Abstract
A novel thermophilic bacterium, designated SCSIO 07484T, was isolated from marine sediment sampled in the South China Sea. Growth occurred at 30-60 °C, pH 6.0-8.0 and in the presence of 0-3 % (w/v) NaCl. Cells of strain SCSIO 07484T were rod-shaped and flagellum-forming. No soluble pigment was observed. The phylogenetic analysis of the 16S rRNA gene sequences indicated that SCSIO 07484T belonged to the family Paenibacillaceae and clustered with members of the genus Brevibacillus in the phylogenetic trees with less than 96.2 % similarities. The cell wall contained meso-diaminopimelic acid. Whole-cell hydrolysates contained arabinose, glucose and ribose. The predominant menaquinone was MK-7. Major fatty acids were iso-C16 : 0, iso-C15 : 0, C16 : 0 and iso-C14 : 0. Diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and phosphatidylmonomethylethanolamine were its diagnostic polar lipids. The whole genome size of strain SCSIO 07484T was 4 079 826 bp with a DNA G+C content of 56.2 mol%, including one circular chromosome of 3 978392 bp and one plasmid of 101434 bp. Based on the polyphasic analysis of strain SCSIO 07484T, it is considered to represent a novel species of the genus Brevibacillus, for which the name Brevibacillus marinus sp. nov. is proposed with the type strain SCSIO 07484T (=DSM 106769T=CGMCC 1.15814T).
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