GouR, a TetR family transcriptional regulator, coordinates the biosynthesis and export of gougerotin in Streptomyces graminearus.

ABSTRACT: Gougerotin is a peptidyl nucleoside antibiotic. It functions as a specific inhibitor of protein synthesis by binding ribosomal peptidyl transferase and exhibits a broad spectrum of biological activities. gouR, situated in the gougerotin biosynthetic gene cluster, encodes a TetR family transcriptional regulatory protein. Gene disruption and genetic complementation revealed that gouR plays an important role in the biosynthesis of gougerotin. Transcriptional analysis suggested that GouR represses the transcription of the gouL-to-gouB operon consisting of 11 structural genes and activates the transcription of the major facilitator superfamily (MFS) transporter gene (gouM). Electrophoresis mobility shift assays (EMSAs) and DNase I footprinting experiments showed that GouR has specific DNA-bindi

SUBMITTER: Wei J 

PROVIDER: S-EPMC3911114 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature