Genome analysis of Rubritalea profundi SAORIC-165T, the first deep-sea verrucomicrobial isolate, from the northwestern Pacific Ocean

These findings suggest that R. profundi represents a genetically unique and ecologically relevant verrucomicrobial group well adapted to the deep-sea environment

Jaeho Song; Ilnam Kang; Yochan Joung; Susumu Yoshizawa; Ryo Kaneko; Kenshiro Oshima; Masahira Hattori; Koji Hamasaki; Kazuhiro Kogure; Soochan Kim; Kangseok Lee; Jang-Cheon Cho

2019

Scholarcy highlights

  • Culture-independent studies have shown the presence of Verrucomicrobia in the deep sea, verrucomicrobial strains from deep-sea environments have been rarely cultured and characterized
  • The draft genome consisted of four contigs with an entire size of 4,167,407 bp and G+C content of 47.5%
  • The comparative genomic analyses with two surface-derived Rubritalea genomes showed that the SAORIC-165T genome was enriched in genes involved in transposition of mobile elements, signal transduction, and carbohydrate metabolism, some of which might be related to bacterial enhancement of ecological fitness in the deep-sea environment
  • Amplicon sequencing of 16S rRNA genes from the water column revealed that R. profundi-related phylotypes were relatively abundant at 2,000 m and preferred a particle-associated life style in the deep sea
  • These findings suggest that R. profundi represents a genetically unique and ecologically relevant verrucomicrobial group well adapted to the deep-sea environment
  • Comparative metagenomic analysis of a microbial community residing at a depth of 4,000 meters at station ALOHA in the North Pacific subtropical gyre

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