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© Research
Publication : Environmental microbiology

The first head-tailed virus, MFTV1, produced by a hyperthermophilic methanogenic deep-sea archaea

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Environmental microbiology - 06 Oct 2020

Thiroux S, Dupont S, Nesbø CL, Bienvenu N, Krupovic M, L'Haridon S, Marie D, Forterre P, Godfroy A, Geslin C

Link to Pubmed [PMID] – 33022088

Link to DOI [DOI] – 10.1111/1462-2920.15271

Environ Microbiol 2020 Oct; ():

Deep-sea hydrothermal vents are inhabited by complex communities of microbes and their viruses. Despite the importance of viruses in controlling the diversity, adaptation and evolution of their microbial hosts, to date, only eight bacterial and two archaeal viruses isolated from abyssal ecosystems have been described. Thus, our efforts focused on gaining new insights into viruses associated with deep-sea autotrophic archaea. Here, we provide the first evidence of an infection of a hyperthermophilic methanogenic archaea by a head-tailed virus, Methanocaldococcus fervens tailed virus 1 (MFTV1). MFTV1 has an isometric head of 50 nm in diameter and a 150 nm-long non-contractile tail. Virions are released continuously without causing a sudden drop in host growth. MFTV1 infects Methanocaldococcus species and is the first hyperthermophilic head-tailed virus described thus far. The viral genome is a double-stranded linear DNA of 31 kb. Interestingly, our results suggest potential strategies adopted by the plasmid pMEFER01, carried by M. fervens, to spread horizontally in hyperthermophilic methanogens. The data presented here opens a new window of understanding on how the abyssal mobilome interacts with hyperthermophilic marine archaea. This article is protected by copyright. All rights reserved.

https://pubmed.ncbi.nlm.nih.gov/33022088