keyword
https://read.qxmd.com/read/38458877/recombination-in-bdelloid-rotifer-genomes-asexuality-transfer-and-stress
#1
REVIEW
Christopher G Wilson, Tymoteusz Pieszko, Reuben W Nowell, Timothy G Barraclough
Bdelloid rotifers constitute a class of microscopic animals living in freshwater habitats worldwide. Several strange features of bdelloids have drawn attention: their ability to tolerate desiccation and other stresses, a lack of reported males across the clade despite centuries of study, and unusually high numbers of horizontally acquired, non-metazoan genes. Genome sequencing is transforming our understanding of their lifestyle and its consequences, while in turn providing wider insights about recombination and genome organisation in animals...
March 7, 2024: Trends in Genetics: TIG
https://read.qxmd.com/read/38273318/ionizing-radiation-responses-appear-incidental-to-desiccation-responses-in-the-bdelloid-rotifer-adineta-vaga
#2
JOURNAL ARTICLE
Victoria C Moris, Lucie Bruneau, Jérémy Berthe, Anne-Catherine Heuskin, Sébastien Penninckx, Sylvia Ritter, Uli Weber, Marco Durante, Etienne G J Danchin, Boris Hespeels, Karine Van Doninck
BACKGROUND: The remarkable resistance to ionizing radiation found in anhydrobiotic organisms, such as some bacteria, tardigrades, and bdelloid rotifers has been hypothesized to be incidental to their desiccation resistance. Both stresses produce reactive oxygen species and cause damage to DNA and other macromolecules. However, this hypothesis has only been investigated in a few species. RESULTS: In this study, we analyzed the transcriptomic response of the bdelloid rotifer Adineta vaga to desiccation and to low- (X-rays) and high- (Fe) LET radiation to highlight the molecular and genetic mechanisms triggered by both stresses...
January 25, 2024: BMC Biology
https://read.qxmd.com/read/37993452/horizontal-acquisition-of-a-dna-ligase-improves-dna-damage-tolerance-in-eukaryotes
#3
JOURNAL ARTICLE
Emilien Nicolas, Paul Simion, Marc Guérineau, Matthieu Terwagne, Mathilde Colinet, Julie Virgo, Maxime Lingurski, Anaïs Boutsen, Marc Dieu, Bernard Hallet, Karine Van Doninck
Bdelloid rotifers are part of the restricted circle of multicellular animals that can withstand a wide range of genotoxic stresses at any stage of their life cycle. In this study, bdelloid rotifer Adineta vaga is used as a model to decipher the molecular basis of their extreme tolerance. Proteomic analysis shows that a specific DNA ligase, different from those usually involved in DNA repair in eukaryotes, is strongly over-represented upon ionizing radiation. A phylogenetic analysis reveals its orthology to prokaryotic DNA ligase E, and its horizontal acquisition by bdelloid rotifers and plausibly other eukaryotes...
November 22, 2023: Nature Communications
https://read.qxmd.com/read/37875161/examination-of-gammarid-transcriptomes-reveals-a-widespread-occurrence-of-key-metabolic-genes-from-epibiont-bdelloid-rotifers-in-freshwater-species
#4
JOURNAL ARTICLE
Alberto Ribes-Navarro, Naoki Kabeya, L Filipe C Castro, André Gomes-Dos-Santos, Miguel M Fonseca, Hilke Alberts-Hubatsch, Francisco Hontoria, Juan C Navarro, Óscar Monroig
Previous data revealed the unexpected presence of genes encoding for long-chain polyunsaturated fatty acid (LC-PUFA) biosynthetic enzymes in transcriptomes from freshwater gammarids but not in marine species, even though closely related species were compared. This study aimed to clarify the origin and occurrence of selected LC-PUFA biosynthesis gene markers across all published gammarid transcriptomes. Through systematic searches, we confirmed the widespread occurrence of sequences from seven elongases and desaturases involved in LC-PUFA biosynthesis, in transcriptomes from freshwater gammarids but not marine species, and clarified that such occurrence is independent from the gammarid species and geographical origin...
October 2023: Open Biology
https://read.qxmd.com/read/37621319/-heterocypris-incongruens-maintains-an-egg-bank-in-stormwater-habitats-and-influences-the-development-of-larval-mosquito-culex-restuans
#5
JOURNAL ARTICLE
Jacqueline Trujillo, Cameron D Schwing, Ephantus J Muturi, Carla E Cáceres
Dormant propagules can provide a rapid colonization source for temporary aquatic habitats and set the trajectory for community dynamics, yet the egg banks of stormwater management systems have received little attention. We asked which species hatched from the sediment of drainage ditches in Champaign County, IL, and found bdelloid rotifers and ostracods ( Heterocypris incongruens ) to be the most common taxa. These sites also are colonized by mosquitoes, and we established laboratory experiments to examine interspecific interactions between common co-occurring taxa...
August 2023: Ecology and Evolution
https://read.qxmd.com/read/37414145/biochemical-and-structural-characterization-of-the-first-discovered-metazoan-dna-cytosine-n4-methyltransferase-from-the-bdelloid-rotifer-adineta-vaga
#6
JOURNAL ARTICLE
Jujun Zhou, John R Horton, Gundeep Kaur, Qin Chen, Xuwen Li, Fabian Mendoza, Tao Wu, Robert M Blumenthal, Xing Zhang, Xiaodong Cheng
Much is known about the generation, removal, and roles of 5-methylcytosine (5mC) in eukaryote DNA, and there is a growing body of evidence regarding N6-methyladenine, but very little is known about N4-methylcytosine (4mC) in the DNA of eukaryotes. The gene for the first metazoan DNA methyltransferase generating 4mC (N4CMT) was reported and characterized recently by others, in tiny freshwater invertebrates called bdelloid rotifers. Bdelloid rotifers are ancient, apparently asexual animals, and lack canonical 5mC DNA methyltransferases...
July 4, 2023: Journal of Biological Chemistry
https://read.qxmd.com/read/37042563/high-sensitivity-of-the-antarctic-rotifer-adineta-editae-to-metals-and-ecological-relevance-in-contaminated-site-risk-assessments
#7
JOURNAL ARTICLE
Kathryn E Brown, Darren J Koppel, Gwilym A V Price, Catherine K King, Merrin S Adams, Dianne F Jolley
Anthropogenic activities in Antarctica have led to contamination of terrestrial sites, and soils in ice-free areas have elevated concentrations of metals, particularly around current and historic research stations. Effective management of Antarctic contaminated sites depends on the assessment of risks to a representative range of native terrestrial species. Bdelloid rotifers are an abundant and biodiverse component of Antarctic limno-terrestrial communities, and play a key role in nutrient cycling in Antarctic ecosystems...
April 12, 2023: Environmental Toxicology and Chemistry
https://read.qxmd.com/read/37024917/back-to-the-roots-desiccation-and-radiation-resistances-are-ancestral-characters-in-bdelloid-rotifers
#8
JOURNAL ARTICLE
Boris Hespeels, Diego Fontaneto, Valérie Cornet, Sébastien Penninckx, Jérémy Berthe, Lucie Bruneau, James W Larrick, Eloïse Rapport, Jérémie Bailly, Nicolas Debortoli, Nataliia Iakovenko, Karel Janko, Anne-Catherine Heuskin, Stéphane Lucas, Bernard Hallet, Karine Van Doninck
BACKGROUND: Bdelloid rotifers are micro-invertebrates distributed worldwide, from temperate latitudes to the most extreme areas of the planet like Antarctica or the Atacama Desert. They have colonized any habitat where liquid water is temporarily available, including terrestrial environments such as soils, mosses, and lichens, tolerating desiccation and other types of stress such as high doses of ionizing radiation (IR). It was hypothesized that bdelloid desiccation and radiation resistance may be attributed to their potential ability to repair DNA double-strand breaks (DSBs)...
April 7, 2023: BMC Biology
https://read.qxmd.com/read/36449626/dna-repair-during-nonreductional-meiosis-in-the-asexual-rotifer-adineta-vaga
#9
JOURNAL ARTICLE
Matthieu Terwagne, Emilien Nicolas, Boris Hespeels, Ludovic Herter, Julie Virgo, Catherine Demazy, Anne-Catherine Heuskin, Bernard Hallet, Karine Van Doninck
Rotifers of the class Bdelloidea are microscopic animals notorious for their long-term persistence in the apparent absence of sexual reproduction and meiotic recombination. This evolutionary paradox is often counterbalanced by invoking their ability to repair environmentally induced genome breakage. By studying the dynamics of DNA damage response in the bdelloid species Adineta vaga , we found that it occurs rapidly in the soma, producing a partially reassembled genome. By contrast, germline DNA repair is delayed to a specific time window of oogenesis during which homologous chromosomes adopt a meiotic-like juxtaposed configuration, resulting in accurate reconstitution of the genome in the offspring...
December 2, 2022: Science Advances
https://read.qxmd.com/read/36101130/descriptions-of-philodinavus-koreanus-n-sp-and-two-new-species-of-philodina-rotifera-bdelloidea-from-korea
#10
JOURNAL ARTICLE
Min Ok Song, Chang-Ho Lee
The bdelloid rotifers collected from terrestrial habitats such as leaf litter, mosses and tree barks were studied and three new species were identified: Philodina haejooni n. sp., P. hongcheonensis n. sp. and Philodinavus koreanus n. sp. Philodina haejooni n. sp. is easily distinguished from its congeners by the leaf margin-shaped longitudinal ridges on trunk. The most significant diagnostic characteristic of Philodina hongcheonensis n. sp. is the four dorsal hemispherical processes on anal pseudosegment. Philodinavus koreanus n...
April 28, 2022: Zootaxa
https://read.qxmd.com/read/36000877/translational-biomedicine-oriented-exploratory-research-on-bioactive-rotifer-specific-biopolymers
#11
EDITORIAL
Zsolt Datki, Rita Sinka
There are numerous surprising discoveries in current comprehensive biopolymer research, including the description of new types of biopolymers and the extension of their applications. The discovery of a new rotifer-specific biopolymer family (Rotimers) and the exceptional ability of these micrometazoans to inactivate and catabolize human-type neurotoxic aggregates (e.g., beta-amyloids, alpha-synucleins, prions) by their exudates can be mentioned as the original work of our research group. Rotimers are exogenous and protein complex molecules with a calcium-dependent production mechanism in both bdelloid and monogonant rotifers...
August 24, 2022: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://read.qxmd.com/read/35588974/particle-dependent-reproduction-and-exogenic-biopolymer-secretion-of-protozoa-co-cultured-rotifers
#12
JOURNAL ARTICLE
Zsolt Datki, Rita Sinka, Bence Galik, Zita Galik-Olah
The rotifer-specific exogenic biopolymer, named Rotimer and its related molecular processes are affected by physical and chemical factors (e.g., temperature, pH or metal ions); however, the study of biological influences (e.g., the presence protozoa) concerning the particle-dependent reproduction (egg laying) and 'biopolymer producing capacity' (BPC) of rotifers is the objective of the present work. Non-planktonic rotifer species (Philodina acuticornis, Adineta vaga, Euchlanis dilatata, and Lecane bulla) were studied in paired micrometazoa-protozoa co-cultures involving Paramecium, Diplonema, and Amoeba...
May 16, 2022: International Journal of Biological Macromolecules
https://read.qxmd.com/read/35555396/investigating-the-function-of-a-unique-dna-ligase-ligk-in-bdelloid-rotifers
#13
JOURNAL ARTICLE
Andrew M Schurko, Halie J Booth
Bdelloid rotifers are a class of microscopic invertebrates with an extraordinary DNA repair system that allows individuals to recover from DNA damage induced by desiccation or ionizing radiation. While this DNA repair system provides a potential means for surviving harsh conditions, the mechanism for DNA repair is not understood. Previous work determined that the gene encoding DNA ligase K (LIGK) is upregulated in the bdelloid Adineta vagafollowing exposure to ionizing radiation, suggesting a role for the LIGK protein in DNA repair...
May 2022: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://read.qxmd.com/read/35385763/preliminary-investigation-of-effects-of-copper-on-a-terrestrial-population-of-the-antarctic-rotifer-philodina-sp
#14
JOURNAL ARTICLE
Jordan S McCarthy, Stephanie M N Wallace, Kathryn E Brown, Catherine K King, Uffe N Nielsen, Graeme Allinson, Suzie M Reichman
Terrestrial microinvertebrates in Antarctica are potentially exposed to contaminants due to the concentration of human activity on ice-free areas of the continent. As such, knowledge of the response of Antarctic microinvertebrates to contaminants is important to determine the extent of anthropogenic impacts. Endemic Antarctic Philodina sp. were extracted from soils and mosses at Casey station, East Antarctica and exposed to aqueous Cu for 96 h. The Philodina sp. was sensitive to excess Cu, with concentrations of 36 μg L-1 Cu (48 h) and 24 μg L-1 Cu (96 h) inhibiting activity by 50%...
April 3, 2022: Chemosphere
https://read.qxmd.com/read/34888647/genomic-signature-of-sexual-reproduction-in-the-bdelloid-rotifer-macrotrachella-quadricornifera
#15
JOURNAL ARTICLE
Veronika N Laine, Timothy Sackton, Matthew Meselson
Bdelloid rotifers, common freshwater invertebrates of ancient origin and worldwide distribution have long been thought to be entirely asexual, being the principal exception to the view that in eukaryotes the loss of sex leads to early extinction. That bdelloids are facultatively sexual is shown by a study of allele sharing within a group of closely related bdelloids of the species Macrotrachella quadricornifera, supporting the view that sexual reproduction is essential for long-term success in all eukaryotes...
December 9, 2021: Genetics
https://read.qxmd.com/read/34255978/parallel-evolution-of-trehalose-production-machinery-in-anhydrobiotic-animals-via-recurrent-gene-loss-and-horizontal-transfer
#16
JOURNAL ARTICLE
Yuichiro Hara, Reira Shibahara, Koyuki Kondo, Wataru Abe, Takekazu Kunieda
Trehalose is a versatile non-reducing sugar. In some animal groups possessing its intrinsic production machinery, it is used as a potent protectant against environmental stresses, as well as blood sugar. However, the trehalose biosynthesis genes remain unidentified in the large majority of metazoan phyla, including vertebrates. To uncover the evolutionary history of trehalose production machinery in metazoans, we scrutinized the available genome resources and identified bifunctional trehalose-6-phosphate synthase-trehalose-6-phosphate phosphatase (TPS-TPP) genes in various taxa...
July 2021: Open Biology
https://read.qxmd.com/read/34186638/an-extraordinary-new-fluvial-bdelloid-rotifer-coronistomus-impossibilis-gen-nov-sp-nov-with-adaptations-for-turbulent-flow-rotifera-bdelloidea-coronistomidae-fam-nov
#17
JOURNAL ARTICLE
Aydin Örstan
A new bdelloid rotifer, Coronistomus impossibilis gen. nov., sp. nov. is described from the Hawlings River in Maryland, USA. The new species is a non-swimming sediment dweller that exceeds 550 µm in body length. Its corona is a weakly bilobed ciliated field on the ventral side of the head with lateral borders continuing into mouth. The species has ramate trophi that have on each half three widely spaced major teeth with two interproximal teeth. The foot lacks spurs and ends with a pair of long, thick ventral toes and a medially positioned caudal appendage...
April 30, 2021: Zootaxa
https://read.qxmd.com/read/34112085/18s-rrna-variability-maps-reveal-three-highly-divergent-conserved-motifs-within-rotifera
#18
JOURNAL ARTICLE
Olaf R P Bininda-Emonds
BACKGROUND: 18S rRNA is a major component of the small subunit of the eukaryotic ribosome and an important phylogenetic marker for many groups, often to the point of being the only marker available for some. A core structure across eukaryotes exists for this molecule that can help to inform about its evolution in different groups. Using an alignment of 18S rDNA for Rotifera as traditionally recognized (=Bdelloidea, Monogononta, and Seisonacea, but not Acanthocephala), I fitted sequences for three exemplar species (Adineta vaga, Brachionus plicatilis, and Seison nebaliae, respectively) to the core structure and used these maps to reveal patterns of evolution for the remainder of this diverse group of microscopic animals...
June 10, 2021: BMC ecology and evolution
https://read.qxmd.com/read/34102116/a-living-bdelloid-rotifer-from-24-000-year-old-arctic-permafrost
#19
JOURNAL ARTICLE
Lyubov Shmakova, Stas Malavin, Nataliia Iakovenko, Tatiana Vishnivetskaya, Daniel Shain, Michael Plewka, Elizaveta Rivkina
In natural, permanently frozen habitats, some organisms may be preserved for hundreds to tens of thousands of years. For example, stems of Antarctic moss were successfully regrown from an over millennium-old sample covered by ice for about 400 years1 . Likewise, whole campion plants were regenerated from seed tissue preserved in relict 32,000-year-old permafrost2 , and nematodes were revived from the permafrost of two localities in northeastern Siberia, with source sediments dated over 30,000 years BP3 . Bdelloid rotifers, microscopic multicellular animals, are known for their ability to survive extremely low temperatures4 ...
June 7, 2021: Current Biology: CB
https://read.qxmd.com/read/33543711/evolutionary-dynamics-of-transposable-elements-in-bdelloid-rotifers
#20
JOURNAL ARTICLE
Reuben W Nowell, Christopher G Wilson, Pedro Almeida, Philipp H Schiffer, Diego Fontaneto, Lutz Becks, Fernando Rodriguez, Irina R Arkhipova, Timothy G Barraclough
Transposable elements (TEs) are selfish genomic parasites whose ability to spread autonomously is facilitated by sexual reproduction in their hosts. If hosts become obligately asexual, TE frequencies and dynamics are predicted to change dramatically, but the long-term outcome is unclear. Here, we test current theory using whole-genome sequence data from eight species of bdelloid rotifers, a class of invertebrates in which males are thus far unknown. Contrary to expectations, we find a variety of active TEs in bdelloid genomes, at an overall frequency within the range seen in sexual species...
February 5, 2021: ELife
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