Diaminobutyricibacter tongyongensis gen. nov., sp. nov. and Homoserinibacter gongjuensis gen. nov., sp. nov. Belong to the Family Microbacteriaceae

Soo-Jin Kim; Jae-Hyung Ahn; Hang-Yeon Weon; Moriyuki Hamada; Ken-ichiro Suzuki; Soon-Wo Kwon

doi:10.1007/s12275-014-3278-y

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Diaminobutyricibacter tongyongensis gen. nov., sp. nov. and Homoserinibacter gongjuensis gen. nov., sp. nov. Belong to the Family Microbacteriaceae: Soo-Jin Kim ¹, Jae-Hyung Ahn ¹, Hang-Yeon Weon ¹, Moriyuki Hamada ², Ken-ichiro Suzuki ², Soon-Wo Kwon ¹; Journal of Microbiology 2014;52(6):527-533.
DOI: https://doi.org/10.1007/s12275-014-3278-y
Published online: February 17, 2014

¹Agricultural Microbiology Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea, ²Biological Resource Center (NBRC), National Institute of Technology and Evaluation, 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan

Corresponding author: Soon-Wo Kwon , Tel: +82-31-299-1860,

Received: 13 May 2013 • Revised: 11 September 2013 • Accepted: 11 September 2013

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Abstract

Two bacterial strains, KIS66-7T and 5GH26-15T, were isolated from soil samples collected in the South Korean cities of Tongyong and Gongju, respectively. Both strains were aerobic, Gram-stain-positive, mesophilic, flagellated, and rodshaped. A phylogenetic analysis revealed that both strains belonged to the family Microbacteriaceae of the phylum Actinobacteria. The 16S rRNA gene sequence of strain KIS66-7T had the highest similarities with those of Labedella gwakjiensis KSW2-17T (97.3%), Cryobacterium psychrophilum DSM 4854T (97.2%), Leifsonia lichenia 2SbT (97.2%), Leifsonia naganoensis JCM 10592T (97.0%), and Cryobacterium mesophilum MSL-15T (97.0%). Strain 5GH26-15T showed the highest sequence similarities with Leifsonia psychrotolerans LI1T (97.4%) and Schumannella luteola KHIAT (97.1%). The 16S rRNA gene sequence from KIS66-7T exhibited 96.4% similarity with that from 5GH26-15T. Strain KIS66-7T contained a B2γ type peptidoglycan structure with D-DAB as the diamino acid; MK-13, MK-12, and MK-14 as the respiratory quinones; ai-C15:0, ai-C17:0, and i-C16:0 as the major cellular fatty acids; and diphosphatidylglycerol, phatidylglycerol, and glycolipids as the predominant polar lipids. Strain 5GH26-15T had a B2β type peptidoglycan structure with D-DAB as the diamino acid; MK-14 and MK-13 as the respiratory quinones; ai-C15:0, i-C16:0, and ai-C17:0 as the major cellular fatty acids; and diphosphatidylglycerol, phatidylglycerol, and glycolipids as the predominant polar lipids. Both strains had low DNA-DNA hybridization values (<40%) with closely related taxa. Based on our polyphasic taxonomic characterization, we propose that strains KIS66-7T and 5GH26-15T represent novel genera and species, for which we propose the names Diaminobutyricibacter tongyongensis gen. nov., sp. nov. (type strain KIS66-7T =KACC 15515T =NBRC 108724T) and Homoserinibacter gongjuensis gen. nov., sp. nov. (type strain 5GH26-15T =KACC 15524T =NBRC 108755T) within the family Microbacteriaceae.

Keywords: Diaminobutyricibacter tongyongensis;Homoserinibacter gongjuensis;Microbacteriaceae;new genus

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Diaminobutyricibacter tongyongensis gen. nov., sp. nov. and Homoserinibacter gongjuensis gen. nov., sp. nov. Belong to the Family Microbacteriaceae

J. Microbiol. 2014;52(6):527-533. Published online February 17, 2014

DOI: https://doi.org/10.1007/s12275-014-3278-y

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