Academic literature on the topic 'Choanoflagellatea'

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Journal articles on the topic "Choanoflagellatea"

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Ginés-Rivas, Juan J., and Martin Carr. "Slowly evolving proteins support the monophyly of Craspedida (Choanoflagellatea) and a marine origin of choanoflagellates." Protist 176 (March 2025): 126085. https://doi.org/10.1016/j.protis.2025.126085.

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Gogoleva, Natalia E., Marina A. Nasyrova, Alexander S. Balkin, et al. "Flourishing in Darkness: Protist Communities of Water Sites in Shulgan-Tash Cave (Southern Urals, Russia)." Diversity 16, no. 9 (2024): 526. http://dx.doi.org/10.3390/d16090526.

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Karst caves, formed by the erosion of soluble carbonate rocks, provide unique ecosystems characterized by stable temperatures and high humidity. These conditions support diverse microbial communities, including wall microbial fouling, aquatic biofilms, and planktonic communities. This study discloses the taxonomic diversity of protists in aquatic biotopes of Shulgan-Tash Cave, a culturally significant site and popular tourist destination, by 18S rRNA gene metabarcoding. Our findings reveal the rich protist communities in the cave’s aquatic biotopes, with the highest diversity observed in Blue
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NITSCHE, FRANK, MARTIN CARR, HARTMUT ARNDT, and BARRY S. C. LEADBEATER. "Higher Level Taxonomy and Molecular Phylogenetics of the Choanoflagellatea." Journal of Eukaryotic Microbiology 58, no. 5 (2011): 452–62. http://dx.doi.org/10.1111/j.1550-7408.2011.00572.x.

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Booth, David S., Heather Szmidt-Middleton, and Nicole King. "Transfection of choanoflagellates illuminates their cell biology and the ancestry of animal septins." Molecular Biology of the Cell 29, no. 25 (2018): 3026–38. http://dx.doi.org/10.1091/mbc.e18-08-0514.

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As the closest living relatives of animals, choanoflagellates offer unique insights into animal origins and core mechanisms underlying animal cell biology. However, unlike traditional model organisms, such as yeast, flies, and worms, choanoflagellates have been refractory to DNA delivery methods for expressing foreign genes. Here we report a robust method for expressing transgenes in the choanoflagellate Salpingoeca rosetta, overcoming barriers that have previously hampered DNA delivery and expression. To demonstrate how this method accelerates the study of S. rosetta cell biology, we engineer
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Wofford, Haley A., Josh Myers-Dean, Brandon A. Vogel, et al. "Domain Analysis and Motif Matcher (DAMM): A Program to Predict Selectivity Determinants in Monosiga brevicollis PDZ Domains Using Human PDZ Data." Molecules 26, no. 19 (2021): 6034. http://dx.doi.org/10.3390/molecules26196034.

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Choanoflagellates are single-celled eukaryotes with complex signaling pathways. They are considered the closest non-metazoan ancestors to mammals and other metazoans and form multicellular-like states called rosettes. The choanoflagellate Monosiga brevicollis contains over 150 PDZ domains, an important peptide-binding domain in all three domains of life (Archaea, Bacteria, and Eukarya). Therefore, an understanding of PDZ domain signaling pathways in choanoflagellates may provide insight into the origins of multicellularity. PDZ domains recognize the C-terminus of target proteins and regulate s
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Leadbeater, Barry S. C., QiBin Yu, Joyce Kent, and Dov J. Stekel. "Three-dimensional images of choanoflagellate loricae." Proceedings of the Royal Society B: Biological Sciences 276, no. 1654 (2008): 3–11. http://dx.doi.org/10.1098/rspb.2008.0844.

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Choanoflagellates are unicellular filter-feeding protozoa distributed universally in aquatic habitats. Cells are ovoid in shape with a single anterior flagellum encircled by a funnel-shaped collar of microvilli. Movement of the flagellum creates water currents from which food particles are entrapped on the outer surface of the collar and ingested by pseudopodia. One group of marine choanoflagellates has evolved an elaborate basket-like exoskeleton, the lorica, comprising two layers of siliceous costae made up of costal strips. A computer graphic model has been developed for generating three-di
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Needham, David M., Camille Poirier, Charles Bachy, et al. "The microbiome of a bacterivorous marine choanoflagellate contains a resource-demanding obligate bacterial associate." Nature Microbiology 7, no. 9 (2022): 1466–79. http://dx.doi.org/10.1038/s41564-022-01174-0.

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AbstractMicrobial predators such as choanoflagellates are key players in ocean food webs. Choanoflagellates, which are the closest unicellular relatives of animals, consume bacteria and also exhibit marked biological transitions triggered by bacterial compounds, yet their native microbiomes remain uncharacterized. Here we report the discovery of a ubiquitous, uncultured bacterial lineage we name Candidatus Comchoanobacterales ord. nov., related to the human pathogen Coxiella and physically associated with the uncultured marine choanoflagellate Bicosta minor. We analyse complete ‘Comchoano’ gen
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Sørensen, Siv, Seyed Saeed Asadzadeh, and Jens Honoré Walther. "Hydrodynamics of Prey Capture and Transportation in Choanoflagellates." Fluids 6, no. 3 (2021): 94. http://dx.doi.org/10.3390/fluids6030094.

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Choanoflagellates are unicellular microscopic organisms that are believed to be the closest living relatives of animals. They prey on bacteria through the act of the continuous beating of their flagellum, which generates a current through a crown-like filter. Subsequently, the filter retains bacterial particles from the suspension. The mechanism by which the prey is retained and transported along the filter remains unknown. We report here on the hydrodynamic effects on the transportability of bacterial prey of finite size using computational fluid dynamics. Here, the loricate choanoflagellate
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Woznica, Arielle, Alexandra M. Cantley, Christine Beemelmanns, Elizaveta Freinkman, Jon Clardy, and Nicole King. "Bacterial lipids activate, synergize, and inhibit a developmental switch in choanoflagellates." Proceedings of the National Academy of Sciences 113, no. 28 (2016): 7894–99. http://dx.doi.org/10.1073/pnas.1605015113.

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In choanoflagellates, the closest living relatives of animals, multicellular rosette development is regulated by environmental bacteria. The simplicity of this evolutionarily relevant interaction provides an opportunity to identify the molecules and regulatory logic underpinning bacterial regulation of development. We find that the rosette-inducing bacterium Algoriphagus machipongonensis produces three structurally divergent classes of bioactive lipids that, together, activate, enhance, and inhibit rosette development in the choanoflagellate Salpingoeca rosetta. One class of molecules, the lys
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Larson, Ben T., Teresa Ruiz-Herrero, Stacey Lee, Sanjay Kumar, L. Mahadevan, and Nicole King. "Biophysical principles of choanoflagellate self-organization." Proceedings of the National Academy of Sciences 117, no. 3 (2020): 1303–11. http://dx.doi.org/10.1073/pnas.1909447117.

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Inspired by the patterns of multicellularity in choanoflagellates, the closest living relatives of animals, we quantify the biophysical processes underlying the morphogenesis of rosette colonies in the choanoflagellate Salpingoeca rosetta. We find that rosettes reproducibly transition from an early stage of 2-dimensional (2D) growth to a later stage of 3D growth, despite the underlying variability of the cell lineages. Our perturbative experiments demonstrate the fundamental importance of a basally secreted extracellular matrix (ECM) for rosette morphogenesis and show that the interaction of t
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Dissertations / Theses on the topic "Choanoflagellatea"

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Westbrook, Marjorie Wright. "Introns and alternative splicing in choanoflagellates." UNIVERSITY OF CALIFORNIA, BERKELEY, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3498903.

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Wright, Jane. "Choanoflagellates : a STEPP in animal evolution." Thesis, University of York, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423597.

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Marron, Alan Oliver. "Loricate choanoflagellates and the evolution of eukaryotic silica biomineralization." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610410.

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Fritz, Alyce T. "Trophodynamics of estuarine (salt marsh) heterotrophic nanoplankton (microbial ecology, salt marsh ecology, choanoflagellates, Virginia)." W&M ScholarWorks, 1986. https://scholarworks.wm.edu/etd/1539616651.

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Seasonal occurrence and activity of heterotrophic nanoflagellates (HNANO or heteroflagellates) and bacteria were studied in a sheltered brackish water embayment of Chesapeake Bay wetlands (Virginia, USA) over a three year period (1981 - 1984). Epifluorescence direct counts and Scanning and Transmission Electron Microscopy (SEM and TEM) techniques were used for the description of organisms, enumeration, and biomass determinations. Seasonal bacterial growth rates and growth and grazing rates of bactivorous HNANO were estimated using diffusion chambers equipped with Nuclepore polycarbonate membra
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Kirkegaard, Julius Bier. "Physical and stochastic aspects of microorganism behaviour." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277543.

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This thesis studies physical and stochastic aspects of microorganisms. From the point of view of $\textit{physics}$, the studies in this thesis are motivated by the goal of gaining biological insight using the machinery of physics and mathematics. From the point of view of $\textit{biology}$, the studies in this thesis focus primarily on choanoflagellates, eukaryotes that are the closest living unicellular relatives of animals. This choice of model organism was motivated by the important biological question of the origin of multicellularity. Why was it that single-celled organisms evolved to b
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Schiwitza, Sabine [Verfasser], Hartmut [Gutachter] Arndt, and Kathrin [Gutachter] Lampert. "A study on the diversity and ecology of choanoflagellates by integrative taxonomy / Sabine Schiwitza ; Gutachter: Hartmut Arndt, Kathrin Lampert." Köln : Universitäts- und Stadtbibliothek Köln, 2021. http://d-nb.info/1238780156/34.

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Jeuck, Alexandra C. [Verfasser], Hartmut [Akademischer Betreuer] Arndt, and Michael [Akademischer Betreuer] Bonkowski. "Extended phylogeny and morphology of marine and freshwater choanoflagellates with additional methodological studies on heterotrophic flagellates / Alexandra C. Jeuck. Gutachter: Hartmut Arndt ; Michael Bonkowski." Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1063695473/34.

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López, Escardó David 1988. "Unveiling new molecular Opisthokonta diversity : A perspective from evolutionary genomics." Doctoral thesis, Universitat Pompeu Fabra, 2018. http://hdl.handle.net/10803/587085.

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Opisthokonta is an eukaryotic supergroup that contains Metazoa, Fungi and their unicellular relatives. Therefore, this group provides an ideal framework to study distinct unicellular-multicellular transitions, among them, the transition towards animal multicellularity. This thesis aims to describe new Opisthokonta diversity at many different levels, a very neeeded starting point to better understand the evolution of opisthokonts and the origin of multicellularity in animals. In particular, we here described a new genus and species at the onset of Holomycota (Parvularia atlantis), detected new
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Wain, Ashley R. "An Integrated View of Metazoan Evolution." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1437958865.

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Nitsche, Frank [Verfasser]. "Untersuchungen zur Biodiversität, biogeographischen Verbreitung und Phylogenie von Choanoflagellaten - unter besonderer Berücksichtigung der polaren Regionen / vorgelegt von Frank Nitsche." 2007. http://d-nb.info/985317310/34.

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Books on the topic "Choanoflagellatea"

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Pettitt, Michala Elizabeth. Prey capture and ingestion in choanoflagellates. University of Birmingham, 2000.

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Leadbeater, Barry S. C. Choanoflagellates. Cambridge University Press, 2014.

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Leadbeater, Barry S. C. Choanoflagellates: Evolution, Biology and Ecology. Cambridge University Press, 2014.

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Leadbeater, Barry S. C. Choanoflagellates: Evolution, Biology and Ecology. Cambridge University Press, 2015.

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Leadbeater, Barry S. C. Choanoflagellates: Evolution, Biology and Ecology. Cambridge University Press, 2014.

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Leadbeater, Barry S. C. Choanoflagellates: Evolution, Biology and Ecology. Cambridge University Press, 2015.

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Book chapters on the topic "Choanoflagellatea"

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Richter, Daniel J., and Frank Nitsche. "Choanoflagellatea." In Handbook of the Protists. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-28149-0_5.

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Richter, Daniel J., and Frank Nitsche. "Choanoflagellatea." In Handbook of the Protists. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32669-6_5-1.

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Marchant, H. J. "Choanoflagellates in the Antarctic Marine Food Chain." In Antarctic Nutrient Cycles and Food Webs. Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82275-9_39.

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Fairclough, Stephen R. "Choanoflagellates: Perspective on the Origin of Animal Multicellularity." In Evolutionary Transitions to Multicellular Life. Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-017-9642-2_5.

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Thomsen, Helge Abildhauge, and Jacob Larsen. "Loricate choanoflagellates of the Southern Ocean with new observations on cell division in Bicosta spinifera (Throndsen, 1970) from Antarctica and Saroeca attenuata Thomsen, 1979, from the Baltic Sea." In Weddell Sea Ecology. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77595-6_6.

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Leadbeater, Barrys S. C. "Choanoflagellate organization with special reference to loricate taxa." In The Biology of Free-Living Heterotrophic Flagellates. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198577478.003.0017.

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Abstract The choanoflagellates are a large and important group of heterotrophic flagellates. They are easily recognized on account of their spherical to ovoid protoplast with a single flagellum surrounded by a collar of tentacles. Three families are currently recognized but only the Acanthoecidae contains taxa that are found exclusively in saline waters and that possess a lorica composed of silica costae made up of costal strips. The systematics of choanoflagellates is based on lorica substructure and form. These characters are determined by the dimensions and morphology of the component costa
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Nielsen, Claus. "Prelude: Phylum Choanoflagellata." In Animal Evolution. Oxford University Press, 2011. http://dx.doi.org/10.1093/acprof:oso/9780199606023.003.0003.

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Gerdt, Joseph P. "Chemical Ecology of Choanoflagellates." In Comprehensive Natural Products III. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-409547-2.14631-1.

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Jackson, Seamus M., and E. B. Gareth Jones. "Choanoflagellates as fouling organisms." In The Marine Biology of the South China Sea I & II (2 vols.). Hong Kong University Press, 1994. https://doi.org/10.1515/9789882202160-012.

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Thomsen, Helge A., and Kurt R. Buck. "Choanoflagellate diversity with particular emphasis on the Acanthoecidae." In The Biology of Free-Living Heterotrophic Flagellates. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198577478.003.0018.

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Abstract The three choanoflagellate families (Codosigidae, Salpingoecidae, and Acanthoecidae) are distinguished on the basis of differences in periplast structure. Taxonomy at the generic level is chiefly based on periplast details and patterns of colony formation. The majority of the approximately 50 genera characterized here belong to the Acanthoecidae, members of which are characterized by possessing a lorica constructed from silicified rod-like units.
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