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

Volume 75, Issue 4

sp. nov., a 3-hydroxybutyrate-producing bacterium isolated from sediment of the meromictic Lake Pavin No Access

Abstract

An anaerobic, spore-forming, 3-hydroxybutyrate (3-HB)-producing bacterium, strain IPX_CK, was isolated from sediment of a meromictic lake located in Massif Central (France). Cells were rods, forming filamentous chains which were observed moving under the microscope. Strain IPX_CK utilized a wide variety of carbohydrates, but not raffinose, rhamnose and starch. Hydrogen (H), 3-HB, acetate and ethanol were the main fermentative end-products from growth in medium containing glucose. Strain IPX_CK grew optimally at 37 °C and pH 7. Its closest phylogenetic relative was (16S rRNA gene sequence identity 98.7%, DDH 34.6%, ANIb 87.4%). The genomic DNA G+C content was 43.0 mol%. As for , whole-genome sequencing suggested that strain IPX_CK is capable of fixing nitrogen (N). However, strain IPX_CK carried a five--gene-set (), not present in . Genome sequence also showed a high number of encoded chemotaxis receptors (42 genes, the second highest in the family after ). Based on phenotypic, genomic, phylogenetic and chemotaxonomic analyses, it is proposed that a novel species, sp. nov., be created, with strain IPX_CK (DSM 118044, CIP 112511) as the type strain.

  • Received:
  • Accepted:
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Keyword(s): 3-hydroxybutyrate-producing bacterium , anaerobe , freshwater sediment and Kineothrix
© 2025 The Authors
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2025-04-24
2026-03-05

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Kineothrix sedimenti sp. nov., a 3-hydroxybutyrate-producing bacterium isolated from sediment of the meromictic Lake Pavin
Int J Syst Evol Microbiol 75, 006750 (2025); https://doi.org/10.1099/ijsem.0.006750
/content/journal/ijsem/10.1099/ijsem.0.006750
/content/journal/ijsem/10.1099/ijsem.0.006750
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