Decreased Growth and Antibiotic Production in Streptomyces coelicolor A3(2) by Deletion of a Highly Conserved DeoR Family Regulator, SCO1463
Tóm tắt
Streptomyces spp. have been isolated from different environmental niches and are known to exhibit diversity in secondary metabolism. They have complex regulation system to control secondary metabolism, however it is difficult to prioritize the importance of specific regulator among the thousands of global or cluster-situated genes that may regulate secondary metabolism in different Streptomyces strains. Here we suggest a simple homology-based selection method to find out important regulators by comparing seven Streptomyces strains finding highly homologous regulators in various Streptomyces strains and showed highly homologous 11 regulators containing four well known regulators such as BldM, IclR, WhiD and NdgR. Among various regulators, we showed a putative transcriptional regulator in Streptomyces coelicolor A3(2), SCO1463 playing a pivotal role in growth, antibiotic production (actinorhodin[ACT] and undecylprodigiosin [RED] production), and production/utilization of organic acids such as propionate and succinate by making comparisons between the deletion mutant and the wild type strain. Although high homology in various strains does not always mean the importance of a gene, we suggested a criterion on which regulator should be studied first and which would be more important among more than one thousand regulators.
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