화학공학소재연구정보센터
Applied Biochemistry and Biotechnology, Vol.192, No.4, 1224-1237, 2020
Awakening the Secondary Metabolite Pathways ofPromicromonospora kermanensisUsing Physicochemical and Biological Elicitors
The drug discovery rate is dramatically decreasing due to the rediscovery of known compounds. Genome mining approaches have revealed that a large portion of the actinobacterial genome that encodes bioactive metabolites is cryptic and not expressed under standard lab conditions. In the present study, we aimed to induce antibiotic encoding biosynthetic genes in a member ofMicrococcalesas a new species ofPromicromonospora,Promicromonospora kermanensis, by chemical and biological elicitors as it was considered to produce numerous valuable bioactive metabolites based on the whole genome results. Induction has been done via chemical (antibiotics, histone deacetylase inhibitors (HDAIs), rare earth elements (REEs), fatty acid synthesis inhibitors, and extreme pH changes) and biological elicitors (live and dead Gram-positive and negative bacteria). The results showed that valproic acid (as HDAIs), DMSO, lanthanum chloride (as REE), triclosan (as fatty acid synthesis inhibitors), alkaline pH, and supernatant ofPseudomonas aeruginosaUTMC 1404 culture could act as stimuli to provoke antibacterial synthetic pathways inPromicromonospora kermanensisDSM 45485. Moreover, it was revealed that eliciting agents in cell filtrated ofP. aeruginosaculture is resistant to detergent, acidic, and basic condition and have amphipathic nature. The inducing effect of alkaline pH on metabolite induction ofActinobacteriawas first reported in this study. In the follow-up studies, the induced antibacterial producing clusters can be subjected to the characterization, and the implemented approach in this study can be used for metabolites induction in other selected species.