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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 74, Issue 10

sp. nov. and sp. nov., isolated from water kefir Open Access

Abstract

Four strains, representing two novel species, were isolated from water kefir, a fermented beverage. 16S rRNA gene analysis suggested that the novel species share high identities (98.82–98.89%) with LMG 28769. Complete genomes were assembled with a short- and long-read hybrid sequencing approach. In agreement with the 16S rRNA gene analysis, phylogenetics with 117 marker genes places the novel species closest to LMG 28769 as well. The isolates have average nucleotide identity (ANI) scores ranging from 81.46 to 84.84% and digital DNA–DNA hybridization (dDDH) scores from 23.9 to 38.5% with the closest related species, as well as ANI scores between the proposed new species of 80.50%, indicating that the isolates represent two novel species. Matrix-assisted laser desorption/ionization-time of flight chemotaxonomic analysis supported the gene-based taxonomic placement. We propose the names sp. nov. and sp. nov. for these novel species within the genus. The proposed type strain WK012_4_13 (= LMG 33104 = DSM 116073; GenBank accession number GCF_041080835.1) has a genome size of 2.43 Mbp, with a G+C content of 56.00 mol%. The proposed type strain for WK041_4_12 (= LMG 33105 = DSM 116074; GenBank accession number GCF_041080795.1) has a genome size of 2.36 Mbp and a G+C content of 53.94 mol%. cells are Gram-positive staining, non-motile, non-spore-forming, fructose-6-phosphate phosphoketolase (F6PPK)-positive, catalase- and oxidase-negative and bacillary club shaped. cells are Gram-positive staining, non-motile, non-spore-forming, F6PPK-positive, catalase- and oxidase-negative and square rod shaped.

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  • Accepted:
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Keyword(s): Bifidobacterium , metagenomics , polyphasic taxonomy and water kefir
Funding
This study was supported by the:
  • European Social Fund (Award BOCYL-D-07072020-6)
    • Principal Award Recipient: CoralBarcenilla
  • Junta de Castilla y León
    • Principal Award Recipient: CoralBarcenilla
  • Science Foundation Ireland (Award SFI/12/RC/2273_P2)
    • Principal Award Recipient: PaulD. Cotter
  • Horizon 2020 (Award 818368)
    • Principal Award Recipient: PaulD. Cotter
© 2024 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2024-10-24
2025-11-11

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Bifidobacterium fermentum sp. nov. and Bifidobacterium aquikefiricola sp. nov., isolated from water kefir
Int J Syst Evol Microbiol 74, 006549 (2024); https://doi.org/10.1099/ijsem.0.006549
/content/journal/ijsem/10.1099/ijsem.0.006549
/content/journal/ijsem/10.1099/ijsem.0.006549
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