Abstract
A novel Gram-negative, facultatively anaerobic and motile bacterial strain, designated KMM 6351(T), was isolated from the sea urchin Strongylocentrotus intermedius and examined using a polyphasic taxonomic approach. A phylogenetic analysis based on 16S rRNA gene sequencing revealed that the strain formed a distinct phyletic line in the class Gammaproteobacteria and was most closely related to the genera Aliivibrio, Photobacterium and Vibrio. Strain KMM 6351(T) grows at 4-40°C and with 0.5-12% NaCl and decomposes aesculin, agar, gelatin, starch, chitin and DNA. The DNA G+C content of the strain was determined to be 46.1mol%. The prevalent fatty acids were found to be C(16:0), C(18:1) ω7c, C(12:0) 3-OH and summed feature 3 (comprising C(16:1) ω7c and/or iso-C(15:0) 2-OH fatty acids). The major polar lipids were determined to be diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and an unidentified aminolipid. The predominant ubiquinone was found to be Q-8. The results of the phenotypic, chemotaxonomic and genotypic analyses clearly indicated that the novel strain should be assigned to a new genus and species within the class γ-Proteobacteria for which the name Echinimonas agarilytica gen. nov., sp. nov. is proposed. The type strain is KMM 6351(T) (=KCTC 22996(T)=LMG 25420(T)).
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