In this study, a previously little-studied group of viruses-virophages-was searched for and identified in the viromes of the ancient oligotrophic Lake Baikal. Virophages are small dsDNA viruses that parasitize giant viruses (e.g., ), which in turn affect unicellular eukaryotes. We analyzed eight viromes obtained from the deep-water areas of three basins of Lake Baikal and the shallow-water strait Maloye More in different seasons. The sequences of virophages were revealed in all viromes and were dominant after bacteriophages and algal viruses. Sixteen putative complete genomes of virophages were assembled, all of which contained four conserved genes encoding major capsid protein (MCP), minor capsid protein (mCP), maturation cysteine protease (PRO), and FtsK-HerA family DNA-packaging ATPase (ATPase). The MCP-based cluster analysis showed a sequence separation according to seasons, and a dependence on the geographical localization was not detected.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10741620 | PMC |
| http://dx.doi.org/10.3390/biom13121773 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Curious Case of Eulimnogammarus cyaneus (Dybowsky, 1874): Reproductive Biology of a Widespread Endemic Littoral Amphipod From Lake Baikal.
J Exp Zool A Ecol Integr Physiol
December 2024
Irkutsk State University, Irkutsk, Russia.
Comparative studies of reproductive biology and formation of reproductive isolation need appropriate model systems, such as groups of related species. The amphipods (Crustacea: Amphipoda) of ancient Lake Baikal are an attractive group for such works, as they consist of several hundred species that radiated within the lake and have very different levels of intraspecific genetic diversity and reproduction timing. We have previously shown that one of the most widely distributed and best studied littoral species, Eulimnogammarus verrucosus (Gersfeldt, 1858), comprises cryptic species exhibiting a post-zygotic reproductive barrier.
View Article and Find Full Text PDFWhole-genome re-sequencing of the Baikal seal and other phocid seals for a glimpse into their genetic diversity, demographic history, and phylogeny.
GigaByte
November 2024
Institute for Ecology, Evolution and Diversity, Goethe University, Max-von-Laue-Strasse. 9, Frankfurt am Main, 60438, Germany.
Article Synopsis
- The Baikal seal, a freshwater seal unique to Lake Baikal, has a long history of being landlocked and is classified as a species of least concern due to its stable population despite its limited habitat.
- Recent research has expanded on genetic studies by sequencing the genomes of six Baikal seals alongside other seal species, enhancing our understanding of their evolutionary relationships.
- Findings indicate that the genetic diversity of the Baikal seal is comparable to that of other seals, prompting calls for further research on genomic diversity across its range.
Dominant atmospheric circulation patterns associated with the rapid intensification of summer flash droughts in Eastern China.
Sci Total Environ
December 2024
Key Laboratory of Hydrometeorological Disaster Mechanism and Warning of Ministry of Water Resources/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China; School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China.
Flash droughts (FDs), which are characterized by rapid intensification, occurred frequently over Eastern China, posing great challenges for drought forecasting and preparation on subseasonal timescale. However, the drivers of the rapid development of FDs are not well understood. By comparing with slow droughts (SDs), this study investigates the dominant physical processes responsible for FDs in four different regions over Eastern China through diagnosing moisture budgets and further linking them to large-scale atmospheric circulation patterns.
View Article and Find Full Text PDFMajor Histocompatibility Complex Class II Genes Allele Diversity in Landlocked Seals.
J Hered
November 2024
A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow.
The allelic diversity of exon 2 (DQB gene) and exon 3 (DRB gene) of major histocompatibility complex class II was studied for the first time in two species of the landlocked pinnipeds, Baikal (N = 79) and Caspian (N = 32) seals, and these were in compared with the widespread Arctic species, the ringed seal (N = 13). The analysis of the second exon comprising the antigen-binding region revealed high allelic diversity in all three species but the pattern of the diversity was the most specific for the Baikal seal. This species differs from the other two by the smallest number of alleles in the population, yet they have the largest number of alleles per individual and by the maximum similarity of individual genotypes.
View Article and Find Full Text PDFNomenclature and systematics of two species (Bacillariophyta) from Lake Baikal: and .
PhytoKeys
October 2024
К.А. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia К.А. Timiryazev Institute of Plant Physiology RAS, IPP RAS Moscow Russia.
The study provides nomenclatural history, morphological characteristics and taxonomy of and described by B.V. Skvortzov from Lake Baikal.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!