Aquibacter zeaxanthinifaciens gen. nov., sp. nov., a zeaxanthin-producing bacterium of the family Flavobacteriaceae isolated from surface seawater, and emended descriptions of the genera Aestuariibaculum and Gaetbulibacter.
A Gram-stain-negative, strictly aerobic, rod-shaped, non-flagellated, non-spore-forming and gliding marine bacterium, designated strain CC-AMZ-304(T), was isolated from coastal surface seawater near Taichung harbour, Taiwan. Strain CC-AMZ-304(T) predominantly synthesized zeaxanthin and thus formed yellow colonies on marine agar. The novel strain showed an unstable phylogenetic position, although sharing high pairwise 16S rRNA gene sequence similarities of 95.9-94.9, 95.7 and 95.1-93.9 % with Gaetbulibacter species (n = 4), Aestuariibaculum suncheonense SC17(T) and Bizionia species (n = 7), respectively. The polar lipid profile of strain CC-AMZ-304(T) consisted of phosphatidylethanolamine, five unidentified lipids, one unidentified phospholipid, two unidentified aminolipids and one unidentified glycolipid. The major (>5 % of the total) fatty acids were iso-C15 : 0, iso-C15 : 1 G, iso-C17 : 0 3-OH, iso-C15 : 0 3-OH and C15 : 1ω5c. The DNA G+C content was 36.0 mol%. Menaquinone-6 (MK-6) was the sole respiratory quinone and the major polyamine was triamine sym-homospermidine. Phylogenetic distinctiveness, unique polar lipid composition, presence of significant amounts of branched hydroxyl fatty acids (iso-C17 : 0 3-OH and iso-C15 : 0 3-OH) and a low amount of anteiso-C15 : 0, and several additional distinguishing biochemical features clearly discriminated strain CC-AMZ-304(T) from the type species of the genera Aestuariibaculum and Gaetbulibacter. Thus, based on data from the present polyphasic study, strain CC-AMZ-304(T) is considered to represent a novel species of a new genus within the family Flavobacteriaceae, for which the name Aquibacter zeaxanthinifaciens gen. nov., sp. nov. is proposed; the type strain of Aquibacter zeaxanthinifaciens is CC-AMZ-304(T) ( = JCM 18557(T) = BCRC 80463(T)). Emended descriptions of the genera Aestuariibaculum and Gaetbulibacter are also proposed.
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Asif
A
Hameed
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Mariyam
M
Shahina
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Shih-Yao
SY
Lin
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Wei-An
WA
Lai
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Yi-Han
YH
Hsu
Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
You-Cheng
YC
Liu
Biotechnology Center, National Chung Hsing University, Taichung 402, Taiwan.|Department of Soil & Environmental Sciences, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 402, Taiwan.
Chiu-Chung
CC
Young
D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry; D041965:Flavobacteriaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010714:Phosphatidylethanolamines / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D013095:Spermidine / Q000031:analogs & derivatives / Q000737:chemistry; D013624:Taiwan; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000737:chemistry; D024341:Xanthophylls / Q000096:biosynthesis*; D065146:Zeaxanthins
D004269:DNA, Bacterial; D005227:Fatty Acids; D010714:Phosphatidylethanolamines; D010743:Phospholipids; D012336:RNA, Ribosomal, 16S; D024341:Xanthophylls; D065146:Zeaxanthins; C007961:sym-homospermidine; D024482:Vitamin K 2; C483858:phosphatidylethanolamine; C042455:menaquinone 6; D013095:Spermidine