title: Aeromicrobium halocynthiae sp. nov., a taurocholic acid-producing bacterium isolated from the marine ascidian Halocynthia roretzi.
abstract: A marine bacterium, strain KME 001(T), was isolated from the siphon tissue of a marine ascidian, Halocynthia roretzi, collected off the coast of Gangneung, Korea. Strain KME 001(T) was a Gram-positive, aerobic, non-spore-forming, rod-shaped and non-motile bacterium. Phylogenetic analysis using 16S rRNA gene sequences revealed that strain KME 001(T) clustered with the genus Aeromicrobium and was closely related to Aeromicrobium ginsengisoli, Aeromicrobium erythreum and Aeromicrobium ponti with 97.7, 97.6 and 97.5 % sequence similarities, respectively. The strain was capable of growth at a variety of temperatures (10-42°C) and over a broad pH range (5.0-10.0). NaCl was required for robust growth of the strain. The diagnostic diamino acid of the cell-wall peptidoglycan was ll-diaminopimelic acid. The predominant menaquinone was MK-9(H(4)). The predominant fatty acids were C(18 : 1)ω9c, C(16 : 0) and 10-methyl C(18 : 0). The DNA-DNA hybridization analyses showed that DNA-DNA relatedness values between strain KME 001(T) and its nearest neighbours, A. ginsengisoli KCTC 19207(T), A. erythreum KCCM 41104(T) and A. ponti KACC 20565(T), were 49.6, 57.1 and 63.5 %, respectively. The DNA G+C content of strain KME 001(T) was 75.9mol%. Chemical investigation of the liquid culture medium of strain KME 001(T) led to the isolation of taurocholic acid as a major secondary metabolite. On the basis of phylogenetic and phenotypic data, strain KME 001(T) is classified as representing a novel species of the genus Aeromicrobium, for which the name Aeromicrobium halocynthiae sp. nov. is proposed. The type strain is KME 001(T) (=JCM 15749(T)=KCCM 90079(T)).
authors.affiliation: Division of Applied Marine Biotechnology and Engineering, Faculty of Marine Bioscience and Technology, Gangneung-Wonju National University, Gangneung, 210-702, Republic of Korea.|Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea.
authors.forename: Sung Hun
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea.
authors.forename: Hyun Ok
authors.initials: HO
authors.lastname: Yang
authors.affiliation: Division of Applied Marine Biotechnology and Engineering, Faculty of Marine Bioscience and Technology, Gangneung-Wonju National University, Gangneung, 210-702, Republic of Korea.
authors.forename: Young Chang
authors.initials: YC
authors.lastname: Sohn
authors.affiliation: Korea Institute of Science and Technology, Gangneung, Gangwondo, 210-340, Republic of Korea.
authors.forename: Hak Cheol
authors.initials: HC
authors.lastname: Kwon
mesh_terms: D000192:Actinomycetales / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D000818:Animals; D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000235:genetics; D003960:Diaminopimelic Acid / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D056910:Republic of Korea; D017422:Sequence Analysis, DNA; D013656:Taurocholic Acid / Q000096:biosynthesis*; D014561:Urochordata / Q000382:microbiology*; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S; D024482:Vitamin K 2; C073355:menaquinone 9; D003960:Diaminopimelic Acid; D013656:Taurocholic Acid