73 results on '"Littmann M"'
Search Results
2. Latent class analysis of diagnostic tests for adenovirus, Bordetella pertussis and influenza virus infections in German adults with longer lasting coughs
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SOBOTZKI, C., RIFFELMANN, M., KENNERKNECHT, N., HÜLSSE, C., LITTMANN, M., WHITE, A., VON KRIES, R., and VON KÖNIG, C. H. WIRSING
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- 2016
3. Antibody decay after immunisation of health-care workers with an acellular pertussis vaccine
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Riffelmann, M., Littmann, M., Hülße, C., and Wirsing von König, C. H.
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- 2009
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4. Factors affecting core losses in oriented electrical steels at moderate inductions (invited).
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Foster, K. and Littmann, M. F.
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SILICON steel , *STRAINS & stresses (Mechanics) , *ELECTROMAGNETIC induction - Abstract
Presents a study which reviewed the effects of sheet thickness, orientation, grain size, silicon content, stress, domain control and surface condition on core losses of both regular grain oriented and high permeability silicon steels at moderate inductions. Background on power and distribution transformer design; Materials and methods used; Findings.
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- 1985
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5. Effect of composition and original orientation on secondary recrystallization of 3% silicon-iron single crystals.
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Littmann, M. F. and Dahlstrom, N. A.
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- 1978
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6. Structures and Magnetic Properties of Grain-Oriented 3.2% Silicon-Iron.
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Littmann, M. F.
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- 1967
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7. Impact of community-acquired pediatric rotavirus gastroenteritis on family life: data from the REVEAL study
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Van der Wielen, M, Giaquinto, Carlo, Gothefors, L, Huelsse, C, Huet, F, Littmann, M, Maxwell, M, Talayero, Jm, Todd, P, Vila, Mt, Cantarutti, L, Van Damme, P, DA DALT, Liviana, and REVEAL Study Group, .
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Male ,medicine.medical_specialty ,Pediatrics ,family ,cost of illness ,communicable disease ,medicine.disease_cause ,preschool child ,Rotavirus Infections ,absenteeism ,Rotavirus ,Research article ,Epidemiology ,medicine ,Humans ,Prospective Studies ,human ,child care ,lcsh:R5-920 ,Communicable disease ,psychological aspect ,business.industry ,Public health ,Incidence (epidemiology) ,Infant ,economics ,Emergency department ,Rotavirus infection ,Family life ,virology ,Community-Acquired Infections ,Europe ,gastroenteritis ,Child, Preschool ,Female ,Observational study ,Human medicine ,Family Practice ,business ,lcsh:Medicine (General) - Abstract
Background Rotavirus is the leading cause of acute gastroenteritis (AGE) and the most frequent cause of severe diarrhoea in children aged less than 5 years. Although the epidemiology of rotavirus gastroenteritis (RVGE) is well documented, there are few data on the impact of RVGE on the families of affected children. Methods Data associated with the burden of RVGE, including number of working days lost, levels of parental stress, the need for alternative childcare arrangements and additional nappies used, were extracted from questionnaires completed by parents of children participating in a prospective, multicentre, observational study (Rotavirus gastroenteritis Epidemiology and Viral types in Europe Accounting for Losses in public health and society, REVEAL), conducted during 2004-2005 in selected areas of Belgium, France, Germany, Italy, Spain, Sweden, and the United Kingdom to estimate the incidence of RVGE in children aged less than 5 years seeking medical care as a result of AGE. Results 1102 children with RVGE were included in the present analysis. The proportion of RVGE cases that required at least one parent or other person to be absent from work was 39%-91% in the hospital setting, 44%-64% in the emergency department, and 20%-64% in primary care. Self-reported levels of parental stress were generally high (mean stress levels, ≥ 5 on a 10-point visual analogue scale). Additional childcare arrangements were required in up to 21% of RVGE episodes. The mean number of nappies used per day during RVGE episodes was approximately double that used when the child was not ill. Conclusions Paediatric RVGE cases cause disruption to families and parental stress. The burden of RVGE on children and their families could be substantially reduced by routine rotavirus vaccination of infants.
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- 2010
8. Growth of cubic InxGa1-xN over whole composition by MBE.
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Zscherp, M. F., Jentsch, S. A., Müller, M. J., Littmann, M., Meier, F., Hofmann, D. M., As, D. J., Chatterjee, S., and Schörmann, J.
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- 2023
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9. Secondary Recrystallization and Its Relation to Magnetic Properties in Thin Grain-Oriented 3% Silicon-Iron.
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Littmann, M. F.
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- 1965
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10. Iron and silicon-iron alloys.
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Littmann, M.
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- 1971
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11. Grain-Size Effects in Oriented 48% Nickel-Iron Cores at 400 Cycles.
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Littmann, M. F., Harris, E. S., and Ward, C. E.
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- 1962
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12. Cube Texture in Body Centered Magnetic Alloys.
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Wiener, G., Albert, P. A., Trapp, R. H., and Littmann, M. F.
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- 1958
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13. Survey of Protective Measures and H5N1-Seroprevalence Among Bird Collectors During An Avian Influenza A/H5N1 Outbreak on Ruegen, Germany, February-March 2006
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Cai, W., Schweiger, B., Buchholz, U., Buda, S., Littmann, M., Heusler, J., and Haas, W.
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- 2008
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14. Core loss of grain-oriented 3% silicon-iron at high inductions.
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Littmann, M. F.
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- 1975
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15. Where is Planet X?
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Littmann, M.
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PLANETS - Abstract
Discusses the search for a possible tenth planet, Planet X, which could account for the irregularities in the motion of Uranus and Neptune. Van Flandern & Harrington; Powell; Gomes and Ferraz-Mello; Problems with data.
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- 1989
16. The triumphant grand tour of `Voyager 2.'
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Littmann, M.
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SPACE probes - Abstract
The flight of NASA's `Voyager 2' to the outer planets of the solar system reaches its final destination next August when the spacecraft flies by Neptune. Discusses the mission's beginnings and the tribulations it has endured.
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- 1988
17. Impact of community-acquired paediatric rotavirus gastroenteritis on family life: data from the REVEAL study
- Author
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Talayero José MP, Maxwell Melanie, Littmann Martina, Huet Frédéric, Huelsse Christel, Gothefors Leif, Giaquinto Carlo, Van der Wielen Marie, Todd Peter, Vila Miguel T, Cantarutti Luigi, and Van Damme Pierre
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Medicine (General) ,R5-920 - Abstract
Abstract Background Rotavirus is the leading cause of acute gastroenteritis (AGE) and the most frequent cause of severe diarrhoea in children aged less than 5 years. Although the epidemiology of rotavirus gastroenteritis (RVGE) is well documented, there are few data on the impact of RVGE on the families of affected children. Methods Data associated with the burden of RVGE, including number of working days lost, levels of parental stress, the need for alternative childcare arrangements and additional nappies used, were extracted from questionnaires completed by parents of children participating in a prospective, multicentre, observational study (Rotavirus gastroenteritis Epidemiology and Viral types in Europe Accounting for Losses in public health and society, REVEAL), conducted during 2004-2005 in selected areas of Belgium, France, Germany, Italy, Spain, Sweden, and the United Kingdom to estimate the incidence of RVGE in children aged less than 5 years seeking medical care as a result of AGE. Results 1102 children with RVGE were included in the present analysis. The proportion of RVGE cases that required at least one parent or other person to be absent from work was 39%-91% in the hospital setting, 44%-64% in the emergency department, and 20%-64% in primary care. Self-reported levels of parental stress were generally high (mean stress levels, ≥ 5 on a 10-point visual analogue scale). Additional childcare arrangements were required in up to 21% of RVGE episodes. The mean number of nappies used per day during RVGE episodes was approximately double that used when the child was not ill. Conclusions Paediatric RVGE cases cause disruption to families and parental stress. The burden of RVGE on children and their families could be substantially reduced by routine rotavirus vaccination of infants.
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- 2010
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18. Protective measures and H5N1-seroprevalence among personnel tasked with bird collection during an outbreak of avian influenza A/H5N1 in wild birds, Ruegen, Germany, 2006
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Littmann Martina, Buda Silke, Buchholz Udo, Schweiger Brunhilde, Cai Wei, Heusler Jörg, and Haas Walter
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Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background In Germany, the first outbreak of highly pathogenic avian influenza A/H5N1 occurred among wild birds on the island of Ruegen between February and April 2006. The aim of this study was to investigate the use of recommended protective measures and to measure H5N1-seroprevalence among personnel tasked with bird collection. Methods Inclusion criteria of our study were participation in collecting wild birds on Ruegen between February and March 2006. Study participants were asked to complete a questionnaire, and to provide blood samples. For evaluation of the use of protective measures, we developed a personal protective equipment (PPE)-score ranging between 0 and 9, where 9 corresponds to a consistent and complete use of PPE. Sera were tested by plaque neutralization (PN) and microneutralization (MN) assays. Reactive sera were reanalysed in the World Health Organization-Collaborating Centre (WHO-CC) using MN assay. Results Of the eligible personnel, consisting of firemen, government workers and veterinarians, 61% (97/154) participated in the study. Of those, 13% reported having always worn all PPE-devices during bird collection (PPE-score: 9). Adherence differed between firemen (mean PPE-score: 6.6) and government workers (mean PPE-score: 4.5; p = 0.006). The proportion of personnel always adherent to wearing PPE was lowest for masks (19%). Of the participants, 18% had received seasonal influenza vaccination prior to the outbreak. There were no reports of influenza-like illness. Five sera initially H5-reactive by PN assay were negative by WHO-CC confirmatory testing. Conclusion Gaps and variability in adherence demonstrate the risk of exposure to avian influenza under conditions of wild bird collection, and justify serological testing and regular training of task personnel.
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- 2009
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19. The epidemiology of pertussis in Germany: past and present
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Oppermann Hanna, Meyer Christiane, Littmann Martina, Jensen Evelin, Beier Dietmar, Hellenbrand Wiebke, Wirsing von König Carl-Heinz, and Reiter Sabine
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Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background Current and past pertussis epidemiology in the two parts of Germany is compared in the context of different histories of vaccination recommendations and coverage to better understand patterns of disease transmission. Methods Available regional pertussis surveillance and vaccination coverage data, supplemented by a literature search for published surveys as well as official national hospital and mortality statistics, were analyzed in the context of respective vaccination recommendations from 1964 onwards. Results Routine childhood pertussis vaccination was recommended in the German Democratic Republic (GDR) from 1964 and in former West German states (FWG) from 1969, but withdrawn from 1974–1991 in FWG. Pertussis incidence declined to Conclusion The shift in pertussis morbidity to older age groups observed in FEG is similar to reports from other countries with longstanding vaccination programs and suggests that additional booster vaccination may be necessary beyond adolescence. The high proportion of fully vaccinated cases in older children in FEG suggests waning immunity 5–10 years after primary immunisation in infancy. The higher incidence of pertussis hospitalisations in infants suggests a stronger force of infection in FWG than FEG. Nationwide pertussis reporting is required for better evaluation of transmission patterns and vaccination policy in both parts of Germany.
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- 2009
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20. The epidemiology of pertussis in Germany: past and present.
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Hellenbrand W, Beier D, Jensen E, Littmann M, Meyer C, Oppermann H, Wirsing von König CH, Reiter S, Hellenbrand, Wiebke, Beier, Dietmar, Jensen, Evelin, Littmann, Martina, Meyer, Christiane, Oppermann, Hanna, Wirsing von König, Carl-Heinz, and Reiter, Sabine
- Abstract
Background: Current and past pertussis epidemiology in the two parts of Germany is compared in the context of different histories of vaccination recommendations and coverage to better understand patterns of disease transmission.Methods: Available regional pertussis surveillance and vaccination coverage data, supplemented by a literature search for published surveys as well as official national hospital and mortality statistics, were analyzed in the context of respective vaccination recommendations from 1964 onwards.Results: Routine childhood pertussis vaccination was recommended in the German Democratic Republic (GDR) from 1964 and in former West German states (FWG) from 1969, but withdrawn from 1974-1991 in FWG. Pertussis incidence declined to <1 case/100,000 inhabitants in GDR prior to reunification in 1991, while in FWG, where pertussis was not notifiable after 1961, incidence was estimated at 160-180 cases/100,000 inhabitants in the 1970s-1980s. Despite recommendations for universal childhood immunization in 1991, vaccination coverage decreased in former East German States (FEG) and increased only slowly in FWG. After introduction of acellular pertussis vaccines in 1995, vaccination coverage increased markedly among younger children, but remains low in adolescents, especially in FWG, despite introduction of a booster vaccination for 9-17 year olds in 2000. Reported pertussis incidence increased in FEG to 39.3 cases/100,000 inhabitants in 2007, with the proportion of adults increasing from 20% in 1995 to 68% in 2007. From 2004-2007, incidence was highest among 5-14 year-old children, with a high proportion fully vaccinated according to official recommendations, which did not include a preschool booster until 2006. Hospital discharge statistics revealed a ~2-fold higher pertussis morbidity among infants in FWG than FEG.Conclusion: The shift in pertussis morbidity to older age groups observed in FEG is similar to reports from other countries with longstanding vaccination programs and suggests that additional booster vaccination may be necessary beyond adolescence. The high proportion of fully vaccinated cases in older children in FEG suggests waning immunity 5-10 years after primary immunisation in infancy. The higher incidence of pertussis hospitalisations in infants suggests a stronger force of infection in FWG than FEG. Nationwide pertussis reporting is required for better evaluation of transmission patterns and vaccination policy in both parts of Germany. [ABSTRACT FROM AUTHOR]- Published
- 2009
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21. ChemInform Abstract: The Chemistry and Stereochemistry of Carpropamid (KTU 3616).
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Kraatz, U. and Littmann, M.
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- 1999
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22. 2, 6-dicyan-1, 5-dimethyl-semibullvalen
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Askani, R and Littmann, M
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- 1982
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23. Ultrasound guided biopsy of the pleura
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Seitz, K. and Littmann, M.
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- 1996
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24. CUBE TEXTURE IN BODY CENTERED MAGNETIC ALLOYS
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Littmann, M
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- 1958
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25. First Results from a Broadband Search for Dark Photon Dark Matter in the 44 to 52 μeV Range with a Coaxial Dish Antenna.
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Knirck S, Hoshino G, Awida MH, Cancelo GI, Di Federico M, Knepper B, Lapuente A, Littmann M, Miller DW, Mitchell DV, Rodriguez D, Ruschman MK, Sawtell MA, Stefanazzi L, Sonnenschein A, Teafoe GW, Bowring D, Carosi G, Chou A, Chang CL, Dona K, Khatiwada R, Kurinsky NA, Liu J, Pena C, Salemi CP, Wang CW, and Yu J
- Abstract
We present first results from a dark photon dark matter search in the mass range from 44 to 52 μeV (10.7-12.5 GHz) using a room-temperature dish antenna setup called GigaBREAD. Dark photon dark matter converts to ordinary photons on a cylindrical metallic emission surface with area 0.5 m^{2} and is focused by a novel parabolic reflector onto a horn antenna. Signals are read out with a low-noise receiver system. A first data taking run with 24 days of data does not show evidence for dark photon dark matter in this mass range, excluding dark photon photon mixing parameters χ≳10^{-12} in this range at 90% confidence level. This surpasses existing constraints by about 2 orders of magnitude and is the most stringent bound on dark photons in this range below 49 μeV.
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- 2024
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26. Overcoming the Miscibility Gap of GaN/InN in MBE Growth of Cubic In x Ga 1- x N.
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Zscherp MF, Jentsch SA, Müller MJ, Lider V, Becker C, Chen L, Littmann M, Meier F, Beyer A, Hofmann DM, As DJ, Klar PJ, Volz K, Chatterjee S, and Schörmann J
- Abstract
The lack of internal polarization fields in cubic group-III nitrides makes them promising arsenic-free contenders for next-generation high-performance electronic and optoelectronic applications. In particular, cubic In
x Ga1- x N semiconductor alloys promise band gap tuning across and beyond the visible spectrum, from the near-ultraviolet to the near-infrared. However, realization across the complete composition range has been deemed impossible due to a miscibility gap corresponding to the amber spectral range. In this study, we use plasma-assisted molecular beam epitaxy (PAMBE) to fabricate cubic Inx Ga1- x N films on c-GaN/AlN/3C-SiC/Si template substrates that overcome this challenge by careful adjustment of the growth conditions, conclusively closing the miscibility gap. X-ray diffraction reveals the composition, phase purity, and strain properties of the Inx Ga1- x N films. Scanning transmission electron microscopy reveals a CuPt-type ordering on the atomistic scale in highly alloyed films with x (In) ≈ 0.5. Layers with much lower and much higher indium content exhibit statistical distributions of the cations Ga and In. Notably, this CuPt-type ordering results in a spectrally narrower emission compared to that of statistically disordered zincblende materials. The emission energies of the films range from 3.24 to 0.69 eV and feature a quadratic bowing parameter of b = 2.4 eV. In contrast, the LO-like phonon modes that are observed by Raman spectroscopy exhibit a one-mode behavior and shift linearly from c-GaN to c-InN.- Published
- 2023
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27. Novel machine learning approaches revolutionize protein knowledge.
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Bordin N, Dallago C, Heinzinger M, Kim S, Littmann M, Rauer C, Steinegger M, Rost B, and Orengo C
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- Computational Biology methods, Protein Conformation, Proteins chemistry, Machine Learning
- Abstract
Breakthrough methods in machine learning (ML), protein structure prediction, and novel ultrafast structural aligners are revolutionizing structural biology. Obtaining accurate models of proteins and annotating their functions on a large scale is no longer limited by time and resources. The most recent method to be top ranked by the Critical Assessment of Structure Prediction (CASP) assessment, AlphaFold 2 (AF2), is capable of building structural models with an accuracy comparable to that of experimental structures. Annotations of 3D models are keeping pace with the deposition of the structures due to advancements in protein language models (pLMs) and structural aligners that help validate these transferred annotations. In this review we describe how recent developments in ML for protein science are making large-scale structural bioinformatics available to the general scientific community., Competing Interests: Declaration of interests No interests are declared., (Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
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- 2023
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28. AlphaFold2 reveals commonalities and novelties in protein structure space for 21 model organisms.
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Bordin N, Sillitoe I, Nallapareddy V, Rauer C, Lam SD, Waman VP, Sen N, Heinzinger M, Littmann M, Kim S, Velankar S, Steinegger M, Rost B, and Orengo C
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- Humans, Databases, Protein, Furylfuramide, Proteins chemistry
- Abstract
Deep-learning (DL) methods like DeepMind's AlphaFold2 (AF2) have led to substantial improvements in protein structure prediction. We analyse confident AF2 models from 21 model organisms using a new classification protocol (CATH-Assign) which exploits novel DL methods for structural comparison and classification. Of ~370,000 confident models, 92% can be assigned to 3253 superfamilies in our CATH domain superfamily classification. The remaining cluster into 2367 putative novel superfamilies. Detailed manual analysis on 618 of these, having at least one human relative, reveal extremely remote homologies and further unusual features. Only 25 novel superfamilies could be confirmed. Although most models map to existing superfamilies, AF2 domains expand CATH by 67% and increases the number of unique 'global' folds by 36% and will provide valuable insights on structure function relationships. CATH-Assign will harness the huge expansion in structural data provided by DeepMind to rationalise evolutionary changes driving functional divergence., (© 2023. The Author(s).)
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- 2023
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29. CATHe: detection of remote homologues for CATH superfamilies using embeddings from protein language models.
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Nallapareddy V, Bordin N, Sillitoe I, Heinzinger M, Littmann M, Waman VP, Sen N, Rost B, and Orengo C
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- Humans, Sequence Homology, Amino Acid, Databases, Protein, Proteins chemistry, Algorithms
- Abstract
Motivation: CATH is a protein domain classification resource that exploits an automated workflow of structure and sequence comparison alongside expert manual curation to construct a hierarchical classification of evolutionary and structural relationships. The aim of this study was to develop algorithms for detecting remote homologues missed by state-of-the-art hidden Markov model (HMM)-based approaches. The method developed (CATHe) combines a neural network with sequence representations obtained from protein language models. It was assessed using a dataset of remote homologues having less than 20% sequence identity to any domain in the training set., Results: The CATHe models trained on 1773 largest and 50 largest CATH superfamilies had an accuracy of 85.6 ± 0.4% and 98.2 ± 0.3%, respectively. As a further test of the power of CATHe to detect more remote homologues missed by HMMs derived from CATH domains, we used a dataset consisting of protein domains that had annotations in Pfam, but not in CATH. By using highly reliable CATHe predictions (expected error rate <0.5%), we were able to provide CATH annotations for 4.62 million Pfam domains. For a subset of these domains from Homo sapiens, we structurally validated 90.86% of the predictions by comparing their corresponding AlphaFold2 structures with structures from the CATH superfamilies to which they were assigned., Availability and Implementation: The code for the developed models is available on https://github.com/vam-sin/CATHe, and the datasets developed in this study can be accessed on https://zenodo.org/record/6327572., Supplementary Information: Supplementary data are available at Bioinformatics online., (© The Author(s) 2023. Published by Oxford University Press.)
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- 2023
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30. LambdaPP: Fast and accessible protein-specific phenotype predictions.
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Olenyi T, Marquet C, Heinzinger M, Kröger B, Nikolova T, Bernhofer M, Sändig P, Schütze K, Littmann M, Mirdita M, Steinegger M, Dallago C, and Rost B
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- Amino Acid Sequence, Protein Structure, Secondary, Sequence Alignment, Software, Artificial Intelligence, Proteins chemistry
- Abstract
The availability of accurate and fast artificial intelligence (AI) solutions predicting aspects of proteins are revolutionizing experimental and computational molecular biology. The webserver LambdaPP aspires to supersede PredictProtein, the first internet server making AI protein predictions available in 1992. Given a protein sequence as input, LambdaPP provides easily accessible visualizations of protein 3D structure, along with predictions at the protein level (GeneOntology, subcellular location), and the residue level (binding to metal ions, small molecules, and nucleotides; conservation; intrinsic disorder; secondary structure; alpha-helical and beta-barrel transmembrane segments; signal-peptides; variant effect) in seconds. The structure prediction provided by LambdaPP-leveraging ColabFold and computed in minutes-is based on MMseqs2 multiple sequence alignments. All other feature prediction methods are based on the pLM ProtT5. Queried by a protein sequence, LambdaPP computes protein and residue predictions almost instantly for various phenotypes, including 3D structure and aspects of protein function. LambdaPP is freely available for everyone to use under embed.predictprotein.org, the interactive results for the case study can be found under https://embed.predictprotein.org/o/Q9NZC2. The frontend of LambdaPP can be found on GitHub (github.com/sacdallago/embed.predictprotein.org), and can be freely used and distributed under the academic free use license (AFL-2). For high-throughput applications, all methods can be executed locally via the bio-embeddings (bioembeddings.com) python package, or docker image at ghcr.io/bioembeddings/bio_embeddings, which also includes the backend of LambdaPP., (© 2022 The Authors. Protein Science published by Wiley Periodicals LLC on behalf of The Protein Society.)
- Published
- 2023
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31. Contrastive learning on protein embeddings enlightens midnight zone.
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Heinzinger M, Littmann M, Sillitoe I, Bordin N, Orengo C, and Rost B
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Experimental structures are leveraged through multiple sequence alignments, or more generally through homology-based inference (HBI), facilitating the transfer of information from a protein with known annotation to a query without any annotation. A recent alternative expands the concept of HBI from sequence-distance lookup to embedding-based annotation transfer (EAT). These embeddings are derived from protein Language Models (pLMs). Here, we introduce using single protein representations from pLMs for contrastive learning. This learning procedure creates a new set of embeddings that optimizes constraints captured by hierarchical classifications of protein 3D structures defined by the CATH resource. The approach, dubbed ProtTucker , has an improved ability to recognize distant homologous relationships than more traditional techniques such as threading or fold recognition. Thus, these embeddings have allowed sequence comparison to step into the 'midnight zone' of protein similarity, i.e. the region in which distantly related sequences have a seemingly random pairwise sequence similarity. The novelty of this work is in the particular combination of tools and sampling techniques that ascertained good performance comparable or better to existing state-of-the-art sequence comparison methods. Additionally, since this method does not need to generate alignments it is also orders of magnitudes faster. The code is available at https://github.com/Rostlab/EAT., (© The Author(s) 2022. Published by Oxford University Press on behalf of NAR Genomics and Bioinformatics.)
- Published
- 2022
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32. Impact of Changes in Infection Control Measures on the Dynamics of COVID-19 Infections in Schools and Pre-schools.
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Sombetzki M, Lücker P, Ehmke M, Bock S, Littmann M, Reisinger EC, Hoffmann W, and Kästner A
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- Adult, Child, Child, Preschool, Disease Outbreaks prevention & control, Germany, Humans, Masks, Prospective Studies, SARS-CoV-2, COVID-19 prevention & control, Communicable Disease Control methods, Schools
- Abstract
Introduction: With the increased emergence of SARS-CoV-2 variants, the impact on schools and preschools remains a matter of debate. To ensure that schools and preschools are kept open safely, the identification of factors influencing the extent of outbreaks is of importance. Aim: To monitor dynamics of COVID-19 infections in schools and preschools and identify factors influencing the extent of outbreaks. Methods: In this prospective observational study we analyzed routine surveillance data of Mecklenburg-Western Pomerania, Germany, from calendar week (CW) 32, 2020 to CW19, 2021 regarding SARS-CoV-2 infection events in schools and preschools considering changes in infection control measures over time. A multivariate linear regression model was fitted to evaluate factors influencing the number of students, teachers and staff tested positive following index cases in schools and preschools. Due to an existing multicollinearity in the common multivariate regression model between the variables "face mask obligation for children" and "face mask obligation for adults", two further separate regression models were set up (Multivariate Model Adults and Multivariate Model Children). Results: We observed a significant increase in secondary cases in preschools in the first quarter of 2021 (CW8 to CW15, 2021), and simultaneously a decrease in secondary cases in schools. In multivariate regression analysis, the strongest predictor of the extent of the outbreaks was the teacher/ caregiver mask obligation ( B = -1.9; 95% CI: -2.9 to -1.0; p < 0.001). Furthermore, adult index cases (adult only or child+adult combinations) increased the likelihood of secondary cases ( B = 1.3; 95% CI: 0.9 to 1.8; p < 0.001). The face mask obligation for children also showed a significant reduction in the number of secondary cases ( B = -0.6; 95% CI: -0.9 to -0.2; p = 0.004. Conclusion: The present study indicates that outbreak events at schools and preschools are effectively contained by an obligation for adults and children to wear face masks., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Sombetzki, Lücker, Ehmke, Bock, Littmann, Reisinger, Hoffmann and Kästner.)
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- 2021
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33. Protein embeddings and deep learning predict binding residues for various ligand classes.
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Littmann M, Heinzinger M, Dallago C, Weissenow K, and Rost B
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- Binding Sites, Ligands, Metals chemistry, Nucleic Acids chemistry, Protein Binding, Protein Conformation, Software, Deep Learning, Molecular Docking Simulation methods, Sequence Analysis, Protein methods
- Abstract
One important aspect of protein function is the binding of proteins to ligands, including small molecules, metal ions, and macromolecules such as DNA or RNA. Despite decades of experimental progress many binding sites remain obscure. Here, we proposed bindEmbed21, a method predicting whether a protein residue binds to metal ions, nucleic acids, or small molecules. The Artificial Intelligence (AI)-based method exclusively uses embeddings from the Transformer-based protein Language Model (pLM) ProtT5 as input. Using only single sequences without creating multiple sequence alignments (MSAs), bindEmbed21DL outperformed MSA-based predictions. Combination with homology-based inference increased performance to F1 = 48 ± 3% (95% CI) and MCC = 0.46 ± 0.04 when merging all three ligand classes into one. All results were confirmed by three independent data sets. Focusing on very reliably predicted residues could complement experimental evidence: For the 25% most strongly predicted binding residues, at least 73% were correctly predicted even when ignoring the problem of missing experimental annotations. The new method bindEmbed21 is fast, simple, and broadly applicable-neither using structure nor MSAs. Thereby, it found binding residues in over 42% of all human proteins not otherwise implied in binding and predicted about 6% of all residues as binding to metal ions, nucleic acids, or small molecules., (© 2021. The Author(s).)
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- 2021
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34. Clustering FunFams using sequence embeddings improves EC purity.
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Littmann M, Bordin N, Heinzinger M, Schütze K, Dallago C, Orengo C, and Rost B
- Abstract
Motivation: Classifying proteins into functional families can improve our understanding of protein function and can allow transferring annotations within one family. For this, functional families need to be 'pure', i.e., contain only proteins with identical function. Functional Families (FunFams) cluster proteins within CATH superfamilies into such groups of proteins sharing function. 11% of all FunFams (22 830 of 203 639) contain EC annotations and of those, 7% (1526 of 22 830) have inconsistent functional annotations., Results: We propose an approach to further cluster FunFams into functionally more consistent sub-families by encoding their sequences through embeddings. These embeddings originate from language models transferring knowledge gained from predicting missing amino acids in a sequence (ProtBERT) and have been further optimized to distinguish between proteins belonging to the same or a different CATH superfamily (PB-Tucker). Using distances between embeddings and DBSCAN to cluster FunFams and identify outliers, doubled the number of pure clusters per FunFam compared to random clustering. Our approach was not limited to FunFams but also succeeded on families created using sequence similarity alone. Complementing EC annotations, we observed similar results for binding annotations. Thus, we expect an increased purity also for other aspects of function. Our results can help generating FunFams; the resulting clusters with improved functional consistency allow more reliable inference of annotations. We expect this approach to succeed equally for any other grouping of proteins by their phenotypes., Availability and Implementation: Code and embeddings are available via GitHub: https://github.com/Rostlab/FunFamsClustering., Supplementary Information: Supplementary data are available at Bioinformatics online., (© The Author(s) 2021. Published by Oxford University Press.)
- Published
- 2021
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35. PredictProtein - Predicting Protein Structure and Function for 29 Years.
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Bernhofer M, Dallago C, Karl T, Satagopam V, Heinzinger M, Littmann M, Olenyi T, Qiu J, Schütze K, Yachdav G, Ashkenazy H, Ben-Tal N, Bromberg Y, Goldberg T, Kajan L, O'Donoghue S, Sander C, Schafferhans A, Schlessinger A, Vriend G, Mirdita M, Gawron P, Gu W, Jarosz Y, Trefois C, Steinegger M, Schneider R, and Rost B
- Subjects
- Binding Sites, Coronavirus Nucleocapsid Proteins chemistry, DNA-Binding Proteins chemistry, Phosphoproteins chemistry, Protein Structure, Secondary, Proteins chemistry, Proteins physiology, RNA-Binding Proteins chemistry, Sequence Alignment, Sequence Analysis, Protein, Protein Conformation, Software
- Abstract
Since 1992 PredictProtein (https://predictprotein.org) is a one-stop online resource for protein sequence analysis with its main site hosted at the Luxembourg Centre for Systems Biomedicine (LCSB) and queried monthly by over 3,000 users in 2020. PredictProtein was the first Internet server for protein predictions. It pioneered combining evolutionary information and machine learning. Given a protein sequence as input, the server outputs multiple sequence alignments, predictions of protein structure in 1D and 2D (secondary structure, solvent accessibility, transmembrane segments, disordered regions, protein flexibility, and disulfide bridges) and predictions of protein function (functional effects of sequence variation or point mutations, Gene Ontology (GO) terms, subcellular localization, and protein-, RNA-, and DNA binding). PredictProtein's infrastructure has moved to the LCSB increasing throughput; the use of MMseqs2 sequence search reduced runtime five-fold (apparently without lowering performance of prediction methods); user interface elements improved usability, and new prediction methods were added. PredictProtein recently included predictions from deep learning embeddings (GO and secondary structure) and a method for the prediction of proteins and residues binding DNA, RNA, or other proteins. PredictProtein.org aspires to provide reliable predictions to computational and experimental biologists alike. All scripts and methods are freely available for offline execution in high-throughput settings., (© The Author(s) 2021. Published by Oxford University Press on behalf of Nucleic Acids Research.)
- Published
- 2021
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36. Author Correction: Incidence of notified Lyme borreliosis in Germany, 2013-2017.
- Author
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Enkelmann J, Böhmer M, Fingerle V, Siffczyk C, Werber D, Littmann M, Merbecks SS, Helmeke C, Schroeder S, Hell S, Schlotthauer U, Burckhardt F, Stark K, Schielke A, and Wilking H
- Published
- 2021
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37. Learned Embeddings from Deep Learning to Visualize and Predict Protein Sets.
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Dallago C, Schütze K, Heinzinger M, Olenyi T, Littmann M, Lu AX, Yang KK, Min S, Yoon S, Morton JT, and Rost B
- Subjects
- Machine Learning, Natural Language Processing, Proteins, Artificial Intelligence, Deep Learning
- Abstract
Models from machine learning (ML) or artificial intelligence (AI) increasingly assist in guiding experimental design and decision making in molecular biology and medicine. Recently, Language Models (LMs) have been adapted from Natural Language Processing (NLP) to encode the implicit language written in protein sequences. Protein LMs show enormous potential in generating descriptive representations (embeddings) for proteins from just their sequences, in a fraction of the time with respect to previous approaches, yet with comparable or improved predictive ability. Researchers have trained a variety of protein LMs that are likely to illuminate different angles of the protein language. By leveraging the bio_embeddings pipeline and modules, simple and reproducible workflows can be laid out to generate protein embeddings and rich visualizations. Embeddings can then be leveraged as input features through machine learning libraries to develop methods predicting particular aspects of protein function and structure. Beyond the workflows included here, embeddings have been leveraged as proxies to traditional homology-based inference and even to align similar protein sequences. A wealth of possibilities remain for researchers to harness through the tools provided in the following protocols. © 2021 The Authors. Current Protocols published by Wiley Periodicals LLC. The following protocols are included in this manuscript: Basic Protocol 1: Generic use of the bio_embeddings pipeline to plot protein sequences and annotations Basic Protocol 2: Generate embeddings from protein sequences using the bio_embeddings pipeline Basic Protocol 3: Overlay sequence annotations onto a protein space visualization Basic Protocol 4: Train a machine learning classifier on protein embeddings Alternate Protocol 1: Generate 3D instead of 2D visualizations Alternate Protocol 2: Visualize protein solubility instead of protein subcellular localization Support Protocol: Join embedding generation and sequence space visualization in a pipeline., (© 2021 The Authors. Current Protocols published by Wiley Periodicals LLC.)
- Published
- 2021
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38. Embeddings from deep learning transfer GO annotations beyond homology.
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Littmann M, Heinzinger M, Dallago C, Olenyi T, and Rost B
- Subjects
- Amino Acid Sequence, Amino Acids chemistry, Deep Learning, Gene Ontology, Humans, Machine Learning, Molecular Sequence Annotation methods, Proteins chemistry, Sequence Homology, Amino Acid, Software, Computational Biology methods, Sequence Analysis, Protein methods
- Abstract
Knowing protein function is crucial to advance molecular and medical biology, yet experimental function annotations through the Gene Ontology (GO) exist for fewer than 0.5% of all known proteins. Computational methods bridge this sequence-annotation gap typically through homology-based annotation transfer by identifying sequence-similar proteins with known function or through prediction methods using evolutionary information. Here, we propose predicting GO terms through annotation transfer based on proximity of proteins in the SeqVec embedding rather than in sequence space. These embeddings originate from deep learned language models (LMs) for protein sequences (SeqVec) transferring the knowledge gained from predicting the next amino acid in 33 million protein sequences. Replicating the conditions of CAFA3, our method reaches an F
max of 37 ± 2%, 50 ± 3%, and 57 ± 2% for BPO, MFO, and CCO, respectively. Numerically, this appears close to the top ten CAFA3 methods. When restricting the annotation transfer to proteins with < 20% pairwise sequence identity to the query, performance drops (Fmax BPO 33 ± 2%, MFO 43 ± 3%, CCO 53 ± 2%); this still outperforms naïve sequence-based transfer. Preliminary results from CAFA4 appear to confirm these findings. Overall, this new concept is likely to change the annotation of proteins, in particular for proteins from smaller families or proteins with intrinsically disordered regions.- Published
- 2021
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39. Correction to: Detailed prediction of protein sub-nuclear localization.
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Littmann M, Goldberg T, Seitz S, Bodén M, and Rost B
- Abstract
Following publication of the original article [1], the author reported that an incorrect figure has been published as Figure 2. The correct Figure 2 is shown below.
- Published
- 2019
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40. Extensively drug-resistant Klebsiella pneumoniae ST307 outbreak, north-eastern Germany, June to October 2019.
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Haller S, Kramer R, Becker K, Bohnert JA, Eckmanns T, Hans JB, Hecht J, Heidecke CD, Hübner NO, Kramer A, Klaper K, Littmann M, Marlinghaus L, Neumann B, Pfeifer Y, Pfennigwerth N, Rogge S, Schaufler K, Thürmer A, Werner G, and Gatermann S
- Subjects
- Anti-Bacterial Agents therapeutic use, Bacterial Proteins, Drug Resistance, Multiple, Bacterial genetics, Humans, Klebsiella Infections diagnosis, Klebsiella Infections drug therapy, Klebsiella pneumoniae drug effects, Klebsiella pneumoniae genetics, Microbial Sensitivity Tests, Sequence Analysis, Anti-Bacterial Agents pharmacology, Cross Infection epidemiology, Disease Outbreaks, Klebsiella Infections epidemiology, Klebsiella pneumoniae isolation & purification, beta-Lactamases
- Abstract
From June to October 2019, 17 patients (six infected, 11 colonised) with an extensively drug-resistant (XDR) Klebsiella pneumoniae strain were notified from four Western Pomerania medical facilities. The XDR K. pneumoniae produced carbapenemases NDM-1 and OXA-48, and was only susceptible to chloramphenicol, tigecycline and cefiderocol. Synergistic activity was observed for the combination of aztreonam plus ceftazidime-avibactam. Genomic analyses showed all isolates belonged to K. pneumoniae sequence type 307. Control measures and further investigations are ongoing.
- Published
- 2019
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- View/download PDF
41. FunFam protein families improve residue level molecular function prediction.
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Scheibenreif L, Littmann M, Orengo C, and Rost B
- Subjects
- Binding Sites, Databases, Protein, Protein Binding, Proteins classification, Proteins metabolism, Protein Domains, Proteins chemistry
- Abstract
Background: The CATH database provides a hierarchical classification of protein domain structures including a sub-classification of superfamilies into functional families (FunFams). We analyzed the similarity of binding site annotations in these FunFams and incorporated FunFams into the prediction of protein binding residues., Results: FunFam members agreed, on average, in 36.9 ± 0.6% of their binding residue annotations. This constituted a 6.7-fold increase over randomly grouped proteins and a 1.2-fold increase (1.1-fold on the same dataset) over proteins with the same enzymatic function (identical Enzyme Commission, EC, number). Mapping de novo binding residue prediction methods (BindPredict-CCS, BindPredict-CC) onto FunFam resulted in consensus predictions for those residues that were aligned and predicted alike (binding/non-binding) within a FunFam. This simple consensus increased the F1-score (for binding) 1.5-fold over the original prediction method. Variation of the threshold for how many proteins in the consensus prediction had to agree provided a convenient control of accuracy/precision and coverage/recall, e.g. reaching a precision as high as 60.8 ± 0.4% for a stringent threshold., Conclusions: The FunFams outperformed even the carefully curated EC numbers in terms of agreement of binding site residues. Additionally, we assume that our proof-of-principle through the prediction of protein binding residues will be relevant for many other solutions profiting from FunFams to infer functional information at the residue level.
- Published
- 2019
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- View/download PDF
42. Detailed prediction of protein sub-nuclear localization.
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Littmann M, Goldberg T, Seitz S, Bodén M, and Rost B
- Subjects
- Proteins chemistry, Proteins classification, Proteins physiology, Support Vector Machine, Cell Nucleus chemistry, Computational Biology methods, Nuclear Proteins chemistry, Nuclear Proteins classification, Nuclear Proteins physiology, Sequence Analysis, Protein methods
- Abstract
Background: Sub-nuclear structures or locations are associated with various nuclear processes. Proteins localized in these substructures are important to understand the interior nuclear mechanisms. Despite advances in high-throughput methods, experimental protein annotations remain limited. Predictions of cellular compartments have become very accurate, largely at the expense of leaving out substructures inside the nucleus making a fine-grained analysis impossible., Results: Here, we present a new method (LocNuclei) that predicts nuclear substructures from sequence alone. LocNuclei used a string-based Profile Kernel with Support Vector Machines (SVMs). It distinguishes sub-nuclear localization in 13 distinct substructures and distinguishes between nuclear proteins confined to the nucleus and those that are also native to other compartments (traveler proteins). High performance was achieved by implicitly leveraging a large biological knowledge-base in creating predictions by homology-based inference through BLAST. Using this approach, the performance reached AUC = 0.70-0.74 and Q13 = 59-65%. Travelling proteins (nucleus and other) were identified at Q2 = 70-74%. A Gene Ontology (GO) analysis of the enrichment of biological processes revealed that the predicted sub-nuclear compartments matched the expected functionality. Analysis of protein-protein interactions (PPI) show that formation of compartments and functionality of proteins in these compartments highly rely on interactions between proteins. This suggested that the LocNuclei predictions carry important information about function. The source code and data sets are available through GitHub: https://github.com/Rostlab/LocNuclei ., Conclusions: LocNuclei predicts subnuclear compartments and traveler proteins accurately. These predictions carry important information about functionality and PPIs.
- Published
- 2019
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43. Post-exposure prophylaxis for measles with immunoglobulins revised recommendations of the standing committee on vaccination in Germany.
- Author
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Matysiak-Klose D, Santibanez S, Schwerdtfeger C, Koch J, von Bernuth H, Hengel H, Littmann M, Terhardt M, Wicker S, Mankertz A, and Heininger U
- Subjects
- Advisory Committees, Antibodies, Viral administration & dosage, Disease Management, Germany, Humans, Measles prevention & control, Mumps prevention & control, Risk Factors, Rubella prevention & control, Vaccination, Antibodies, Viral therapeutic use, Immunization, Passive, Post-Exposure Prophylaxis methods, Practice Guidelines as Topic
- Abstract
Passive immunisation with immunoglobulins as post-exposure prophylaxis after contact with measles is recommended by the German Standing Committee on Vaccination (STIKO) particularly for unprotected individuals at high risk of complications for whom active immunization is contraindicated, such as infants <6 months of age, immunocompromised patients and pregnant women. The efficacy of passive immunisation in preventing measles depends on how soon after exposure it is administered, the concentration of measles antibodies in the immunoglobulin products and dosage. Since the global introduction of standard active immunisation against measles and the concomitant reduction in virus circulation, the levels of measles virus (MV)-specific IgG antibodies in the population have dropped. Thus, the concentration of MV-specific antibodies in immunoglobulin products derived from human plasma donors has declined as the proportion of vaccinated donors has increased. The MV-neutralizing capacity of immunoglobulin products is not routinely tested in Germany. No official data exist on the concentrations of MV-specific IgG antibodies in individual batches of immunoglobulins available in Germany and the required minimum level for MV-specific IgG is not stipulated. The STIKO re-evaluated available data and measurements of MV-neutralizing capacities of available immunoglobulin (IgG) products in Germany at the National Reference Centre Measles, Mumps, Rubella at the Robert Koch Institute. Based on the findings, STIKO modified its previous recommendations on the post-exposure use of immunoglobulins (2001), especially with respect to risk groups, application and dosage. STIKO now recommends a single intravenous administration of immunoglobulins (400 mg/kg body weight) as soon as possible, preferably within six days, after exposure to measles, specifically for infants aged <6 months, susceptible pregnant women and immunocompromised patients., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
44. Incidence of notified Lyme borreliosis in Germany, 2013-2017.
- Author
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Enkelmann J, Böhmer M, Fingerle V, Siffczyk C, Werber D, Littmann M, Merbecks SS, Helmeke C, Schroeder S, Hell S, Schlotthauer U, Burckhardt F, Stark K, Schielke A, and Wilking H
- Subjects
- Adolescent, Adult, Age Factors, Aged, Aged, 80 and over, Borrelia burgdorferi isolation & purification, Child, Child, Preschool, Female, Germany epidemiology, Humans, Incidence, Infant, Lyme Disease diagnosis, Male, Middle Aged, Public Health, Seasons, Sex Factors, Young Adult, Lyme Disease epidemiology
- Abstract
Lyme borreliosis (LB) is the most commonly reported tick-borne disease in Germany. In 9/16 states, notification of erythema migrans (EM), acute neuroborreliosis (NB) and Lyme arthritis (LA) is mandatory. We describe incidence measures, time trends, geographical distribution and frequencies of manifestations to better understand LB epidemiology and target prevention measures. We used cases notified in the 9 states and confirmed by local health offices, 2013-2017, to calculate incidences by time, place and person. Altogether, we observed 56,446 cases. Disease onset peaked yearly in July. Incidence ranged from 26/100,000 (2015) to 41/100,000 (2013) with mean annual incidences 2013-2017 on district level between 0.5/100,000 and 138/100,000. Median age was 54 years with peaks in boys (5-9 years, mean incidence 36/100,000) and women (50-69 years, mean incidence 57/100,000). 95% experienced EM only, 2.7% NB and 2.1% LA. 54% were female, but more men had NB (56%) and LA (53%, p < 0.001). Hospitalisation was recorded for 10% of LA and 71% of NB cases. LB remains an important public health concern in Germany with marked regional variation. To facilitate early diagnosis and treatment, health authorities should raise awareness among physicians and promote prevention strategies among the general population: tick-bite-protection, prompt tick removal and medical consultation.
- Published
- 2018
- Full Text
- View/download PDF
45. Long-lasting cough in an adult German population: incidence, symptoms, and related pathogens.
- Author
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Weinberger R, Riffelmann M, Kennerknecht N, Hülße C, Littmann M, O'Brien J, von Kries R, and von König CHW
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Antibodies, Bacterial blood, Antibodies, Viral blood, Bacteria immunology, Bacteria isolation & purification, Bacterial Infections epidemiology, Bacterial Infections microbiology, Chronic Disease, Cohort Studies, Female, Germany epidemiology, Humans, Incidence, Kaplan-Meier Estimate, Male, Middle Aged, Nasopharynx microbiology, Smoking epidemiology, Virus Diseases epidemiology, Virus Diseases virology, Viruses immunology, Viruses isolation & purification, Young Adult, Cough epidemiology, Cough microbiology, Cough virology
- Abstract
Studies of the incidence of pertussis in adults have shown that it accounts for only 5-15% cases of prolonged coughing. We assessed the burden of suffering related to prolonged coughing and tried to identify further causative agents. Based on a sentinel study with 35 general practitioners in two German cities (Krefeld, Rostock), with 3,946 patients fulfilling the inclusion criteria, we estimated the incidence of prolonged coughing in adults. In 975 of these outpatients, PCR and/or serology for adenovirus, Bordetella pertussis and B. parapertussis, human metapneumovirus, influenza virus A and rhinovirus, parainfluenza virus, Mycoplasma pneumonia, and respiratory syncytial virus (RSV) were performed. Treatment data were extracted for a subgroup of 138 patients. Descriptive statistics, including Kaplan-Maier curves were generated. Yearly incidence ranged between 1.4 and 2.1% per population in the two cities. Adult patients sought medical attention only after a median of 3 weeks of coughing. Irrespective of smoking and unrelated to the identified pathogens, the median duration of coughing was 6 weeks, with an interquartile range of 4-11 weeks. In 48.3% of patients, possible pathogens were identified, among which adenovirus (15.1%), RSV (7.5%), B. pertussis (5.6%), and influenza viruses (4.0%) were most often found. Symptoms were not indicative of a specific agent and a total of 64% of patients received antibiotics. Prolonged adult coughing requiring medical attention prompts substantial healthcare use. Apart from B. pertussis, a broad range of pathogens was associated with the symptoms. However, patients sought medical attention too late to guide efficacious therapeutic interventions using the diagnostic tests.
- Published
- 2018
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46. Crowdsourcing, the great meteor storm of 1833, and the founding of meteor science.
- Author
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Littmann M and Suomela T
- Subjects
- Astronomy history, Correspondence as Topic history, History, 19th Century, Humans, Newspapers as Topic history, United States, Crowdsourcing history, Meteoroids
- Abstract
Yale science professor Denison Olmsted used crowdsourcing to gather observations from across the United States of the unexpected deluge of meteors on 13 November 1833--more than 72,000/h. He used these observations (and newspaper accounts and correspondence from scientists) to make a commendably accurate interpretation of the meteor storm, overturning 2100 years of erroneous teachings about shooting stars and establishing meteor science as a new branch of astronomy. Olmsted's success was substantially based on his use of newspapers and their practice of news pooling to solicit observations from throughout the country by lay and expert observers professionally unaffiliated with Yale College and him. In today's parlance, Olmsted was a remarkably successful early practitioner of scientific crowdsourcing, also known as citizen science. He may have been the first to use mass media for crowdsourcing in science. He pioneered many of the citizen-science crowdsourcing practices that are still in use today: an open call for citizen participation, a clearly defined task, a large geographical distribution for gathering data and a rapid response to opportunistic events. Olmsted's achievement is not just that he used crowdsourcing in 1833 but that crowdsourcing helped him to advance science significantly., (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Published
- 2014
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47. Tick-borne encephalitis virus habitats in North East Germany: reemergence of TBEV in ticks after 15 years of inactivity.
- Author
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Frimmel S, Krienke A, Riebold D, Loebermann M, Littmann M, Fiedler K, Klaus C, Süss J, and Reisinger EC
- Subjects
- Animals, Geography, Germany, Humans, Mice, Phylogeny, Time Factors, Ecosystem, Encephalitis Viruses, Tick-Borne physiology, Ixodidae virology
- Abstract
The incidence of tick-borne encephalitis has risen in Europe since 1990 and the tick-borne encephalitis virus (TBEV) has been documented to be spreading into regions where it was not previously endemic. In Mecklenburg-West Pomerania, a federal state in Northern Germany, TBEV was not detectable in over 16,000 collected ticks between 1992 and 2004. Until 2004, the last human case of TBE in the region was reported in 1985. Following the occurrence of three autochthonous human cases of TBE after 2004, however, we collected ticks from the areas in which the infections were contracted. To increase the chance of detecting TBEV-RNA, some of the ticks were fed on mice. Using nested RT-PCR, we were able to confirm the presence of TBEV in ticks for the first time after 15 years. A phylogenetic analysis revealed a close relationship between the sequences we obtained and a TBEV sequence from Mecklenburg-East Pomerania published in 1992 and pointed to the reemergence of a natural focus of TBEV after years of low activity. Our results imply that natural foci of TBEV may either persist at low levels of activity for years or reemerge through the agency of migrating birds.
- Published
- 2014
- Full Text
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48. Rotavirus vaccine effectiveness and case-control study on risk factors for breakthrough infections in Germany, 2010-2011.
- Author
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Adlhoch C, Hoehne M, Littmann M, Marques AM, Lerche A, Dehnert M, Eckmanns T, Wichmann O, and Koch J
- Subjects
- Breast Feeding, Case-Control Studies, Child, Preschool, Feces virology, Female, Genotype, Germany epidemiology, Humans, Infant, Male, Mass Vaccination statistics & numerical data, Regression Analysis, Risk Factors, Rotavirus genetics, Rotavirus isolation & purification, Rotavirus Infections epidemiology, Rotavirus Infections prevention & control, Rotavirus Vaccines administration & dosage
- Abstract
Background: In the German federal state Mecklenburg-Western Pomerania, routine rotavirus (RV) vaccination in infants has been recommended since 2009. The effectiveness of RV vaccination was investigated after an unexpectedly high number of RV infections in fully vaccinated children occurred., Methods: Intensified RV surveillance was performed in Mecklenburg-Western Pomerania between 2010 and 2011. The screening method was applied to assess vaccine effectiveness (VE) in children up to 24 months after vaccination. To identify risk factors for breakthrough infections, a case-control study and genotyping were conducted in vaccinated and unvaccinated RV-infected children., Results: VE for the prevention of RV infection requiring medical attention or hospitalization was 68% (95% confidence interval [CI]: 61-71) and 80% (95% CI: 77-83), respectively. VE for preventing hospitalization but not medical attention remained stable over 2 years. Vaccinated were less often hospitalized (23%) than unvaccinated RV-infected children (61%; P < 0.001). Breastfeeding (odds ratio, 3.99; 95% CI: 1.92-8.27) and attending daycare (odds ratio, 3.42; 95% CI: 1.64-7.12) were independently associated with breakthrough infections. Genotype G1P[8] was detected more frequently in RotaTeq-vaccinated (44% versus 11%; P < 0.03) and G2P[4] in Rotarix-vaccinated children (42% versus 6%; P < 0.02)., Conclusions: RV vaccination protects young children effectively from RV disease and can reduce disease severity. Breastfeeding might impair VE, but further research is needed to identify the critical time window for this interference and to develop appropriate recommendations.
- Published
- 2013
- Full Text
- View/download PDF
49. Effectiveness of the AS03-adjuvanted vaccine against pandemic influenza virus A/(H1N1) 2009--a comparison of two methods; Germany, 2009/10.
- Author
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Uphoff H, An der Heiden M, Schweiger B, Campe H, Beier D, Helmeke C, Littmann M, Haas W, Buda S, Faensen D, Feig M, Altmann D, Wichmann O, Eckmanns T, and Buchholz U
- Subjects
- Adolescent, Adult, Age Distribution, Aged, Aged, 80 and over, Case-Control Studies, Child, Child, Preschool, Female, Germany epidemiology, Humans, Infant, Infant, Newborn, Influenza Vaccines immunology, Influenza, Human epidemiology, Influenza, Human virology, Logistic Models, Male, Middle Aged, Multivariate Analysis, Treatment Outcome, Vaccination, Young Adult, Adjuvants, Immunologic therapeutic use, Influenza A Virus, H1N1 Subtype immunology, Influenza Vaccines therapeutic use, Influenza, Human drug therapy, Influenza, Human immunology, Pandemics prevention & control
- Abstract
During the autumn wave of the pandemic influenza virus A/(H1N1) 2009 (pIV) the German population was offered an AS03-adjuvanted vaccine. The authors compared results of two methods calculating the effectiveness of the vaccine (VE). The test-negative case-control method used data from virologic surveillance including influenza-positive and negative patients. An innovative case-series methodology explored data from all nationally reported laboratory-confirmed influenza cases. The proportion of reported cases occurring in vaccinees during an assumed unprotected phase after vaccination was compared with that occurring in vaccinees during their assumed protected phase. The test-negative case-control method included 1,749 pIV cases and 2,087 influenza test-negative individuals of whom 6 (0.3%) and 36 (1.7%), respectively, were vaccinated. The case series method included data from 73,280 cases. VE in the two methods was 79% (95% confidence interval (CI) = 35-93%; P = 0.007) and 87% (95% CI = 78-92%; P<0.001) for individuals less than 14 years of age and 70% (95% CI = -45%-94%, P = 0.13) and 74% (95% CI = 64-82%; P<0.001) for individuals above the age of 14. Both methods yielded similar VE in both age groups; and VE for the younger age group seemed to be higher.
- Published
- 2011
- Full Text
- View/download PDF
50. Human cowpox virus infection acquired from a circus elephant in Germany.
- Author
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Hemmer CJ, Littmann M, Löbermann M, Meyer H, Petschaelis A, and Reisinger EC
- Subjects
- Animal Husbandry, Animals, Cowpox diagnosis, Cowpox virus genetics, Cowpox virus isolation & purification, DNA, Viral genetics, DNA, Viral isolation & purification, Female, Humans, Male, Occupational Diseases diagnosis, Young Adult, Zoonoses transmission, Zoonoses virology, Cowpox transmission, Cowpox veterinary, Elephants virology
- Abstract
A 40-year-old Asian circus elephant developed mouth and trunk ulcers. Three weeks later, her 19-year-old animal warden noticed a vesicle on his forearm, evolving into a scab. Identical cowpox strains were isolated from lesions of the elephant and the warden. Cowpox virus could no longer be isolated after the scab disappeared, but PCR still revealed orthopox DNA. Healing was complete seven weeks later, leaving a 1 cm scar., (Copyright © 2010 International Society for Infectious Diseases. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
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