Kribbella Monticola Sp Nov., A Novel Actinomycete Isolated From Soil

A novel actinobacterium, designated strain NEAU-SW521(T), was isolated from soil collected from Xianglu Mountain, Heilongjiang province, north PR China. The results of analysis of the 16S rRNA gene indicated that NEAU-SW521(T) represented a member of the genus Kribbella. The results of phylogenetic analyses using the 16S rRNA gene and multilocus sequence analysis using the concatenated gene sequences of the gyrB, rpoB, relA, recA and atpD genes all indicated that the strain formed a clade with Kribbella alba DSM 15500(T) (99.16 %), Kribbella ginsengisoli JCM 16928(T) (98.96 %), Kribbella catacumbae JCM 14968(T) (98.82 %), Kribbella sancticallisti JCM 14969(T) (98.62 %), Kribbella qitaiheensis NEAU-GQTH2-3(T) (98.61 %) and Kribbella koreensis JCM 10977(T) (98.47 %). The cell wall contained LL-diaminopimelic acid as the major diamino acid and the whole-cell hydrolysates were ribose, glucose and galactose. The major polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, phosphatidylinositol and an unidentified phospholipid. The predominant menaquinone was MK-9(H-4). Major fatty acids were iso-C-16:0 and anteiso-C-15:0. These chemotaxonomic data supported the affiliation of NEAU-SW521(T) to the genus Kribbella. The DNA G+C content was 67.8 mol%. Furthermore, the strain could be clearly distinguished by concatenated gene genetic distances, the combination of DNA-DNA hybridization results and some phenotypic characteristics. Therefore, it is proposed that NEAU-SW521(T) represents a novel species of the genus Kribbella, for which the name Kribbella monticola sp. nov. is proposed. The type strain is NEAU-SW521(T) (=CGMCC 4.7465(T)=DSM 105770(T)).