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Int J Syst Evol Microbiol 57 (2007), 2096-2101; DOI  10.1099/ijs.0.65139-0
© 2007 International Union of Microbiological Societies

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

Hee Gon Kim1, Nina V. Doronina2, Yuri A. Trotsenko2 and Si Wouk Kim3

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, MPT, 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 C16 : 0 and unsaturated C16 : 1 acids. The major ubiquinone is Q-8. The dominant phospholipids are phosphatidylethanolamine and phosphatidylglycerol. The DNA G+C content is 44.9 mol% (Tm). 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 MPT represents a novel species, Methylophaga aminisulfidivorans sp. nov. (type strain MPT=KCTC 12909T=VKM B-2441T=JCM 14647T).

Abbreviations: H4MPT, tetrahydromethanopterin; PMS, phenazine methosulfate; PQQ, pyrroloquinoline quinone

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






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