title: Labilibacter aurantiacus gen. nov., sp. nov., isolated from sea squirt (Styela clava) and reclassification of Saccharicrinis marinus as Labilibacter marinus comb. nov.
abstract: A Gram-stain-negative, facultatively anaerobic, orange-pigmented bacterium, designated HQYD1T, was isolated from a sea squirt (Styelaclava) and characterized using a polyphasic approach. Morphologically, strain HQYD1T exhibited rods with gliding motility. This novel isolate grew optimally at 28 °C in the presence of 2-3 % (w/v) NaCl. The 16S rRNA gene sequence was most similar to [Saccharicrinis] marinus Y11T (96.3 %), followed by Saccharicinis fermentans DSM 9555T (93.8 %). The dominant fatty acids of strain HQYD1T were identified as C16 : 0, C18 : 0 and iso-C15 : 0. Major polar lipids included an unidentified lipid and a phospholipid. The major respiratory quinone was found to be MK-7, and the genomic DNA G+C content was determined to be 35.1 mol%. Based on evidence from this taxonomic study, a novel genus, Labilibacter gen. nov., is proposed in the family Marinilabiliaceae with type species Labilibacter aurantiacus sp. nov. The type strain of the type species is HQYD1T (=MCCC 1K02304T=KCTC 42583T). As [Saccharicrinis] marinus Y11T clustered phylogenetically with strain HQYD1T, we also propose [Saccharicrinis] marinus Y11T be reclassified as Labilibacter marinus comb. nov. (type strain Y11T=CICC 10837T=KCTC 42400T).
authors.affiliation: College of Marine Science, Shandong University at Weihai, Weihai 264209, PR China.
authors.forename: De-Chen
authors.initials: DC
authors.lastname: Lu
authors.affiliation: College of Marine Science, Shandong University at Weihai, Weihai 264209, PR China.
authors.forename: Jin-Xin
authors.initials: JX
authors.lastname: Zhao
authors.affiliation: College of Marine Science, Shandong University at Weihai, Weihai 264209, PR China.
authors.forename: Feng-Qing
authors.initials: FQ
authors.lastname: Wang
authors.affiliation: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, PR China.
authors.forename: Zhi-Hong
authors.initials: ZH
authors.lastname: Xie
authors.affiliation: College of Marine Science, Shandong University at Weihai, Weihai 264209, PR China.
authors.forename: Zong-Jun
authors.initials: ZJ
authors.lastname: Du
mesh_terms: D000818:Animals; D015373:Bacterial Typing Techniques; D041963:Bacteroidetes / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D001482:Base Composition; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry; D010802:Phylogeny; D010858:Pigmentation; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D014561:Urochordata / Q000382:microbiology*; D024482:Vitamin K 2 / Q000031:analogs & derivatives / Q000737:chemistry
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D010743:Phospholipids; D012336:RNA, Ribosomal, 16S; D024482:Vitamin K 2; C062629:menaquinone 7