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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 71, Issue 3

gen. nov., sp. nov., a novel bacterium isolated from the caecum of an obese mouse Free

Abstract

A bacterial strain, designated WCA-9-b2, was isolated from the caecal content of an 18-week-old obese C57BL/6NTac male mouse. According to phenotypic analyses, the isolate was rod-shaped, strictly anaerobic, spore-forming, non-motile and Gram-stain-positive, under the conditions tested. Colonies were irregular and non-pigmented. Analysis of the 16S rRNA gene sequence indicated that the isolate belonged to the order with ATCC 27755 (94.9 % sequence identity), ATCC 29149 (94.8%) and ATCC 35704 (94.3%) being the closest relatives. Whole genome sequencing showed an average nucleotide identity <74.23 %, average amino acid identity <64.52–74.67 % and percentage of conserved proteins values <50 % against the nine closest relatives (, , , , , , , and ). The genome-based G+C content of genomic DNA was 44.4 mol%. The major cellular fatty acids were C (24.5%), C 9 (19.8 %), C DMA (11.7%), C (8.4%) and C (6.6%). Respiratory quinones were not detected. The predominant metabolic end products of glucose fermentation were acetate and succinate. Production of CO and H were detected. Based on these data, we propose that strain WCA-9-b2 represents a novel species within a novel genus, for which the name gen. nov., sp. nov. is proposed. The type strain is WCA-9-b2 (=DSM 106039=CECT 30156).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): acetate , diet-induced obesity , Firmicutes , Lachnospiraceae , mouse faeces , spore-forming and succinate
Funding
This study was supported by the:
  • Det Frie Forskningsråd (Award DFF-6111-00316)
    • Principle Award Recipient: DennisSandris Nielsen
© 2021 The Authors
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2021-01-29
2024-04-20
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Sporofaciens musculi gen. nov., sp. nov., a novel bacterium isolated from the caecum of an obese mouse
Int J Syst Evol Microbiol 71, 004673 (2021); https://doi.org/10.1099/ijsem.0.004673
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