Journal
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
Volume 64, Issue -, Pages 3360-3368Publisher
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.063198-0
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Two myxobacterial strains (designated B00001(T) and B00002(T)) were isolated from forest soil samples collected from Yakushima Island, Kagoshima, Japan. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strains B00001(T) and B00002(T) respectively formed independent branches within the suborders Cystobacterineae and Sorangiineae and were most closely related to Cystobacter armeniaca DSM 14710(T) (90.4% similarity) and Byssovorax cruenta DSM 14553(T) (91.3%). Neither strain showed typical features of myxobacteria such as bacteriolytic action or fruiting body formation, but both had high DNA G + C contents (66.3-68.3 mol%). Swarming motility was observed in strain B00002(T) only. Cells of both strains were vegetative, chemoheterotrophic, mesophilic, strictly aerobic, Gram-negative, motile rods, and both strains exhibited esterase lipase (C8), leucine arylamidase, naphthol-AS-BI-phosphohydrolase and beta-galactosidase activities. Strain B00001(T) contained MK-7 as the predominant respiratory quinone and the major fatty acid was iso-C-15:0. In contrast, strain B00002(T) contained MK-8 as the major cellular quinone and the major fatty acids were C-16:1 omega 5c and iso-C-17:0. Based on the phenotypic and genotypic data presented, strains B00001(T) and B00002(T) represent novel genera and species, for which we propose the names Vulgatibacter incomptus gen. nov., sp. nov. and Labilithrhc luteola gen. nov., sp. nov., respectively. The type strains of Vulgatibacter incomptus and Labilithrix luteola are B00001(T) (=NBRC 109945(T)=DSM 27710(T)) and B00002(T) (=NBRC 109946(T)=DSM 27648(T)), respectively. The new genera are assigned to the new families Vulgatibacteraceae fam. nov. and Labilitrichaceae fam. nov., respectively. In addition, Anaeromyxobacteraceae fam. nov., is proposed to accommodate the genus Anaeromyxobacter, which is related to the genus Vulgatibacter.
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