Parerythrobacter aurantius sp. nov., a Member of the Family Erythrobacteraceae Isolated from a Coastal Breakwater...

A novel bacterial isolate designated as strain 1C24^T was isolated from a coastal breakwater stone. Its cells were Gram-stain-negative, aerobic, non-motile and rod-shaped. The major cellular fatty acids were summed feature 8 (C_18:1 ω6c and/or C_18:1 ω7c), iso-C_18:0 and C_18:1 ω7c 11-methyl; the main polar lipids included diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and sphingoglycolipid; the respiratory quinone was Q-10. The 16S rRNA gene-based analysis demonstrated that strain 1C24^T belonged to the family Erythrobacteraceae. The phylogenomic inference revealed that strain 1C24^T belonged to the genus Parerythrobacter and formed a separate branch independent from its relatives. The digital DNA-DNA hybridization, average nucleotide identity and amino acid identity values between strain 1C24^T and its relatives of the genus Parerythrobacter further indicated that strain 1C24^T should represent a putative novel species of this genus. The genomic size and DNA G + C content of strain 1C24^T were 2.88 Mbp and 64.85%. The genome analysis demonstrated that strain 1C24^T contained a complete photosynthesis gene cluster and a carotenoid biosynthesis gene cluster, and the latter was confirmed by carotenoid detection. Based on genotypic and phenotypic characteristics, strain 1C24^T is concluded to represent a novel species of the genus Parerythrobacter within the family Erythrobacteraceae, for which the name Parerythrobacter aurantius sp. nov. is proposed. The type strain is 1C24^T (= GDMCC 1.2450^T = KCTC 82667^T).