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The master regulator, DnrI of Streptomyces peucetius is a member of the family of transcriptional activator, Streptomyces antibiotic regulatory proteins (SARP), which controls the biosynthesis of antitumor anthracycline, daunorubicin (DNR) and doxorubicin (DXR). The binding of DnrI to the heptameric repeat sequence found within the −35 promoter region of biosynthetic gene, dpsE activates it. To combat...
DrrC is a DNA-binding protein of Streptomyces peucetius that provides self-resistance against daunorubicin, the antibiotic produced by the organism. DrrC was expressed in E.coli and purified by using N-terminal MBP-tag which retained DNA-binding property in spite of the tag. Mobility shift assay confirmed the interaction of 313bp DNA that has the dnrI promoter, daunorubicin and MBP-DrrC in the presence...
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