Three novel actinomycete strains, designated TRM66264-DLMT, TRM88002T and TRM88003T, were isolated by using polyaspartic acid as a water-retaining agent for the enrichment in situ. The 16S rRNA gene sequence and phylogenetic analyses of three strains indicated that they belonged to the genus Actinoplanes . The phylogenetically closest strains of TRM66264-DLMT, TRM88002T and TRM88003T were Actinoplanes bogorensis LIPI11-2-Ac043T (98.4 %), Actinoplanes abujensis A4029T (98.0 %) and Actinoplanes ferrugineus IFO15555T (98.1 %), respectively. The major polar lipids of strains TRM66264-DLMT and TRM88002T were phosphatidylethanolamine and disphosphatidylglycerol, while strain TRM88003T only had phosphatidylethanolamine. The predominant menaquinones of strain TRM66264-DLMT were identified as MK-9(H4) and MK-9 (H6). Strains TRM88002T and TRM88003T had MK-9(H4). The cell-wall peptidoglycan of three strains contained meso-diaminopimelic acid. The whole-cell sugars of strain TRM66264-DLMT were identified as arabinose, glucose, galactose and xylose. Strains TRM88002T and TRM88003T mainly had arabinose and glucose. The DNA G+C content of strains TRM66264-DLMT, TRM88002T and TRM88003T were 70.48, 70.46 and 70.64 mol%, respectively. Genotypic and phenotypic analysis confirmed that all three strains sre new members of the genus Acinoplanes. Therefore, it is proposed that strains TRM66264-DLMT, TRM88002T and TRM88003T represent three novel species of the genus Actinoplanes , for which the names Actinoplanes polyasparticus sp. nov. (type strain TRM66264-DLMT=CCTCC AA 2021015T=LMG 32389T), Actinoplanes hotanensis sp. nov. (type strain TRM88002T=CCTCC AA 2021036T=LMG 32621T) and Actinoplanes aksuensis sp. nov. (type strain TRM88003T=CCTCC AA 2021037 T=LMG 32622T) are proposed.
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