1887

Abstract

A Gram-stain-negative, oxidase- and catalase-positive, rod-shaped, creamy white coloured bacterial strain, DMG-N-6, was isolated from a water sample of Lake Fertő/Neusiedler See (Hungary). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain forms a distinct linage within the family . Its closest relatives are DJC (96.76% similarity) and K13M18 (96.76%), followed by DRYC-M-16 (96.69 %), JA983 (96.62 %), RCRI19 (96.47 %) and JA192 (96.18 %). The novel bacterial strain favours an alkaline environment (pH 8.0-12.0) and grows optimally at 18–28°C in the presence of 2–4 % (w/v) NaCl. Cells of DMG-N-6 were motile by a single subpolar flagellum. Bacteriochlorophyll was not detected. The predominant respiratory quinone was ubiquinone Q-10. The major cellular fatty acid was C 7. The polar lipid profile comprised phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylserine, phosphatidylcholine, an unidentified phospholipid and five unidentified lipids. The assembled draft genome of strain DMG-N-6 had 52 contigs with a total length of 4 219 778 bp and a G+C content of 64.3 mol%. Overall genome-related indices (ANI <77.8 %, AAI <69.0 %, dDDH <19.6 %) with respect to close relatives were all significantly below the corresponding threshold to demarcate bacterial genus and species. Strain DMG-N-6 (=DSM 108208=NCAIM B.02645) is strongly different from its closest relatives and is suggested as the type strain of a novel species of a new genus in the family , for which the name gen. nov., sp. nov. is proposed.

Funding
This study was supported by the:
  • Nemzeti Kutatási, Fejlesztési és Innovaciós Alap (Award TKP2020-IKA-05)
    • Principle Award Recipient: ErikaTóth
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2022-01-31
2024-11-05
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