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Abstract
A Gram-stain-negative, rod-shaped, non-gliding, non-flagellated, yellow, facultatively aerobic bacterial strain, designated as W260T, was isolated from marine sediment of Xiaoshi Island, Weihai, PR China. The cells of W260T were 0.3–0.5 µm wide and 1.5–2.0 µm long. Strain W260T grows optimally at a temperature of 33 °C (range, 15–37 °C), pH 8 (range, pH 6.5–9.5) and witha NaCl concentration of 3.0 % (w/v; range, 1–8 %). It has the highest sequence similarity to Thiohalobacter thiocyanaticus DSM 21152T (91.7 %), followed by Wenzhouxiangella marina MCCC 1K00261T (91.4 %) and Thiohalospira alkaliphila DSM 17116T (90.7 %). The similarity between strain W260T and the species Thiohalophilus thiocyanatoxydans DSM 16326T was 89.4 %. Genome sequencing revealed a genome size of 3 430 000 bp and a DNA G+C content of 64.5 mol%. The average nucleotide identity and digital DNA–DNA hybridization values between strain W260T and W. marina MCCC 1K00261T were 69.6 and 16.1–20.6 %, respectively. The predominant quinone was ubiquitin-8, and the major fatty acids were iso-C14 : 0 and iso-C16 : 0. The polar lipids consisted of phosphatidylethanolamine, phospholipid, phosphatidylglycerol, diphosphatidylglycerol and four unidentified lipids. Based on phenotypic, phylogenetic and chemotaxonomic information, it was determined that strain W260T represents a novel genus and species and it was given the name Marinihelvus fidelis sp. nov. The type strain is W260T (=MCCC 1H00471T=KCTC 92639T).
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Funding
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National Natural Science Foundation of China
(Award 32070002)
- Principle Award Recipient: Zong-JunDu
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Science & Technology Fundamental Resources Investigation Program
(Award 2019FY100700)
- Principle Award Recipient: Zong-JunDu