Streptomyces kalpinensis sp. nov., an actinomycete isolated from a salt water beach.

Abstract

A novel actinobacterium designated TRM 46509T was isolated from a salt water beach at Kalpin, Xinjiang, north-west China. The strain was aerobic and Gram-stain-positive, with an optimum NaCl concentration for growth of 1 % (w/v). The isolate formed sparse aerial mycelium and produced spiral spores at the end of the aerial mycelium on Gauze's No. 1 medium. The isolate contained ll-diaminopimelic acid as the diagnostic diamino acid and ribose as the major whole-cell sugar. The polar lipids included diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol, phosphatidylinositol mannosides and an unidentified phospholipid. The predominant menaquinones were MK-9(H2), MK-9(H6) and MK-9(H8). The major fatty acids were C16:0, iso-C16 : 0, anteiso-C15 : 0, iso-C15 : 0 and iso-C14 : 0. The G+C content of the DNA was 69.3 mol%. Phylogenetic analysis showed that strain TRM 46509T shared 16S rRNA gene sequence similarity of 97.6 % with the closest described species Streptomyces tacrolimicus ATCC 55098T. On the basis of evidence from this polyphasic study, strain TRM 46509T should be designated as representing a novel species of the genus Streptomyces, for which the name Streptomyces kalpinensis sp. nov. is proposed. The type strain is TRM 46509T (=CCTCC AA 2015028T=KCTC 39667T).