nov., isolated from Xiaoerkule lake in Xinjiang, China

A novel actinomycete, strain TRM 41368^T, was isolated from a silt sample from Xiaoerkule lake in Xinjiang province, China, and was examined using a polyphasic approach. Strain TRM 41368^T was aerobic, Gram-stain-positive, with an optimum NaCl concentration for growth of 5 % (w/v), and an optimum temperature for growth of 35-37 °C. On the basis of 16S rRNA gene sequence analysis, strain TRM 41368^T was most closely related to Glycomycesfuscus TRM 49117^T (98.46 % similarity). However, it had a relatively low DNA-DNA relatedness value with G. fuscus TRM 49117^T (ANI=70.59 %). The organism had chemical and morphological features typical of the genus Glycomyces. The cell wall of TRM 41368^T contained meso-diaminopimelic acid; xylose, ribose and glucose were the major whole-cell sugars. The diagnostic polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylinositol and phosphatidylinositolmannosides. The predominant menaquinone was MK-9(H6). The major fatty acids were C18 : 1ω9c, C16 : 0, iso-C16 : 0, anteiso-C17 : 0 and anteiso-C15 : 0. The G+C content of the DNA was 69.9 mol%. On the basis of the polyphasic evidence, strain TRM 41368^T should be designated as a novel species of the genus Glycomyces, for which the name Glycomyces xiaoerkulensis sp. nov. is proposed. The type strain is TRM 41368^T (=CCTCC AA 2017005^T=KCTC 39932^T).

nov., a new species of actinobacteria isolated from marine sediment

A novel Glycomyces strain, designated as MH2460^T, was isolated from marine sediment collected from 12 m depth in Rostami seaport, Bushehr Province in Iran. On International Streptomyces Project 2 medium it produced branching substrate hyphae that developed into a large number of irregularly shaped spores in 8 days. It showed optimal growth at 25-35 °C, pH 6.0-8.0 and in salinity between 2.5-5 % (w/v) NaCl. Chemotaxonomic and molecular characteristics of the isolate matched descriptions for members of the genus Glycomyces. Whole-cell hydrolysates of strain MH2460^T contained meso-diaminopimelic acids along with glucose, ribose and small traces of xylose and galactose. The phospholipids comprised diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannosides as well as two unidentified phosphoglycolipids, one unidentified phospholipid and an unidentified aminolipid. The predominant menaquinones were MK-11(H4) and MK-10(H4). The fatty-acid pattern was mainly composed of anteiso-C15 : 0, anteiso-C17 : 0, iso-C15 : 0 and iso-C16 : 0. The strain belongs to the genus Glycomyces based on 16S rRNA gene sequence with the highest pairwise sequence identity (98.3 %) with Glycomyces phytohabitans KLBMP 1483^T. The DNA-DNA hybridization value showed 53.9±2.7 % identity when MH2460^T was compared to this reference strain. The G+C content of the DNA was 70.2 mol%. Based on phenotypic, biochemical, chemotaxonomic and genotypic features, strain MH2460^T (DSM 103727^T=UTMC 2460^T=NCCB 100631^T) is considered to represent a novel species of the genus Glycomyces, for which the name Glycomyces sediminimaris is proposed.