1. Bacteroides humanifaecis sp. nov., isolated from faeces of healthy Korean.
- Author
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Kim HS, Kim JS, Suh MK, Eom MK, Lee JH, Park SH, Kang SW, Lee DH, Yoon H, Lee JH, and Lee JS
- Subjects
- Bacterial Typing Techniques, DNA, Bacterial genetics, Feces microbiology, Humans, Phylogeny, RNA, Ribosomal, 16S genetics, Republic of Korea, Sequence Analysis, DNA, Vitamin K 2 chemistry, Bacteroides genetics, Fatty Acids chemistry
- Abstract
Two obligately anaerobic, Gram-stain-negative, non-motile, non-spore-forming and short rod shaped bacteria, designated KGMB07931
T 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 )., (© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)- Published
- 2022
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