Nonomuraea corallina sp. nov. isolated from coastal sediment in Samila Beach Thailand insights into secondary metabolite synthesis as anticancer potential

Abstract

A novel marine actinomycete designated strain MCN248T was isolated from the coastal sediment in Songkhla Province Thailand. Based on the 16S rRNA gene sequences the new isolate was closely related to Nonomuraea harbinensis DSM45887T (99.2%) and Nonomuraea ferruginea DSM43553T (98.6%). Phylogenetic analyzes based on the 16S rRNA gene sequences showed that strain MCN248T was clustered with Nonomuraea harbinensis DSM45887T and Nonomuraea ferruginea DSM43553T. However the digital DNA朌NA hybridization analyzes presented a low relatedness of 40.2% between strain MCN248T and the above closely related strains. This strain contained meso-diaminopimelic acid. The acyl type of the peptidoglycan was acetyl and mycolic acids were absent. The major menaquinones were MK-9(H2) and MK-9(H4). The whole cell sugars consisted of madurose ribose mannose and glucose. Diphosphatidylglycerol hydroxyl-phosphatidylethanolamine phosphatidylethanolamine phosphatidylinositol and phosphatidylglycerol were detected as the major phospholipids. The predominant cellular fatty acids were iso-C16:0 (40.4%) 10-methyl-C17:0 (22.1%) and C17:1 (Formula presented.) 8c (10.9%). The DNA G + C content of the genomic DNA was 71.7%. With in silico analyzes the antiSMASH platform uncovered a diverse 29 secondary metabolite biosynthesis arsenal including non-ribosomal peptide synthetase (NRPS) and polyketide synthase (PKS) of strain MCN248T with a high prevalence of gene cluster encoding pathways for the production of anticancer and cytotoxic compounds. Consistently the crude extract could inhibit colorectal HCT-116 cancer cells at a final concentration of 50 ?g/mL. Based on the polyphasic approach strain MCN248 was designated as a novel species of the genus Nonomuraea for which the name Nonomuraea corallina sp. nov. is proposed. The type strain of the type species is MCN248T (=NBRC115966T = TBRC17110T). Copyright ? 2023 Ngamcharungchit Matsumoto Suriyachadkun Panbangred Inahashi and Intra.