Micromonospora rifamycinica sp. nov., a novel actinomycete from mangrove sediment

Institute of Tropical Bioscience and Biotechnology/State Key Laboratory of Tropical Crop Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China Correspondence Shixiang Bao bsxhhq{at}yahoo.com.cn An actinomycete strain, AM105 T , that produces rifamycin, was isolated from mangrove sediment samples collected from the South China Sea. The strain showed closest 16S rRNA gene sequence similarity to Micromonospora matsumotoense (98.0 %). Chemotaxonomic characteristics of the isolate coincided with members of the genus Micromonospora . The value of DNA–DNA relatedness to M. matsumotoense (53.6 %) and phenotypic differences from phylogenetically related Micromonospora species indicated that this isolate belongs to a novel species, for which the name Micromonospora rifamycinica sp. nov. is proposed. The type strain is AM105 T (=CGMCC 4.2495 T =DSM 44983 T ). Abbreviations: DAP, diaminopimelic acid The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain AM105 T is AY561829 .