Methylobacterium currus sp. nov., isolated from a car air conditioning system
Park, Chulwoo and Lee, Yun Suk and Park, So-yoon and Park, Woojun,, 68, 3621-3626 (2018),
doi = https://doi.org/10.1099/ijsem.0.003045,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= A novel bacterial strain, designated PR1016AT, was isolated from a car air conditioning system. This rod-shaped strain showed catalase and oxidase activities, was aerobic and methylotrophic, and had a reddish pink colour. The genomic DNA G+C content of strain PR1016AT was 70.2 mol%, as determined by genome sequencing. Phylogenetic analysis based on 16S rRNA gene sequence similarity showed that strain PR1016AT was most closely related to Methylobacterium aquaticum GR16T (98.86 %), M. variabile GR3T (98.43 %), M. platani PMB 02T (98.36 %) and M. tarhaniae N4211T (98.14 %). The average nucleotide identity and digital DNA–DNA hybridization values between strain PR1016AT and M. aquaticum GR16T, M. platani PMB02T and M. variabile GR3T were 88.61, 88.14 and 87.88 %, and 36.4, 35.8 and 34.7 %, respectively. Numerous insertion sequences are present in the genome of strain PR1016AT, which has a larger genome than the four Methylobacterium species described above. Cells grew at 18–42 °C (optimum, 30 °C), at pH 4.0–9.0 (optimum, pH 7.0) and in the presence of 0–1.0 % (w/v) NaCl (optimum, 0 %). The major respiratory quinone was Q10. Fatty acid methyl ester analysis revealed that summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c) was the predominant cellular fatty acid in strain PR1016AT. Two-dimensional TLC indicated that the major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and phosphatidylcholine. The genotypic and phenotypic characteristics indicate that strain PR1016AT represents a novel species of the genus Methylobacterium , for which the name Methylobacterium currus sp. nov. is proposed. The type strain is PR1016AT (=KACC 19662T=JCM 32670T).,
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