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50 results on '"Esteban, Genoveva F."'

4. Symbiosis

Author

Esteban, Genoveva F., Fenchel, Tom M., Esteban, Genoveva F., and Fenchel, Tom M.

Published
2020
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8. Feeding

Author

Esteban, Genoveva F., Fenchel, Tom M., Esteban, Genoveva F., and Fenchel, Tom M.

Published
2020
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10. Bioenergetics

Author

Esteban, Genoveva F., Fenchel, Tom M., Esteban, Genoveva F., and Fenchel, Tom M.

Published
2020
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20. Contributors to Volume IV

Author

Abebe, Eyualem, primary, Anokhin, Boris, additional, Araujo, Rafael, additional, Bain, Bonnie A., additional, Balsamo, Maria, additional, Bartsch, Ilse, additional, Bekker, Eugeniya I., additional, Bielecki, Aleksander, additional, Brandis, Dirk, additional, Daneliya, Mikhail E., additional, Decraemer, Wilfrida, additional, DeWalt, R. Edward, additional, d’Hondt, Jean-Loup, additional, Eisendle-Flöckner, Ursula, additional, Esteban, Genoveva F., additional, Gelder, Stuart R., additional, Gil, João, additional, Glagolev, Sergei M., additional, Glasby, Christopher J., additional, Govedich, Fredric R., additional, Grilli, Paolo, additional, Guidetti, Roberto, additional, Hansknecht, Tom, additional, Horne, David J., additional, Jankowski, Thomas, additional, Klaus, Sebastian, additional, Korovchinsky, Nikolai M., additional, Kotov, Alexey A., additional, Lee, Dong Ju, additional, Lee, Wonchoel, additional, Lewis, Julian J., additional, Lovell, Lawrence L., additional, Manconi, Renata, additional, Martens, Koen, additional, Martin, Daniel, additional, Martin, Patrick, additional, Meisch, Claude, additional, Morino, Hiroshi, additional, Moser, William E., additional, Nakano, Takafumi, additional, Naruse, Tohru, additional, Nelson, Diane R., additional, Ng, Ngan Kee, additional, Noreña, Carolina, additional, Pati, Sameer Kumar, additional, Petryashov, Victor V., additional, Porfiriev, Andrey, additional, Pronzato, Roberto, additional, Rebecchi, Lorena, additional, Resh, Vincent H., additional, Rogers, D. Christopher, additional, Sarma, S.S.S., additional, Schmidt-Rhaesa, Andreas, additional, Segers, Hendrik, additional, Sinev, Artem Y., additional, Sket, Boris, additional, Smirnov, Nikolai N., additional, Snell, T.W., additional, Strand, Malin, additional, Sundberg, Per, additional, Takhteev, Vadim, additional, Thorp, James H., additional, Timm, Tarmo, additional, Timoshkin, Oleg, additional, Utevsky, Serge, additional, Väinölä, Risto, additional, Van Syoc, Robert J., additional, Vinarski, Maxim V., additional, Wallace, Robert L., additional, Walsh, E.J., additional, Warren, Alan, additional, Watling, Les, additional, Wood, Timothy S., additional, and Yeo, Darren C.J., additional

Published
2019
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27. Contributors to Volume II

Author

Álvarez, Fernando, primary, Bain, Bonnie A., additional, Bartsch, llse, additional, Behan-Pelletier, Valerie, additional, Bolek, Matthew G., additional, Brinkhurst, Ralph O., additional, Brusa, Francisco, additional, Campbell, Richard D., additional, Cho, Joo-lae, additional, Cook, David R., additional, Cummings, Kevin S., additional, Damborenea, Cristina, additional, Edward DeWalt, R., additional, Esteban, Genoveva F., additional, Fetzner, James W., additional, Finlay, Bland J., additional, Gelder, Stuart R., additional, Govedich, Fredric R., additional, Graf, Daniel L., additional, Guidetti, Roberto, additional, Hanelt, Ben, additional, Hann, Brenda J., additional, Hansknecht, Tom, additional, Horne, David J., additional, Lewis, Julian J., additional, Lovell, Lawrence L., additional, Kånneby, Tobias, additional, Manconi, Renata, additional, Moser, William E., additional, Nelson, Diane R., additional, Noreña, Carolina, additional, Norton, Roy A., additional, Oceguera-Figueroa, Alejandro, additional, Phillips, Anna J., additional, Poinar, George O., additional, Price, Wayne, additional, Pronzato, Roberto, additional, Rebecchi, Lorena, additional, Reid, Janet W., additional, Resh, Vincent H., additional, Richardson, Dennis J., additional, Rogers, D. Christopher, additional, Sarma, S.S.S., additional, Schmidt-Rhaesa, Andreas, additional, Segers, Hendrik, additional, Smith, Alison J., additional, Smith, Ian M., additional, Snell, T.W., additional, Strand, Malin, additional, Sundberg, Per, additional, Taylor, Christopher A., additional, Thoma, Roger F., additional, Thorp, James H., additional, Van Syoc, Robert J., additional, Cristina de Villalobos, L., additional, Wallace, Robert L., additional, Walsh, Elizabeth J., additional, Warren, Alan, additional, Wood, Timothy S., additional, and Zanca, Fernanda, additional

Published
2016
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28. Protozoa

Author

Warren, Alan, primary, Esteban, Genoveva F., additional, and Finlay, Bland J., additional

Published
2016
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31. Convergent Evolution of Hydrogenosomes from Mitochondria by Gene Transfer and Loss

Author

Lewis, William H, Lind, Anders E., Sendra, Kacper M., Onsbring Gustafson, Henning, Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs J. G., Embley, T. Martin, Lewis, William H, Lind, Anders E., Sendra, Kacper M., Onsbring Gustafson, Henning, Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs J. G., and Embley, T. Martin

Abstract

Hydrogenosomes are H-2-producing mitochondrial homologs found in some anaerobic microbial eukaryotes that provide a rare intracellular niche for H-2-utilizing endosymbiotic archaea. Among ciliates, anaerobic and aerobic lineages are interspersed, demonstrating that the switch to an anaerobic lifestyle with hydrogenosomes has occurred repeatedly and independently. To investigate the molecular details of this transition, we generated genomic and transcriptomic data sets from anaerobic ciliates representing three distinct lineages. Our data demonstrate that hydrogenosomes have evolved from ancestral mitochondria in each case and reveal different degrees of independent mitochondrial genome and proteome reductive evolution, including the first example of complete mitochondrial genome loss in ciliates. Intriguingly, the FeFe-hydrogenase used for generating H-2 has a unique domain structure among eukaryotes and appears to have been present, potentially through a single lateral gene transfer from an unknown donor, in the common aerobic ancestor of all three lineages. The early acquisition and retention of FeFe-hydrogenase helps to explain the facility whereby mitochondrial function can be so radically modified within this diverse and ecologically important group of microbial eukaryotes.

Published
2020
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32. Convergent Evolution of Hydrogenosomes from Mitochondria by Gene Transfer and Loss

Author

Lewis, William H., Lind, Anders E., Sendra, Kacper M., Onsbring, Henning, Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs J.G., Embley, T.M., Lewis, William H., Lind, Anders E., Sendra, Kacper M., Onsbring, Henning, Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs J.G., and Embley, T.M.

Abstract

Hydrogenosomes are H2-producing mitochondrial homologs found in some anaerobic microbial eukaryotes that provide a rare intracellular niche for H2-utilizing endosymbiotic archaea. Among ciliates, anaerobic and aerobic lineages are interspersed, demonstrating that the switch to an anaerobic lifestyle with hydrogenosomes has occurred repeatedly and independently. To investigate the molecular details of this transition, we generated genomic and transcriptomic data sets from anaerobic ciliates representing three distinct lineages. Our data demonstrate that hydrogenosomes have evolved from ancestral mitochondria in each case and reveal different degrees of independent mitochondrial genome and proteome reductive evolution, including the first example of complete mitochondrial genome loss in ciliates. Intriguingly, the FeFe-hydrogenase used for generating H2 has a unique domain structure among eukaryotes and appears to have been present, potentially through a single lateral gene transfer from an unknown donor, in the common aerobic ancestor of all three lineages. The early acquisition and retention of FeFe-hydrogenase helps to explain the facility whereby mitochondrial function can be so radically modified within this diverse and ecologically important group of microbial eukaryotes.

Published
2020

33. Protistological science dissemination

Author

Buonanno, Federico, primary, Dolan, John R., additional, Esteban, Genoveva F., additional, Hines, Hunter N., additional, Kamra, Komal, additional, Kosakyan, Anush, additional, Miceli, Cristina, additional, Samaritani, Emanuela, additional, Vannini, Claudia, additional, and Warren, Alan, additional

Published
2020
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37. Cosmopolitan Metapopulations?

Author

Fenchel, Tom, Finlay, Bland J., Esteban, Genoveva F., Fenchel, Tom, Finlay, Bland J., and Esteban, Genoveva F.

Published
2019

38. Ciliophora sp. Raw sequence reads

Author

Lewis, William, Lind, Anders E., Sendra, Kacper M., Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs, Embley, T.M., Lewis, William, Lind, Anders E., Sendra, Kacper M., Williams, Tom A., Esteban, Genoveva F., Hirt, Robert P., Ettema, Thijs, and Embley, T.M.

Abstract

Investigating the repeated convergent evolution of ciliate hydrogenosomes from three distinct lineages, using a combined genomic and transcriptomic datasets

Published
2019

42. Molecular Investigation of the Ciliate Spirostomum semivirescens, with First Transcriptome and New Geographical Records

Author

Hines, Hunter N., Onsbring Gustafson, Henning, Ettema, Thijs J. G., Esteban, Genoveva F., Hines, Hunter N., Onsbring Gustafson, Henning, Ettema, Thijs J. G., and Esteban, Genoveva F.

Abstract

The ciliate Spirostomum semivirescens is a large freshwater protist densely packed with endosymbiotic algae and capable of building a protective coating from surrounding particles. The species has been rarely recorded and it lacks any molecular investigations. We obtained such data from S. semivirescens isolated in the UK and Sweden. Using single-cell RNA sequencing of isolates from both countries, the transcriptome of S. semivirescens was generated. A phylogenetic analysis identified S. semivirescens as a close relative to S. minus. Additionally, rRNA sequence analysis of the green algal endosymbiont revealed that it is closely related to Chlorella vulgaris. Along with the molecular species identification, an analysis of the ciliates' stop codons was carried out, which revealed a relationship where TGA stop codon frequency decreased with increasing gene expression levels. The observed codon bias suggests that S. semivirescens could be in an early stage of reassigning the TGA stop codon. Analysis of the transcriptome indicates that S. semivirescens potentially uses rhodoquinol-dependent fumarate reduction to respire in the oxygen-depleted habitats where it lives. The data also shows that despite large geographical distances (over 1,600 km) between the sampling sites investigated, a morphologically-identical species can share an exact molecular signature, suggesting that some ciliate species, even those over 1 mm in size, could have a global biogeographical distribution., Hunter N. Hines and Henning Onsbring contributed equally to this work.

Published
2018
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48. Effects of Copper and the Insecticide Cypermethrin on a Soil Ciliate (Protozoa: Ciliophora) Community.

Author

Luu, Hai T.T., Esteban, Genoveva F., Butt, Andrew A., and Green, Iain D.

Subjects
CYPERMETHRIN, INSECTICIDES, NUMBERS of species, CILIATA, MENTAL healing
Abstract

• Total ciliate abundance was increased by Cu and cypermethrin treatment. • Sensitive species were lost from the community at high Cu and cypermethrin levels. • Tolerant species seemed to increase in abundance in the absence of sensitive species. • The ciliate community structure was altered at high Cu and cypermethrin levels. Ciliated protozoa play important ecological roles in soils, yet few studies have investigated the effect of soil pollution on them. We determined the effect of copper (Cu) and cypermethrin on a soil ciliate community under microcosm conditions. Soils were treated with Cu or cypermethrin and the abundance and species richness of ciliates determined 15 days later. Cu treatment increased soil ciliates abundance at the highest concentration (960 mg kg−1), as did cypermethrin at a treatment of 160 mg kg−1. No negative effect on ciliate abundance was found for either substance due to increased numbers of tolerant species, particularly Homalogastra setosa and Chilodonella uncinata in the case of Cu and Colpoda stenii and Colpoda inflata for cypermethrin treatments. However, several species were absent at high treatment levels. Notably, Halteria grandinella was not found in Cu treatments above 240 mg kg−1, whilst Oxytricha setigera was not found in cypermethrin treatments above 160 mg kg−1. For Homalogastra setosa , there was an initial positive response to cypermethrin, but abundance then decreased at a treatment of 320 mg kg−1, and treatment at 640 mg kg−1 eradicated the species from the microcosms. Accordingly, both substances affected the structure of the soil ciliate community at high concentrations. [ABSTRACT FROM AUTHOR]

Published
2022
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50. Convergent Evolution of Hydrogenosomes from Mitochondria by Gene Transfer and Loss.

Author

Lewis WH, Lind AE, Sendra KM, Onsbring H, Williams TA, Esteban GF, Hirt RP, Ettema TJG, and Embley TM

Subjects
Aerobiosis, Anaerobiosis, Ciliophora physiology, Evolution, Molecular, Gene Transfer, Horizontal, Genome, Mitochondrial, Hydrogen metabolism, Phylogeny, Sequence Analysis, RNA, Ciliophora classification, Gene Expression Profiling methods, Mitochondria genetics, Sequence Analysis, DNA methods
Abstract

Hydrogenosomes are H2-producing mitochondrial homologs found in some anaerobic microbial eukaryotes that provide a rare intracellular niche for H2-utilizing endosymbiotic archaea. Among ciliates, anaerobic and aerobic lineages are interspersed, demonstrating that the switch to an anaerobic lifestyle with hydrogenosomes has occurred repeatedly and independently. To investigate the molecular details of this transition, we generated genomic and transcriptomic data sets from anaerobic ciliates representing three distinct lineages. Our data demonstrate that hydrogenosomes have evolved from ancestral mitochondria in each case and reveal different degrees of independent mitochondrial genome and proteome reductive evolution, including the first example of complete mitochondrial genome loss in ciliates. Intriguingly, the FeFe-hydrogenase used for generating H2 has a unique domain structure among eukaryotes and appears to have been present, potentially through a single lateral gene transfer from an unknown donor, in the common aerobic ancestor of all three lineages. The early acquisition and retention of FeFe-hydrogenase helps to explain the facility whereby mitochondrial function can be so radically modified within this diverse and ecologically important group of microbial eukaryotes., (© The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.)

Published
2020
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