gen. nov., sp. nov., a new member of the family isolated from a cave soil.

Int J Syst Evol Microbiol

Jeju Biological Resource Co., Ltd, CTC business Incubator, Jeju 63242, Republic of Korea.

Published: May 2020

AI Article Synopsis

  • A novel strain of bacteria named C5-26 was isolated from soil in a cave in Jeju, Korea, characterized as Gram-stain-positive, aerobic, non-spore-forming cocci.
  • The strain's genetic analysis revealed unique features, including a specific peptidoglycan type and a distinct fatty acid composition, alongside a draft genome size of 5.32 Mbp with a G+C content of 67.1%.
  • Phylogenetic studies indicated that C5-26 belongs to a new genus and species within its family, proposing the name for the novel strain as a result of this comprehensive polyphasic analysis.

Article Abstract

A novel Gram-stain-positive, actinobacterial strain, designated C5-26, was isolated from soil from a natural cave in Jeju, Republic of Korea, and its taxonomic position was investigated using a polyphasic approach. The organism was aerobic, and cells were non-spore-forming, non-motile cocci that occurred singly, in pairs, in triplets, in tetrads, in short chains or in irregular clusters. Colonies of the cells were circular, convex, entire and white. The peptidoglycan type was A4α with an l-Ser-d-Asp interpeptide bridge. The whole-cell sugars comprised glucose, rhamnose, mannose, arabinose, galactose and ribose. The major menaquinone was MK-8(H). The polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and an unidentified phospholipid. The major fatty acids were iso-C and iso-C h. The size of the draft genome was 5.32 Mbp with depth of coverage of 161×. The G+C content of the genomic DNA was 67.1 mol%. Phylogenetic analyses based on 16S rRNA gene sequences showed that the novel isolate belonged to the family and formed a distinct subcluster at the base of the radiation of the genus . Highest sequence similarities of the novel isolate were found to the type strains of (96.2 %), (95.4 %), (95.4 %) and (95.3 %). The whole genome-based phylogeny supported the novelty of the isolate at the genus level in the family . On the basis of data from this polyphasic study, strain C5-26 (=KCTC 39632=DSM 108676) represents a novel species of a new genus in the family , for which the name gen. nov., sp. nov. is proposed.

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http://dx.doi.org/10.1099/ijsem.0.004177DOI Listing

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