The polinton-like supergroup of viruses: evolution, molecular biology, and taxonomy

EV Koonin, MG Fischer, JH Kuhn… - … and Molecular Biology …, 2024 - journals.asm.org
SUMMARY Polintons are 15–20 kb-long self-synthesizing transposons that are widespread
in eukaryotic, and in particular protist, genomes. Apart from a transposase and a protein …

How viruses shape microbial plankton microdiversity

F Rodriguez-Valera, C Bellas - Annual Review of Marine …, 2024 - annualreviews.org
One major conundrum of modern microbiology is the large pangenome (gene pool) present
in microbes, which is much larger than those found in complex organisms such as humans …

Large-scale invasion of unicellular eukaryotic genomes by integrating DNA viruses

C Bellas, T Hackl, MS Plakolb… - Proceedings of the …, 2023 - National Acad Sciences
Eukaryotic genomes contain a variety of endogenous viral elements (EVEs), which are
mostly derived from RNA and ssDNA viruses that are no longer functional and are …

Seasonal dynamics and diversity of Antarctic marine viruses reveal a novel viral seascape

GJ Piedade, ME Schön, C Lood, MV Fofanov… - Nature …, 2024 - nature.com
Abstract The Southern Ocean microbial ecosystem, with its pronounced seasonal shifts, is
vulnerable to the impacts of climate change. Since viruses are key modulators of microbial …

Endogenous virophages are active and mitigate giant virus infection in the marine protist Cafeteria burkhardae

A Koslová, T Hackl, F Bade… - Proceedings of the …, 2024 - National Acad Sciences
Endogenous viral elements (EVEs) are common genetic passengers in various protists.
Some EVEs represent viral fossils, whereas others are still active. The marine heterotrophic …

DNA polymerase diversity reveals multiple incursions of Polintons during nematode evolution

DE Jeong, S Sundrani, RN Hall… - Molecular Biology …, 2023 - academic.oup.com
Polintons are double-stranded DNA, virus-like self-synthesizing transposons widely found in
eukaryotic genomes. Recent metagenomic discoveries of Polinton-like viruses are …

Long-Read–Based Genome Assembly Reveals Numerous Endogenous Viral Elements in the Green Algal Bacterivore Cymbomonas tetramitiformis

Y Gyaltshen, A Rozenberg, A Paasch… - Genome Biology and …, 2023 - academic.oup.com
The marine tetraflagellate Cymbomonas tetramitiformis has drawn attention as an early
diverging green alga that uses a phago-mixotrophic mode of nutrition (ie, the ability to derive …

Complex transcriptional regulations of a hyperparasitic quadripartite system in giant viruses infecting protists

A Bessenay, H Bisio, L Belmudes, Y Couté… - Nature …, 2024 - nature.com
Hyperparasitism is a common pattern in nature that is not limited to cellular organisms. Giant
viruses infecting protists can be hyperparasitized by smaller ones named virophages. In …

Virophages—Known and Unknown Facts

B Tokarz-Deptuła, S Chrzanowska, N Gurgacz… - Viruses, 2023 - mdpi.com
The paper presents virophages, which, like their host, giant viruses, are “new” infectious
agents whose role in nature, including mammalian health, is important. Virophages, along …

Genomic analysis of hyperparasitic viruses associated with entomopoxviruses

ZK Barth, I Hicklin, J Thézé, J Takatsuka… - Virus …, 2024 - academic.oup.com
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 …