数字农科院2.0

Conserved untranslated regions of multipartite viruses: Natural markers of novel viral genomic components and tags of viral evolution

文献类型： 外文期刊

作者： Song Zhang;Caixia Yang;Yuanjian Qiu;Ruiling Liao;Zhiyou Xuan;Fang Ren;Yafeng Dong;Xiaoying Xie;Yanhong Han;Di Wu;Pedro Luis Ramos-González;Juliana Freitas-Astúa;Huadong Yang;Changyong Zhou;Mengji Cao

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关键词： multipartite viruses;phylogenetics;untranslated regions;virus evolution

期刊名称： Virus Evolution

ISSN： 2057-1577

年卷期： 2024 年 10 卷 1 期

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收录情况： SCIE（2024版）

摘要： Viruses with split genomes are classified as being either segmented or multipartite based on whether their genomic segments occur within a single virion or across different virions. Despite variations in number and sequence during evolution, the genomic segments of many viruses are conserved within the untranslated regions (UTRs). In this study, we present a methodology that combines RNA sequencing with iterative BLASTn of UTRs (https://github.com/qq371260/Iterative-blast-v.1.0) to identify new viral genomic segments. Some novel multipartite-like viruses related to the phylum Kitrinoviricota were annotated using sequencing data from field plant samples and public databases. We identified potentially plant-infecting jingmen-related viruses (order Amarillovirales) and jivi-related viruses (order Martellivirales) with at least six genomic components. The number of RNA molecules associated with a genome of the novel viruses in the families Closteroviridae, Kitaviridae, and Virgaviridae within the order Martellivirales reached five. Several of these viruses seem to represent new taxa at the subgenus, genus, and family levels. The diversity of novel genomic components and the multiple duplication of proteins or protein domains within single or multiple genomic components emphasize the evolutionary roles of genetic recombination (horizontal gene transfer), reassortment, and deletion. The relatively conserved UTRs at the genome level might explain the relationships between monopartite and multipartite viruses, as well as how subviral agents such as defective RNAs and satellite viruses can coexist with their helper viruses.

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