SCO5745, a Bifunctional RNase J Ortholog, affects antibiotic production in streptomyces coelicolor

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Abstract

The bacterial RNases J are considered bifunctional RNases possessing both endo- and exonucleolytic activities. We have isolated an RNase J ortholog from Streptomyces coelicolor encoded by the gene sco5745. We overexpressed a decahistidine-tagged version of SCO5745 and purified the overexpressed protein by immobilized metal ion affinity chromatography. We demonstrated the presence of both 5'-to-3' exonucleolytic and endonucleolytic activities on the Bacillus subtilis thrS transcript. Exonucleoytic activity predominated with 5' monophosphorylated thrS, while endonucleolytic activity predominated with 5'triphosphorylated thrS. While sco5745 is the only RNase J allele in S. coelicolor, the gene is not essential. Its disruption resulted in delayed production of the antibiotic actinorhodin, overproduction of undecylprodigiosin, and diminished production of the calcium-dependent antibiotic, in comparison with the parental strain. © 2014, American Society for Microbiology.

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Bralley, P., Aseem, M., & Jones, G. H. (2014). SCO5745, a Bifunctional RNase J Ortholog, affects antibiotic production in streptomyces coelicolor. Journal of Bacteriology, 196(6), 1197–1205. https://doi.org/10.1128/JB.01422-13

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