Genomic analysis of Shewanella eurypsychrophilus YLB-09 reveals backgrounds related to its deep sea environment adaptation.

Shewanella eurypsychrophilus YLB-09 is a psychrophilic and piezotolerant bacterium that was isolated from 2699 m deep sea sediments of the Southwest Indian Ocean. The complete genome sequence of the strain Shewanella eurypsychrophilus YLB-09 was analyzed. The genome of Shewanella eurypsychrophilus YLB-09 contained one single circular chromosome 6,225,487 base pairs with a 43.6 mol% G + C content of 52 ribosomal RNA genes and 5124 protein-coding genes. YLB-09 has the largest number of genes related to energy production and conversion among 22 available complete genomes of Shewanella genus. Meanwhile， a large quantity of genes encoding flagellum/fimbrial-related proteins and two major secondary metabolic gene clusters were found in YLB-09. These data could provide insights into the mechanism of this strain in adapting to deep sea extreme environments.