Bacteroides humanifaecis sp. nov., isolated from faeces of healthy Korean

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Title
Bacteroides humanifaecis sp. nov., isolated from faeces of healthy Korean
Author(s)
Han Sol Kim; Ji Sun Kim; Min Kuk Suh; Mi Kyung EomJu Huck LeeSeung Hwan ParkSe Won Kang; D H Lee; H Yoon; J H Lee; Jung-Sook Lee
Bibliographic Citation
Archives of Microbiology, vol. 204, no. 7, pp. 357-357
Publication Year
2022
Abstract
Two obligately anaerobic, Gram-stain-negative, non-motile, non-spore-forming and short rod shaped bacteria, designated KGMB07931T and KGMB10229, were isolated from faeces of two Korean persons. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strains KGMB07931T and KGMB10229 were very similar to each other (99.9%) and grouped within the genus Bacteroides, displaying the highest similarity with Bacteroides uniformis ATCC 8492T (97.5%), Bacteroides rodentium JCM 16496T (96.6%), and Bacteroides fluxus YIT 12057T (94.5%). Both strains grew optimally at 37 °C and pH 7.5 in the presence of 0.5% (w/v) NaCl. The complete genome of KGMB07931T comprises 3,335 protein-coding genes with a total of 4,240,638 bp and an average G + C content of 46.3 mol%. The major fatty acids were C18:1 cis9, anteiso-C15:0, iso-C15:0, and Summed Feature 11 (iso-C17:0 3OH and/or C18:2 DMA); the predominant respiratory quinones were MK-9 and MK-10; the major fermentation end products were acetate and isobutyrate. The genome of strain KGMB07931T encoded the starch utilization system (Sus) operon, susABCDEFG, suggesting that this strain uses many complex polysaccharides that cannot be digested by humans. Based on polyphasic taxonomic data, strains KGMB07931T and KGMB10229 represent a novel species within the genus Bacteroides, for which the name Bacteroides humanifaecis sp. nov. is proposed. The type strain is KGMB07931T (= KCTC 25160T = NBRC 115005T).
Keyword
Bacteroides humanifaecisHuman faecesGut microbiotaTaxonomy
ISSN
0302-8933
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s00203-022-02967-x
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Biological Resource Center > 1. Journal Articles
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