratene has now been confirmed; this indicates that double bond isomerization occurs during early diagenesis and provides further evidence for the pathway proposed previously to link isorenieratene to a number of aromatic isoprenoid hydrocarbon biomarkers. Stable carbon isotopic data confirm the Chlorobiaceae origin of the intact all-trans isorenieratene isomer and indicate that the isomerization is accompanied by little or no kinetic isotope effect. Comparison of the δ13C values of each of the isolated carotenoids (measured as isorenieratane after hydrogenation) with those of their sulfide-bound counterpart in the polar fraction of the extracts (also measured as isorenieratane) indicates that sulfurization resulted in little depletion in 13C.
- Published
- 1998
43. Stepwise chemical degradation of immature S-rich kerogens from Vena del Gesso (Italy)
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Anke Putschew, Christine Schaeffer-Reiss, James R. Maxwell, and Philippe Schaeffer
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chemistry.chemical_classification ,Sulfide ,Mineralogy ,chemistry.chemical_element ,Ether ,Medicinal chemistry ,Sulfur ,chemistry.chemical_compound ,chemistry ,Geochemistry and Petrology ,Kerogen ,Organic matter ,Ether cleavage ,Chemical decomposition ,Geology ,Macromolecule - Abstract
Stepwise chemical degradation involving cleavage of ester bonds (KOH/MeOH), sulfide and remaining ester bonds (Li/EtNH2), ether bonds (HI/LiAlH4) and sub-units linked to aromatic moieties (RuO4) has been carried out on the kerogens of two immature sulfur-rich marls (IV-1.4 and 1.8, TOC ca. 1.5%) from evaporitic cycle IV of the Gesosso-solfifera Formation (Messinian, Vena del Gesso, Italy). Up to 80% of the organic matter was converted to solvent-soluble material, with the greatest proportion released by Li/EtNH2. The majority by far of the extracts comprises polar macromolecular material which is thought to correspond to high molecular weight sub-units of the kerogen. Quantification of the small amounts (
- Published
- 1998
44. Identification of platelet factor�4 and ?-thromboglobulin by profiling and liquid chromatography tandem mass spectrometry of supernatant peptides in stored apheresis and buffy-coat platelet concentrates
- Author
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Béatrice Hechler, Christine Schaeffer-Reiss, Philippe Ohlmann, Christian Gachet, Virginie Wurtz, Alain Van Dorsselaer, Jean-Pierre Cazenave, and Hervé Isola
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Blood Platelets ,Cryopreservation ,Time Factors ,Chromatography ,Chemistry ,Plateletpheresis ,Immunology ,Hematology ,Buffy coat ,Platelet Factor 4 ,beta-Thromboglobulin ,Mass Spectrometry ,Liquid chromatography–mass spectrometry ,Humans ,Immunology and Allergy ,Platelet ,Peptides ,Platelet factor 4 ,Chromatography, Liquid - Published
- 2007
45. An improved stable isotope N-terminal labeling approach with light/heavy TMPP to automate proteogenomics data validation: dN-TOP
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Christine Schaeffer-Reiss, Sebastian Vaca, Florence Arsène-Ploetze, Alain Van Dorsselaer, Christine Carapito, and Diego Bertaccini
- Subjects
Proteomics ,Gene prediction ,In silico ,Molecular Sequence Data ,Static Electricity ,Data validation ,Computational biology ,Biochemistry ,03 medical and health sciences ,Search engine ,Protein structure ,Organophosphorus Compounds ,Bacterial Proteins ,Tandem Mass Spectrometry ,Proteobacteria ,Amino Acid Sequence ,Peptide sequence ,030304 developmental biology ,0303 health sciences ,Chromatography ,Chemistry ,030302 biochemistry & molecular biology ,General Chemistry ,Proteogenomics ,Peptide Fragments ,Protein Structure, Tertiary ,Isotope Labeling ,Chromatography, Liquid - Abstract
In silico gene prediction has proven to be prone to errors, especially regarding precise localization of start codons that spread in subsequent biological studies. Therefore, the high throughput characterization of protein N-termini is becoming an emerging challenge in the proteomics and especially proteogenomics fields. The trimethoxyphenyl phosphonium (TMPP) labeling approach (N-TOP) is an efficient N-terminomic approach that allows the characterization of both N-terminal and internal peptides in a single experiment. Due to its permanent positive charge, TMPP labeling strongly affects MS/MS fragmentation resulting in unadapted scoring of TMPP-derivatized peptide spectra by classical search engines. This behavior has led to difficulties in validating TMPP-derivatized peptide identifications with usual score filtering and thus to low/underestimated numbers of identified N-termini. We present herein a new strategy (dN-TOP) that overwhelmed the previous limitation allowing a confident and automated N-terminal peptide validation thanks to a combined labeling with light and heavy TMPP reagents. We show how this double labeling allows increasing the number of validated N-terminal peptides. This strategy represents a considerable improvement to the well-established N-TOP method with an enhanced and accelerated data processing making it now fully compatible with high-throughput proteogenomics studies.
- Published
- 2013
46. NanoLC Chips MS/MS for the characterization of N-glycopeptides generated from trypsin digestion of a monoclonal antibody
- Author
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Elsa, Wagner-Rousset, Christine, Schaeffer-Reiss, Audrey, Bednarczyk, Nathalie, Corvaïa, Alain, Van Dorsselaer, and Alain, Beck
- Subjects
Glycosylation ,Molecular Sequence Data ,Glycopeptides ,Protein Array Analysis ,Antibodies, Monoclonal ,CHO Cells ,Carbohydrate Sequence ,Tandem Mass Spectrometry ,Cricetinae ,Proteolysis ,Carbohydrate Conformation ,Animals ,Humans ,Nanotechnology ,Immunoglobulin Light Chains ,Trypsin ,Immunoglobulin Heavy Chains ,Protein Processing, Post-Translational - Abstract
In the field of therapeutic recombinant proteins, monoclonal antibodies (mAbs) have achieved a rising success with more than 30 mAbs that have reached the market in the past 20 years. From a structural standpoint, one of the most important posttranslational modifications affecting antibodies is by far glycosylation. Furthermore, glycosylation of mAbs directly impacts on their biological activity and safety and therefore needs to be well characterized. Glycoprotein analysis requires high-resolution separation techniques that can provide detailed structural analysis able to discriminate between glycoforms of various abundances. This chapter describes a protocol for nanoLC-Chip-MS/MS analysis of a proteolytic digest of the heavy chain of a recombinant mAb. The use of graphitized carbon column instead of classical C18 reversed-phase material is shown to be well suited to detect low abundant glycoforms and to provide in one shot information regarding both the oligosaccharide structure and the amino acid sequence of its peptide moiety.
- Published
- 2013
47. NanoLC Chips MS/MS for the Characterization of N-Glycopeptides Generated from Trypsin Digestion of a Monoclonal Antibody
- Author
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Christine Schaeffer-Reiss, Alain Beck, Elsa Wagner-Rousset, Audrey Bednarczyk, Alain Van Dorsselaer, and Nathalie Corvaia
- Subjects
chemistry.chemical_classification ,Glycosylation ,biology ,medicine.drug_class ,Peptide ,Oligosaccharide ,Monoclonal antibody ,Molecular biology ,law.invention ,chemistry.chemical_compound ,chemistry ,Biochemistry ,law ,biology.protein ,medicine ,Recombinant DNA ,Antibody ,Glycoprotein ,Peptide sequence - Abstract
In the field of therapeutic recombinant proteins, monoclonal antibodies (mAbs) have achieved a rising success with more than 30 mAbs that have reached the market in the past 20 years. From a structural standpoint, one of the most important posttranslational modifications affecting antibodies is by far glycosylation. Furthermore, glycosylation of mAbs directly impacts on their biological activity and safety and therefore needs to be well characterized. Glycoprotein analysis requires high-resolution separation techniques that can provide detailed structural analysis able to discriminate between glycoforms of various abundances. This chapter describes a protocol for nanoLC-Chip-MS/MS analysis of a proteolytic digest of the heavy chain of a recombinant mAb. The use of graphitized carbon column instead of classical C18 reversed-phase material is shown to be well suited to detect low abundant glycoforms and to provide in one shot information regarding both the oligosaccharide structure and the amino acid sequence of its peptide moiety.
- Published
- 2013
48. Proteomics profiling reveals novel proteins and functions of the plant stigma exudate
- Author
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María Isabel Rodríguez-García, Christine Carapito, Juan David Rejón, Juan de Dios Alché, Krzysztof Zienkiewicz, Antonio J. Castro, Christine Schaeffer-Reiss, François Delalande, Alain Van Dorsselaer, Ministerio de Ciencia e Innovación (España), Junta de Andalucía, European Commission, Centre National de la Recherche Scientifique (France), and Agence Nationale de la Recherche (France)
- Subjects
Exudate ,Proteomics ,Programmed cell death ,Pollination ,Physiology ,secretome ,Plant Exudates ,Plant Science ,Flowers ,Pollen Tube ,Biology ,medicine.disease_cause ,olive ,Cell Wall ,Polysaccharides ,Pollen ,Olea ,Botany ,medicine ,Extracellular ,Plant Proteins ,Secretome ,Olive ,exudate ,Eastern lily ,Cell biology ,Stigma ,Secretory protein ,stigma ,Pollen tube ,Lilium ,medicine.symptom ,Research Paper - Abstract
Proteomic analysis of the stigmatic exudate of Lilium longiflorum and Olea europaea led to the identification of 51 and 57 proteins, respectively, most of which are described for the first time in this secreted fluid. These results indicate that the stigmatic exudate is an extracellular environment metabolically active, participating in at least 80 different biological processes and 97 molecular functions. The stigma exudate showed a markedly catabolic profile and appeared to possess the enzyme machinery necessary to degrade large polysaccharides and lipids secreted by papillae to smaller units, allowing their incorporation into the pollen tube during pollination. It may also regulate pollen-tube growth in the pistil through the selective degradation of tube-wall components. Furthermore, some secreted proteins were involved in pollen-tube adhesion and orientation, as well as in programmed cell death of the papillae cells in response to either compatible pollination or incompatible pollen rejection. Finally, the results also revealed a putative cross-talk between genetic programmes regulating stress/defence and pollination responses in the stigma., This work was supported by the Spanish Ministry of Science and Innovation (ERDF-cofinanced projects AGL2008-00517 and PIE-200840I186) and Junta de Andalucía (ERDF-cofinanced project P2010-CVI5767). This work was also funded by the CNRS, the ‘Agence National de la Recherche’ (ANR) and the ‘Region Alsace’. JDR thanks the MICIIN for providing FPU grant funding.
- Published
- 2013
49. Toxoplasma transcription factor TgAP2XI-5 regulates the expression of genes involved in parasite virulence and host invasion
- Author
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Guillemette Marot, Tchilabalo Dilezitoko Alayi, Mathieu Gissot, Ludovic Huot, Robert A. Walker, Alain Van Dorsselaer, David Hot, Kami Kim, Stanislas Tomavo, Christine Schaeffer-Reiss, Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 (CIIL), Centre National de la Recherche Scientifique (CNRS)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP), Université de Strasbourg (UNISTRA), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), MOdel for Data Analysis and Learning (MODAL), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Paul Painlevé - UMR 8524 (LPP), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Evaluation des technologies de santé et des pratiques médicales - ULR 2694 (METRICS), Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-École polytechnique universitaire de Lille (Polytech Lille)-Université de Lille, Sciences et Technologies, Evaluation des technologies de santé et des pratiques médicales - ULR 2694 (METRICS), Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille, Albert Einstein College of Medicine [New York], Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Paul Painlevé (LPP), Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université de Lille, Sciences et Technologies-Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Evaluation des technologies de santé et des pratiques médicales - ULR 2694 (METRICS), Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-École polytechnique universitaire de Lille (Polytech Lille), and Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)
- Subjects
TBX1 ,Transcription, Genetic ,animal diseases ,[SDV]Life Sciences [q-bio] ,Genes, Protozoan ,Protozoan Proteins ,Virulence ,Biology ,Response Elements ,Biochemistry ,03 medical and health sciences ,parasitic diseases ,Gene Regulation ,Molecular Biology ,Transcription factor ,030304 developmental biology ,Genetics ,Regulation of gene expression ,0303 health sciences ,Rhoptry ,General transcription factor ,030306 microbiology ,fungi ,Promoter ,Cell Biology ,TCF4 ,Cell biology ,Gene Expression Regulation ,Toxoplasma ,Toxoplasmosis ,Transcription Factors - Abstract
International audience; Gene regulation in apicomplexan parasites, a phylum containing important protozoan parasites such as Plasmodium and Toxoplasma, is poorly understood. The life cycle of T. gondii is complex, with multiple proliferation and differentiation steps of which tachyzoite proliferation is the most relevant to pathogenesis in humans and animals. Tachyzoites express invasion and virulence factors that are crucial for their survival and manipulation of host cell functions. The expression of those factors is tightly controlled during the tachyzoite cell cycle to permit their correct packaging in newly formed apical secretory organelles named micronemes and rhoptries in the daughter cells. However, little is known about the factors that control the expression of genes encoding the virulence factors present in these parasite-specific secretory organelles. We report that the plant-like nuclear factor TgAP2XI-5 targets more than 300 gene promoters and actively controls the transcription of these genes. Most of these target genes, including those that are essential for parasite virulence, showed a peak of expression in S and M phases of the cell cycle. Furthermore, we identified the cis-regulatory element recognized by TgAP2XI-5 and demonstrated its ability to actively drive gene transcription. Our results demonstrated that TgAP2XI-5 is a novel DNA sequence-specific transcription factor associated with promoter activation. TgAP2XI-5 may regulate gene transcription of crucial virulence factors in T. gondii.
- Published
- 2013
50. An evolutionary conserved zinc finger protein is involved inToxoplasma gondiimRNA nuclear export
- Author
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Agnès Hovasse, Laurent Chaloin, Christine Schaeffer-Reiss, Mathieu Gissot, Alain Van Dorsselaer, and Stanislas Tomavo
- Subjects
0301 basic medicine ,Zinc finger ,Spliceosomal complex ,Genetics ,030102 biochemistry & molecular biology ,Immunology ,Biology ,Microbiology ,3. Good health ,Complementation ,03 medical and health sciences ,Cell nucleus ,030104 developmental biology ,medicine.anatomical_structure ,Virology ,parasitic diseases ,RNA splicing ,Gene expression ,medicine ,Nuclear export signal ,Gene - Abstract
Apicomplexan parasites are responsible for some of the most deadly parasitic diseases affecting humans and livestock. There is an urgent need for new medicines that will target apicomplexan-specific pathways. We characterized a Toxoplasma gondii C2H2 zinc finger protein, named TgZNF2, which is conserved among eukaryotes. We constructed an inducible KO strain (iKO-TgZNF2) for this gene where the tgznf2 gene expression is repressed in the presence of a tetracycline analog (ATc). We showed that the iKO-TgZNF2 parasites are unable to proliferate after depletion of the TgZNF2 protein. Complementation with a full length copy of the gene restores the phenotype Moreover, the homolog of this protein in the related apicomplexan Plasmodium falciparum was shown to efficiently rescue the phenotype, suggesting that this pathway is likely conserved among apicomplexan parasites. We demonstrated that the iKO-mutant lacking TgZNF2 are arrested during the cell cycle during the G1 phase. We identified potential protein partners of this protein among which are spliceosomal complex and mRNA nuclear export components. We confirmed that TgZNF2 is able to bind in vivo to transcripts but splicing is not perturbed in the ATc-treated parasites. Instead, we demonstrated that TgZNF2 depletion leads to the sequestration of polyA+ mRNAs in the nucleus while ribosomal RNAs are not affected. We discovered a conserved protein with specific apicomplexan functional properties that is essential for the survival of T. gondii. TgZNF2 may be crucial to ensure the correct polyA+ mRNA nuclear export, a function that is conserved in P. falciparum.
- Published
- 2016
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