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Metagenomic characterization of the viral community of the South Scotia Ridge

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Yang, Q, Gao, C, Jiang, Y, Wang, M, Zhou, X, Shao, H, Gong, Z and McMinn, A ORCID: 0000-0002-2133-3854 2019 , 'Metagenomic characterization of the viral community of the South Scotia Ridge' , Viruses, vol. 11, no. 2 , pp. 1-19 , doi: 10.3390/v11020095.

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Abstract

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 conducted a viral metagenomic analysis of water samples collected during the austral summer of 2016 from the South Scotia Ridge (SSR), near the Antarctic Peninsula. The taxonomic composition and diversity of the viral communities were investigated, and a functional assessment of the sequences was performed. Phylotypic analysis showed that most viruses belonged to the order Caudovirales, especially the family Podoviridae (41.92–48.7%), which is similar to the situation in the Pacific Ocean. Functional analysis revealed a relatively high frequency of phage-associated and metabolism genes. Phylogenetic analyses of phage TerL and Capsid_NCLDV (nucleocytoplasmic large DNA viruses) marker genes indicated that many sequences associated with Caudovirales and NCLDV were novel and distinct from known phage genomes. High Phaeocystis globosa virus virophage (Pgvv) signatures were found and complete and partial Pgvv-like were obtained, which influence host–virus interactions. Our study expands existing knowledge of viral communities and their diversities from the Antarctic region and provides basic data for further exploring polar microbiomes.

Item Type: Article
Authors/Creators:Yang, Q and Gao, C and Jiang, Y and Wang, M and Zhou, X and Shao, H and Gong, Z and McMinn, A
Keywords: Antarctic, South Scotia Ridge, metagenomics, virus, viral community, diversity, Pgvv-like
Journal or Publication Title: Viruses
Publisher: MDPIAG
ISSN: 1999-4915
DOI / ID Number: 10.3390/v11020095
Copyright Information:

© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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