Results 71 to 80 of about 459 (133)

Ecogenomics of virophages and their giant virus hosts assessed through time series metagenomics

Nature Communications, 2017
Virophages are recently-identified small viruses that infect larger viruses, yet their diversity and ecological roles are poorly understood. Here, Roux and colleagues present time series metagenomics data revealing new virophage genera and their putative
Simon Roux, Leong-Keat Chan, Rob Egan, Rex R. Malmstrom, Katherine D. McMahon, Matthew B. Sullivan   +5 more
doaj   +1 more source

Genome and Environmental Activity of a Chrysochromulina parva Virus and Its Virophages

Frontiers in Microbiology, 2019
Some giant viruses are ecological agents that are predicted to be involved in the top-down control of single-celled eukaryotic algae populations in aquatic ecosystems.
Joshua M. A. Stough, Natalya Yutin, Yuri V. Chaban, Mohammed Moniruzzaman, Eric R. Gann, Helena L. Pound, Morgan M. Steffen, Jenna N. Black, Eugene V. Koonin, Steven W. Wilhelm, Steven M. Short   +10 more
doaj   +1 more source

Giant viruses of amoebas: an update

Frontiers in Microbiology, 2016
During the 12 past years, five new or putative virus families encompassing several members, namely Mimiviridae, Marseilleviridae, pandoraviruses, faustoviruses, and virophages were described.
Sarah eAherfi, Sarah eAherfi, Philippe eColson, Philippe eColson, Bernard eLa Scola, Bernard eLa Scola, Didier eRaoult, Didier eRaoult   +7 more
doaj   +1 more source

Virophage control of antarctic algal host–virus dynamics [PDF]

Proceedings of the National Academy of Sciences, 2011
Viruses are abundant ubiquitous members of microbial communities and in the marine environment affect population structure and nutrient cycling by infecting and lysing primary producers. Antarctic lakes are microbially dominated ecosystems supporting truncated food webs in which viruses exert a major influence on the microbial loop.
Sheree, Yau, Federico M, Lauro, Matthew Z, DeMaere, Mark V, Brown, Torsten, Thomas, Mark J, Raftery, Cynthia, Andrews-Pfannkoch, Matthew, Lewis, Jeffrey M, Hoffman, John A, Gibson, Ricardo, Cavicchioli   +10 more
openaire   +2 more sources

The “Neglected Viruses” of Taihu: Abundant Transcripts for Viruses Infecting Eukaryotes and Their Potential Role in Phytoplankton Succession

Frontiers in Microbiology, 2020
Drivers of algal bloom dynamics remain poorly understood, but viruses have been implicated as important players. Research addressing bloom dynamics has generally been restricted to the virus-infection of the numerically dominant (i.e. bloom forming) taxa.
Helena L. Pound, Eric R. Gann, Xiangming Tang, Lauren E. Krausfeldt, Matthew Huff, Margaret E. Staton, David Talmy, Steven W. Wilhelm   +7 more
doaj   +1 more source

The origins of giant viruses, virophages and their relatives in host genomes [PDF]

BMC Biology, 2014
Giant viruses have revealed a number of surprises that challenge conventions on what constitutes a virus. The Samba virus newly isolated in Brazil expands the known distribution of giant mimiviruses to a near-global scale. These viruses, together with the transposon-related virophages that infect them, pose a number of questions about their ...
Katzourakis, A, Aswad, A
openaire   +2 more sources

Giant virus vs amoeba: fight for supremacy

Virology Journal, 2019
Since the discovery of mimivirus, numerous giant viruses associated with free-living amoebae have been described. The genome of giant viruses can be more than 2.5 megabases, and virus particles can exceed the size of many bacteria.
Graziele Oliveira, Bernard La Scola, Jônatas Abrahão   +2 more
doaj   +1 more source

Discovery and Further Studies on Giant Viruses at the IHU Mediterranee Infection That Modified the Perception of the Virosphere

Viruses, 2019
The history of giant viruses began in 2003 with the identification of Acanthamoeba polyphaga mimivirus. Since then, giant viruses of amoeba enlightened an unknown part of the viral world, and every discovery and characterization of a new giant virus ...
Clara Rolland, Julien Andreani, Amina Cherif Louazani, Sarah Aherfi, Rania Francis, Rodrigo Rodrigues, Ludmila Santos Silva, Dehia Sahmi, Said Mougari, Nisrine Chelkha, Meriem Bekliz, Lorena Silva, Felipe Assis, Fábio Dornas, Jacques Yaacoub Bou Khalil, Isabelle Pagnier, Christelle Desnues, Anthony Levasseur, Philippe Colson, Jônatas Abrahão, Bernard La Scola   +20 more
doaj   +1 more source

Structural and Mechanistic Analyses Reveal a Unique Cas4-like Protein in the Mimivirus Virophage Resistance Element System

iScience, 2018
Summary: A clustered regularly interspaced short palindromic repeats (CRISPR)-like “mimivirus virophage resistance element” (MIMIVIRE) system, which contains specific cascade genes and a CRISPR array against virophages, was reported in mimiviruses.
Chao Dou, Mingjing Yu, Yijun Gu, Jinjing Wang, Kun Yin, Chunlai Nie, Xiaofeng Zhu, Shiqian Qi, Yuquan Wei, Wei Cheng   +9 more
doaj   +1 more source

Metagenomic Characterization of the Viral Community of the South Scotia Ridge

Viruses, 2019
Viruses are the most abundant biological entities in aquatic ecosystems and harbor an enormous amount of genetic diversity. Whereas their influence on marine ecosystems is widely acknowledged, current information about their diversity remains limited. We
Qingwei Yang, Chen Gao, Yong Jiang, Min Wang, Xinhao Zhou, Hongbing Shao, Zheng Gong, Andrew McMinn   +7 more
doaj   +1 more source