title: Neoasaia chiangmaiensis gen. nov., sp. nov., a novel osmotolerant acetic acid bacterium in the alpha-Proteobacteria.
abstract: An acetic acid bacterium, designated as isolate AC28(T), was isolated from a flower of red ginger (khing daeng in Thai; Alpinia purpurata) collected in Chiang Mai, Thailand, at pH 3.5 by use of a glucose/ethanol/acetic acid (0.3%, w/v) medium. A phylogenetic tree based on 16S rRNA gene sequences for 1,376 bases showed that isolate AC28(T) constituted a cluster along with the type strain of Kozakia baliensis. However, the isolate formed an independent cluster in a phylogenetic tree based on 16S-23S rDNA internal transcribed spacer (ITS) region sequences for 586 bases. Pair-wise sequence similarities of the isolate in 16S rRNA gene sequences for 1,457 bases were 93.0-88.3% to the type strains of Asaia, Kozakia, Swaminathania, Acetobacter, Gluconobacter, Gluconacetobacter, Acidomonas, and Saccharibacter species. Restriction analysis of 16S-23S rDNA ITS regions discriminated isolate AC28(T) from the type strains of Asaia and Kozakia species. Cells were non-motile. Colonies were pink, shiny, and smooth. The isolate produced acetic acid from ethanol. Oxidation of acetate and lactate was negative. The isolate grew on glutamate agar and mannitol agar. Growth was positive on 30% D-glucose (w/v) and in the presence of 0.35% acetic acid (w/v), but not in the presence of 1.0% KNO(3) (w/v). Ammoniac nitrogen was hardly assimilated on a glucose medium or a mannitol medium. Production of dihydroxyacetone from glycerol was weakly positive. The isolate did not produce a levan-like polysaccharide on a sucrose medium. Major isoprenoid quinone was Q-10. DNA base composition was 63.1 mol% G+C. On the basis of the results obtained, Neoasaia gen. nov. was proposed with Neoasaia chiangmaiensis sp. nov. The type strain was isolate AC28(T) (=BCC 15763(T) =NBRC 101099(T)).
authors.affiliation: BIOTEC Culture Collection (BCC), BIOTEC Central Research Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, Thailand.
authors.forename: Pattaraporn
authors.initials: P
authors.lastname: Yukphan
authors.forename: Taweesak
authors.initials: T
authors.lastname: Malimas
authors.forename: Wanchern
authors.initials: W
authors.lastname: Potacharoen
authors.forename: Somboon
authors.initials: S
authors.lastname: Tanasupawat
authors.forename: Morakot
authors.initials: M
authors.lastname: Tanticharoen
authors.forename: Yuzo
authors.initials: Y
authors.lastname: Yamada
mesh_terms: D019342:Acetic Acid / Q000378:metabolism; D016947:Acetobacteraceae / Q000145:classification / Q000235:genetics; D020561:Alphaproteobacteria / Q000145:classification* / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer / Q000032:analysis; D035264:Flowers / Q000382:microbiology; D020459:Genes, rRNA; D020939:Zingiber officinale / Q000382:microbiology; D008969:Molecular Sequence Data; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012338:RNA, Ribosomal, 23S / Q000235:genetics; D015183:Restriction Mapping; D013785:Thailand; D014882:Water-Electrolyte Balance
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012336:RNA, Ribosomal, 16S; D012338:RNA, Ribosomal, 23S; D019342:Acetic Acid