Cellvibrio chitinivorans sp. nov., a chitinolytic bacterium isolated from an intertidal mudflat

文献类型： 外文期刊

第一作者： Xin, Yanzhe

作者： Xin, Yanzhe;Qin, Xing;Zhang, Honghai;Dong, Tao;Wang, Xiaolu;Wang, Yaru;Wang, Yuan;Tu, Tao;Huang, Huoqing;Yao, Bin;Luo, Huiying

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关键词： Cellvibrio chitinivorans; chitinolytic bacterium; intertidal mudflat; new taxa

期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.0； 五年影响因子：2.2 ）

ISSN： 1466-5026

年卷期： 2025 年 75 卷 6 期

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收录情况： SCI

摘要： A novel chitinolytic bacterium, designated as NN19T, was isolated from the intertidal mudflat in Leizhou, Guangdong Province, PR China, and subjected to polyphasic taxonomy studies. Strain NN19T is a Gram- negative short rod- shaped bacterium that is motile via a single polar flagellum. Growth occurred at temperatures of 15 degrees C and 37 degrees C (optimal 30 degrees C), pH 6.5-8.0 (optimal pH 7.0) and sodium chloride concentration of 0%-3% (optimal 0.5%-1%). It was identified as a Cellvibrio species based on the results of 16S rRNA gene sequence analysis, and it showed the highest degree of sequence similarity with Cellvibrio fontiphilus MVW-40T (97.87%). The main fatty acids of NN19T were found to be summed feature 3 (C16: 1 w7c/C16: 1 w6c), C16: 0 and C18: 1 w7c. The polar lipid profile included diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and phospholipid. The respiratory quinone was shown to be ubiquinone- 8. Strain NN19T had a genome of 4.46 Mb with a G+C content of 47.82%. The average nucleotide identity and digital DNA-DNA hybridization value between strain NN19T and C. fontiphilus MVW-40T are 75.47% and 20.4%, respectively. Based on phylogenetic analysis and phenotypic data, we concluded that strain NN19T represents a novel species belonging to the genus Cellvibrio, for which the name Cellvibrio chitinivorans sp. nov. is proposed. The type strain is NN19T (=MCCC 1K08847T=KCTC 8393T).

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