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Zeaxanthinibacter enoshimensis gen. nov., sp. nov., a novel zeaxanthin-producing marine bacterium of the family Flavobacteriaceae, isolated from seawater off Enoshima Island, Japan

Life Science Research Center, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa 252-8510, Japan

Correspondence
Kenji Ueda
ueda{at}brs.nihon-u.ac.jp

A novel marine, Gram-negative, yellow-pigmented, rod-shaped, strictly aerobic, gliding and oxidase- and catalase-positive bacterium (strain TD-ZE3^T) was isolated from a seawater sample collected off the Pacific coastline of Japan near Enoshima Island (Fujisawa, Kanagawa). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain TD-ZE3^T belonged to a distinct lineage in the family Flavobacteriaceae, with 90.5 % sequence similarity with the nearest species Robiginitalea biformata. Strain TD-ZE3^T could be distinguished from other members of the family Flavobacteriaceae by a number of chemotaxonomic and phenotypic characteristics. The DNA G+C content was 46.5 mol%. The major fatty acids were iso-C_{15 : 0}, iso-C_{17 : 0} 3-OH and iso-C_{17 : 1}9c and menaquinone-6 was the only respiratory quinone. Zeaxanthin was the major carotenoid pigment produced; flexirubin-type pigments were not produced. Strain TD-ZE3^T degraded gelatin, starch and Tween 80. Based on its unique phenotypic, genotypic and phylogenetic features, strain TD-ZE3^T represents a novel taxon, for which the name Zeaxanthinibacter enoshimensis gen. nov., sp. nov. is proposed. The type strain is TD-ZE3^T (=NBRC 101990^T=CCUG 53613^T).

Scanning electron micrographs of cells of strain TD-ZE3^T are available as supplementary material in IJSEM Online.

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