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1 Sunchon National University;
2 Gwangju Health college;
3 Chung-Ang University
4 E-mail: jjung{at}sunchon.ac.kr
A rod-shaped, translucent yellow-pigmented, aerobic, Gram-negative bacterium, designated strain JO-1T, was isolated from the bivalve Crassostrea gigas collected from sea of Wando-island, Korea. It grew at 15–37 °C (optimum, 30 °C) only in the presence of sea salts. Strain JO-1T was capable of hydrolysis of casein, Tween80 and starch. Major fatty acids were iso-C15:0 (23.8 %), summed feature 3 (comprising C16:1
7c and/or iso-C15:0 2-OH, 14.5 %) and iso-C15:1 G (14.1 %). Analysis of the 16S rRNA gene sequence indicated that strain JO-1T was a member of the genus Tenacibaculum, with sequence similarity level of 94.6–97.8 % to type strains of recognized members of the genus. The G+C content of the genomic DNA was 31.4 mol%. DNA-DNA relatedness levels between strain JO-1T and five relatives, Tenacibaculum litoreum KCCM 42115T, Tenacibaculum lutimaris KCTC 12302T, Tenacibaculum aestuarii KCTC 12569T, Tenacibaculum mesophilum DSM 13764T and Tenacibaculum adriaticum JCM 14633T were less than 28 %. Phylogenetic analyses and differences in physiological and biochemical characteristics suggest that strain JO-1T (= KCTC 22329T = JCM 15428T) should be classified as the type strain of a novel species within the genus Tenacibaculum, for which the name Tenacibaculum crassostreae sp. nov. is proposed.
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