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Methylophaga aminisulfidivorans sp. nov., a restricted facultatively methylotrophic marine bacterium

¹ Department of Biomaterials Engineering, Chosun University, Gwangju 501-759, South Korea
² Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia
³ Department of Environmental Engineering, Chosun University, Gwangju 501-759, South Korea

Correspondence
Si Wouk Kim
swkim{at}chosun.ac.kr

A novel restricted facultatively methylotrophic marine strain, MP^T, possessing the ribulose monophosphate pathway of C₁-carbon compound assimilation was isolated from a seawater sample obtained from Mokpo, South Korea. The novel isolate is aerobic, Gram-negative, asporogenous and a non-motile short rod. It grows well on methanol, methylated amines, dimethylsulfide and DMSO. Optimal growth occurs with 3 % NaCl at 30 °C and pH 7.0. Fructose is utilized as a multicarbon source. Growth factors are not required and vitamin B₁₂ does not stimulate growth. The cellular fatty acid profile of the novel strain consists primarily of straight-chain saturated C_{16 : 0} and unsaturated C_{16 : 1} acids. The major ubiquinone is Q-8. The dominant phospholipids are phosphatidylethanolamine and phosphatidylglycerol. The DNA G+C content is 44.9 mol% (T_m). Based on 16S rRNA gene sequence analysis and DNA–DNA relatedness (25–41 %) with the type strains of marine methylotrophs belonging to the genus Methylophaga, it is suggested that isolate MP^T represents a novel species, Methylophaga aminisulfidivorans sp. nov. (type strain MP^T=KCTC 12909^T=VKM B-2441^T=JCM 14647^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain MP^T is DQ463161.

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