1887

Abstract

A Gram-stain-negative, aerobic, flagellated and rod-shaped bacterium, designated strain SM2107, was isolated from a deep-sea sediment sample collected from the Southwest Indian Ocean. Strain SM2107 grew at 4–40 °C and with 0–10.0 % (w/v) NaCl. It reduced nitrate to nitrite and hydrolysed casein, gelatin, chitin and DNA. The phylogenetic trees based on the 16S rRNA genes and single-copy orthologous clusters showed that strain SM2107, together with , and , formed a separate clade, having the highest similarity to the type strain of (98.3%). The major polar lipids were phosphatidylethanolamine and phosphatidylglycerol and the major cellular fatty acids were summed feature 8 (C 7 and/or C 6), C, C 8 and summed feature 3 (C 7 and/or C 6). The only respiratory quinone was Q-8. The genomic DNA G+C content of strain SM2107 was 48.8 %. The digital DNA–DNA hybridization values between strain SM2107 and type strains of , and were 41.16, 37.70 and 31.80 %, while the average amino acid identity values between them were 87.59, 86.76 and 83.64 %, respectively. Based on the polyphasic evidence presented in this study, strain SM2107 was considered to represent a novel species within the genus , for which the name was proposed. The type strain is SM2107 (=MCCC M24986=KCTC 82921). Moreover, the transfer of and to the genus as comb. nov. (type strain TS-T4=CGMCC 1.12461=JCM 19264) and comb. nov. (type strain BA131=LMG 23581=CIP 109200) is also proposed.

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2022-07-19
2024-04-28
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