Reinekea thalattae sp. nov., a New Species of the Genus Reinekea Isolated from Surface Seawater in Sehwa Beach
2020
Kim, Inhyup | Chhetri, Geeta | Kim, Jiyoun | Kang, Minchung | Seo, Taegun
A Gram-stain-negative, non-pigmented, curved rod-shaped, single polarly flagellated, facultatively anaerobic bacterium, designated as SSH23ᵀ, was isolated from surface seawater sample collected at the Sehwa Beach in South Korea. The novel isolate required NaCl for growth and grew optimally between 2 and 3% NaCl. Strain SSH23ᵀ showed high 16S rRNA gene sequence similarities with Reinekea marinisedimentorum DSM 15388ᵀ (96.4%), Reinekea marina KACC 17315ᵀ (96.2%), Reinekea blandensis KACC 17315ᵀ (95.9%) and Reinekea aestuarii KCTC 22813ᵀ (95.6%). The major polar lipids of strain SSH23ᵀ were phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylglycerol. The major cellular fatty acids of strain SSH23ᵀ were C₁₆:₀, summed feature 3 (C₁₆:₁ ω7c and/or C₁₆:₁ ω6c), and summed feature 8 (C₁₈:₁ ω7c and/or C₁₈:₁ ω6c). The predominant respiratory quinone was found to be ubiquinone-8. The average nucleotide identity values of strain SSH23ᵀ with R. marinisedimentorum DSM 15388ᵀ and R. blandensis MED297ᵀ were determined to be 72.2% and 69.8%, respectively. The G+C content of the genomic DNA was 45.5 mol%. Based on genotypic, phenotypic, chemotaxonomic, and phylogenetic analyses, strain SSH23ᵀ was considered to represent a novel member of the genus Reinekea, for which the name Reinekea thalattae sp. nov. is proposed. The type strain of Reinekea thalattae is SSH23ᵀ (= KACC 21168ᵀ = NBRC 113795ᵀ).
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