Preprint Article Version 1 This version is not peer-reviewed

Metagenomic Characterization of the Viral Community of the South Scotia Ridge

Version 1 : Received: 24 October 2018 / Approved: 29 October 2018 / Online: 29 October 2018 (09:43:50 CET)

A peer-reviewed article of this Preprint also exists.

Yang, Q.; Gao, C.; Jiang, Y.; Wang, M.; Zhou, X.; Shao, H.; Gong, Z.; McMinn, A. Metagenomic Characterization of the Viral Community of the South Scotia Ridge. Viruses 2019, 11, 95. Yang, Q.; Gao, C.; Jiang, Y.; Wang, M.; Zhou, X.; Shao, H.; Gong, Z.; McMinn, A. Metagenomic Characterization of the Viral Community of the South Scotia Ridge. Viruses 2019, 11, 95.

Journal reference: Viruses 2019, 11, 95
DOI: 10.3390/v11020095

Abstract

Viruses are the most abundant biological entities in aquatic ecosystems and harbor an enormous genetic diversity. While their great influence on the marine ecosystems is widely acknowledged, current information about their diversity remains scarce. A viral metagenomic analysis of three water samples was conducted from sites on the South Scotia Ridge (SSR) near the Antarctic Peninsula, during the austral summer 2016. The taxonomic composition and diversity of the viral communities were investigated and a functional assessment of the sequences was determined. Phylotypic analysis showed that most viruses belonging to the order Caudovirales, especially the family Podoviridae (41.92-48.7%), similar to the viromes from 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 in SSR area and complete and partial Pgvv-like were obtained which may have an influence on host-virus interactions. Our study expands the existing knowledge of viral communities and their diversities from the Antarctic region and provides basic data for further exploring polar microbiomes.

Subject Areas

virus; South Scotia Ridge; viral community; diversity; Pgvv-like

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