Paracoccus indicus sp. nov., isolated from surface seawater in the Indian Ocean.

Strain IO390502^T, isolated from surface seawater in the Indian Ocean, was characterised using a polyphasic taxonomy approach. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain IO390502^T belongs to the genus Paracoccus and is closely related to Paracoccus seriniphilus DSM 14827^T (97.6%), followed by P. zeaxanthinifaciens JCM 21774^T (97.5%), P. homiensis DSM 17862^T (97.3%), P. marcusii DSM 11574^T (97.2%), P. haeundaensis BC 74171^T (97.0%) and P. carotinifaciens E-396^T (97.0%). Cells are Gram-negative, aerobic, poly-β-hydroxybutyrate-accumulating, motile, rod-shaped, and forms creamy-white colonies. Optimal growth occurred at 25–30 °C, pH 5–8, and in the presence of 3–8% NaCl. The genome of strain IO390502^T has a G+C content of 64.9 mol% and a 3.5 Mb chromosome. The in silico DNA–DNA hybridisation and average nucleotide identity values between strain IO390502^T and the three closely related taxa, P. seriniphilus DSM 14827^T, P. zeaxanthinifaciens JCM 21774^T and P. homiensis DSM 17862^T, are 19.6%, 21.9% and 20.6%, and 76.0%, 79.9% and 77.8%, respectively. Phosphatidylglycerol is the major lipid present, ubiquinone-10 (Q-10) is the sole isoprenoid quinone, and the major cellular fatty acid is C_18:1ω7c. Based on data from phenotypic tests and genotypic differences between strain IO390502^T and its close phylogenetic relatives, strain IO390502^T represents a new species belonging to the genus Paracoccus, for which the name Paracoccus indicus sp. nov. is proposed. The type strain is IO390502^T (= JCM 32637^T = CCTCC AB 2018071^T). [ABSTRACT FROM AUTHOR]