University Of Tasmania
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Identification and genomic analysis of temperate Halomonas bacteriophage vB_HmeY_H4907 from the surface sediment of the Mariana Trench at a depth of 8,900 m

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journal contribution
posted on 2023-11-12, 21:48 authored by Yue Su, Wenjing Zhang, Yantao Liang, Hongmin Wang, Yundan Liu, Kaiyang Zheng, Ziqi Liu, Hao Yu, Linyi Ren, Hongbing Shao, Yeong Yik Sung, Wen Jye Mok, Li Lian Wong, Yu-Zhong Zhang, Andrew McMinnAndrew McMinn, Min Wang
Viruses play crucial roles in the ecosystem by modulating the host community structure, mediating biogeochemical cycles, and compensating for the metabolism of host cells. Mariana Trench, the world's deepest hadal habitat, harbors a variety of unique microorganisms that have adapted to its extreme conditions of low temperatures, high pressure, and nutrient scarcity. However, our knowledge about isolated hadal phage strains in the hadal trench is still limited. This study reported the discovery of a temperate phage, vB_HmeY_H4907, infecting Halomonas meridiana H4907, isolated from surface sediment from the Mariana Trench at a depth of 8,900 m. To our best knowledge, it is the deepest isolated siphovirus from the ocean. Its 40,452 bp linear dsDNA genome has 57.64% GC content and 55 open reading frames, and it is highly homologous to its host. Phylogenetic analysis and average nucleotide sequence identification reveal that vB_HmeY_H4907 is separated from the isolated phages and represents a new family, Suviridae, with eight predicted proviruses and six uncultured viral genomes. They are widely distributed in the ocean, suggesting a prevalence of this viral family in the deep sea. These findings expand our understanding of the phylogenetic diversity and genomic features of hadal lysogenic phages, provide essential information for further studies of phage-host interactions and evolution, and may reveal new insights into the lysogenic lifestyles of viruses inhabiting the hadal ocean. IMPORTANCE Halomonas phage vB_HmeY_H4907 is the deepest isolated siphovirus from the ocean, and it represents a novel abundant viral family in the ocean. This study provides insights into the genomic, phylogenetic, and ecological characteristics of the new viral family, namely, Suviridae.



  • Article

Publication title

Microbiology Spectrum








D-Y Chao








Ecology and Biodiversity


American Society for Microbiology

Publication status

  • Published online

Place of publication

United States

Event Venue

College of Marine Life Sciences, Institute of Evolution and Marine Biodiversity, Frontiers Science Center for Deep Ocean, Center for Ocean Carbon Neutrality, Ocean University of China , Qingdao, China.

Rights statement

Copyright © 2023 Su et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

UN Sustainable Development Goals

14 Life Below Water