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Items tagged with: giantViruses
Giant virus encodes key piece of protein-making machinery of cellular life
"Viruses are integral to the functioning of ocean ecosystems, influencing biological productivity, shifting community interactions, and driving evolutionary change,"
phys.org/news/2024-12-giant-vi…
#viruses #microbiology #GiantViruses #protists
Giant virus encodes key piece of protein-making machinery of cellular life
Researchers at the University of Hawai'i at Mānoa have discovered that a virus, FloV-SA2, encodes one of the proteins needed to make ribosomes, the central engines in all cells that translate genetic information into proteins, the building blocks of …Marcie Grabowski (Phys.org)
Genomic analyses of Symbiomonas scintillans show no evidence for endosymbiotic bacteria but does reveal the presence of giant viruses
Author summary Endosymbiotic bacteria are found in a wide variety of hosts across the tree of eukaryotes and have been proposed to be evolutionarily and ecologically significant, but in most cases, we know little to nothing about them.journals.plos.org
Giant viral signatures on the Greenland ice sheet
doi.org/10.1186/s40168-024-017…
Giant viral signatures on the Greenland ice sheet - Microbiome
Background Dark pigmented snow and glacier ice algae on glaciers and ice sheets contribute to accelerating melt. The biological controls on these algae, particularly the role of viruses, remain poorly understood.BioMed Central
A giant virus infecting the amoeboflagellate Naegleria
nature.com/articles/s41467-024…
#viruses #giantViruses #microbiology
A giant virus infecting the amoeboflagellate Naegleria - Nature Communications
This is the first report on a virus infecting the amoeboflagellate Naegleria, including the lethal human pathogen N. fowleri.Nature
Another interesting study suggesting that giant viruses can control phototaxis in their hosts during infection
"Hijacking of internal calcium dynamics by intracellularly residing viral rhodopsins"
"... we show here that light irradiation reversibly modified tail movements of OLPVR1-expressing frog tadpoles."
nature.com/articles/s41467-023…
#viruses #GiantViruses #virology
Hijacking of internal calcium dynamics by intracellularly residing viral rhodopsins - Nature Communications
Rhodopsins are ubiquitous light-driven membrane proteins that have diverse functions in nature, and value as optogenetics tools.Nature
Gene duplication as a major force driving the genome expansion in some giant viruses
Kratosvirus quantuckense: the history and novelty of an algal bloom disrupting virus and a model for giant virus research
doi.org/10.3389/fmicb.2023.128…
#viruses #marine #ocean #HAB #GiantViruses
Kratosvirus quantuckense: the history and novelty of an algal bloom disrupting virus and a model for giant virus research
Since the discovery of the first “giant virus,” particular attention has been paid toward isolating and culturing these large DNA viruses through Acanthamoeba spp. bait systems.Frontiers
Latest taxonomic update for giant viruses, including a new name for the famous mimivirus (now Mimivirus bradfordmassiliense)
Taxonomy for the titans of the virosphere!
link.springer.com/article/10.1…
#GiantViruses #viruses #virology
Taxonomic update for giant viruses in the order Imitervirales (phylum Nucleocytoviricota) - Archives of Virology
Large DNA viruses in the phylum Nucleocytoviricota, sometimes referred to as “giant viruses” owing to their large genomes and virions, have been the subject of burgeoning interest over the last decade.SpringerLink
Bizarre giant viruses with tubular tentacles and star-like shells discovered in New England forest
Giant viruses are much more diverse in shape and size than scientists previously thought, according to a new study.
livescience.com/planet-earth/m… #GiantViruses #tentacles #NewEngland #shells #diverse
#GiantViruses encode many strange genes in their genomes - partial TCA cycles, actins and myosins, nutrient transporters, etc
What are they doing with all of these crazy genes?
We discuss this in a recent article - big thanks to all of the collaborators who were willing to help write an extensive review!
Virologs, viral mimicry, and #virocell metabolism: the expanding scale of cellular functions encoded in the complex genomes of giant #viruses
Virophages are viruses that infect giant viruses, typically resulting in a lower burst size for the giant virus. In our latest preprint we report virophage-like sequences associated with insect poxviruses.
Their genomes of these elements are really interesting. This also opens up the possibility that hyperparasitic viruses are associated with a much broader range of DNA viruses than is commonly thought.
doi.org/10.1101/2023.10.16.562…
#viruses #virology #poxviruses #GiantViruses
Polinton-like Viruses Associated with Entomopoxviruses Provide Insight into Replicon Evolution
Polinton-like viruses (PLVs) are a diverse group of small integrative dsDNA viruses that infect diverse eukaryotic hosts. Many PLVs are hypothesized to parasitize viruses in the phylum Nucleocytoviricota for their own propagation and spread.bioRxiv
Nice study on polar giant viruses!
Genomic adaptation of giant viruses in polar oceans
nature.com/articles/s41467-023…
#viruses #GiantViruses #virology #oceanography #marine #ocean #polar
Genomic adaptation of giant viruses in polar oceans - Nature Communications
This study examines the biogeography and functional gene repertoires of marine eukaryote-infecting large and giant DNA viruses.Nature
A fantastical world of potential giant viruses lurks beneath the soil
"These and other peculiar-looking shapes “clearly tell us that we’ve underestimated how structurally diverse these viruses are,”"
sciencenews.org/article/potent…
A fantastical world of potential giant viruses lurks beneath the soil
Giant viruses were already known for their large sizes. A close look at a scoop of soil shows that they may come in a variety of funky shapes as well.Meghan Rosen (Science News Magazine)
Phylogenetic diversity and functional potential of large and cell-associated viruses in the Bay of Bengal
biorxiv.org/content/10.1101/20…
#viruses #ecology #marine #ocean #giantViruses
Phylogenetic diversity and functional potential of large and cell-associated viruses in the Bay of Bengal
The Bay of Bengal (BoB), the largest bay in the world, provides valuable ecosystem services such as fishing and recreation to millions of people living along its coast and has a significant economic value.bioRxiv
Hello everyone!
I’m an associate prof at Virginia Tech studying viral diversity. Lately my group has been focusing on giant viruses, but we are also interested in other protist viruses, and the role of viral endogenization in host genome evolution.
#GiantViruses #ViralDiversity #TreeOfLife #Protists #Microbiology #Bioinformatics #Evolution #Virology #Genomics
Recently we have been examining the strange and complex genes encoded in giant virus genomes!
doi.org/10.1093/femsre/fuad053
Amazing structural diversity of giant virus-like particles in forest soil
biorxiv.org/content/10.1101/20…
#viruses #giantViruses #microbiology
Amazing structural diversity of giant virus-like particles in forest soil
Large DNA viruses of the phylum Nucleocytoviricota infect diverse eukaryotic hosts from protists to humans, with profound consequences for aquatic and terrestrial ecosystems.bioRxiv
Happy to share a collaborative preprint with Assaf Vardi's group in which we use single cell transcriptomics to link giant viruses with their native hosts during a marine algal bloom!
This approach is quite sensitive - we were able to identify viruses infecting one protist group that made up <0.5% of the community.
Homing in on the rare virosphere reveals the native host of giant viruses
biorxiv.org/content/10.1101/20…
#viruses #giantViruses #ocean #marine
Homing in on the rare virosphere reveals the native host of giant viruses
Giant viruses (phylum Nucleocytoviricota) are globally distributed in aquatic ecosystems They play major roles as evolutionary drivers of eukaryotic plankton and regulators of global biogeochemical cycles.bioRxiv
It's been a big mystery why giant viruses encode so many proteins involved in vesicular transport and cytoskeletal dynamics. This interesting paper examined a dynamin homolog and found evidence that it's involved in mitochondrial membrane remodelling during infection.
A Novel Group of Dynamin-Related Proteins Shared by Eukaryotes and Giant Viruses Is Able to Remodel Mitochondria From Within the Matrix
academic.oup.com/mbe/article/4…
#viruses #GiantViruses #virology
A Novel Group of Dynamin-Related Proteins Shared by Eukaryotes and Giant Viruses Is Able to Remodel Mitochondria From Within the Matrix
Abstract. The diverse GTPases of the dynamin superfamily play various roles in the cell, as exemplified by the dynamin-related proteins (DRPs) Mgm1 and Opa1, whSheikh, Shaghayegh (Oxford University Press)
Our latest work on marine giant virus diversity -
Assessing the biogeography of marine giant viruses in four oceanic transects
nature.com/articles/s43705-023…
#viruses #marine #ocean #giantviruses
Assessing the biogeography of marine giant viruses in four oceanic transects - ISME Communications
ISME Communications - Assessing the biogeography of marine giant viruses in four oceanic transectsNature
Important study describing a new phylum of herpesvirus relatives that is abundant in the ocean -
Mirusviruses link herpesviruses to giant viruses
nature.com/articles/s41586-023…
I was honored to be asked to review this paper! Wonderful work.
#virology #viruses #herpesviruses #giantViruses
Mirusviruses link herpesviruses to giant viruses - Nature
A phylogeny-guided genome-resolved metagenomic analysis of DNA viruses in the ocean reveals atypical plankton-infecting relatives of herpesviruses that form a putative new phylum dubbed Mirusviricota.Nature
Near-atomic architecture of Singapore grouper iridovirus and implications for giant virus assembly
"The viral inner membrane-integrated anchor protein colocalizes with the endoplasmic reticulum (ER), supporting the hypothesis that the biogenesis of the inner membrane is associated with the ER"
Nice confirmation about where the viral inner membrane comes from.
nature.com/articles/s41467-023…
#viruses #giantViruses #virology
Near-atomic architecture of Singapore grouper iridovirus and implications for giant virus assembly - Nature Communications
High morbidity and mortality in aquatic have been caused by iridovirids worldwide. Here the authors present a near-atomic SGIV capsid structure. Functional assays further reveal the relationships between identified capsid proteins and viral assembly.Nature
Widespread Distribution and Evolution of Poxviral Entry-Fusion Complex Proteins in Giant Viruses
Giant Virus Infection Signatures Are Modulated by Euphotic Zone Depth Strata and Iron Regimes of the Subantarctic Southern Ocean