Aeromicrobium flavum sp. nov., isolated from air

College of Life Sciences, Wuhan University, Wuhan 430072, PR China Correspondence Chengxiang Fang cxfang{at}whu.edu.cn A Gram-positive, non-motile, facultatively anaerobic actinobacterium, designated TYLN1 T , was isolated from an air sample from the campus of Wuhan University, China, and subjected to a polyphasic taxonomic study. Strain TYLN1 T grew optimally at pH 7.0 and 30 °C. Analysis of 16S rRNA gene sequence similarities revealed that the organism belongs to the genus Aeromicrobium . The G+C content of the strain was 73.3 mol%. The cell-wall diamino acid was LL -2,6-diaminopimelic acid, the predominant menaquinones were MK-9(H 4 ) and MK-8(H 4 ) and the predominant fatty acid was C 18 : 1 9 c (68.38 %). These chemotaxonomic data also support the affiliation of strain TYLN1 T to the genus Aeromicrobium . The values for DNA–DNA hybridization between strain TYLN1 T and the phylogenetically closest relatives Aeromicrobium tamlense DSM 19087 T and Aeromicrobium panaciterrae DSM 17939 T were respectively 35 and 11.5 %. On the basis of the data from this study, the isolate represents a novel species, for which the name Aeromicrobium flavum sp. nov. is proposed. The type strain is TYLN1 T (=CCTCC AB 206046 T =DSM 19355 T ). The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain TYLN1 T is EF133690 .