Complete genome sequence of Shewanella benthica DB21MT-2, an obligate piezophilic bacterium isolated from the deepest Mariana Trench sediment
Résumé
Shewanella benthica DB21MT-2 is an obligate piezophilic bacterium isolated from the sediment of the Mariana Trench at depth of 10,898 m. Here we report the complete genome sequence of S. benthica DB21MT-2, which consists of a single circular chromosome with the size of 4,353,505 bp and G + C content of 45.86%. Comparative genomic analysis reveals the strain possesses multiple pathways for energy generation as has been reported in other deep-sea bacteria. In addition, several genes predicted to be involved in flagellar synthesis or component of toxin-antitoxin system are specifically found in obligate piezophilic strains from hadal trench. The result is expected to provide novel information for a better understanding on bacterial obligate piezophilic life-style and on bacterial adaptation to hadal trench environment.