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The insertion identified the SCO7168 open reading frame whose predicted product is a GntR family transcriptional regulator. Here, we show that this gene acts to repress transcription of itself as well as a series of genes immediately adjacent to it on the<jats:italic>S. coelicolor<\/jats:italic>chromosome that likely encode an ATP-binding cassette (ABC)-type transporter for carbohydrate uptake. Transcription of this transporter is strongly induced by growth on relatively poor carbon sources such as trehalose and melibiose and weakly induced by lactose and glycerol but not glucose, and induction is not repressed by the presence of glucose. Constructed deletions of the ABC transporter itself resulted in the suppression of the original transposon mutation, suggesting that inappropriate expression of the ABC transporter is responsible, at least in part, for the mutant phenotype. Because this transporter responds to the presence of \u03b1-glucosides and has similarity to two other carbohydrate transporters of this class, we have named the genes of the transporter<jats:italic>agl3E<\/jats:italic>,<jats:italic>agl3F<\/jats:italic>, and<jats:italic>agl3G<\/jats:italic>and the GntR-like protein that regulates transcription of the transporter<jats:italic>agl3R<\/jats:italic>in accordance with established nomenclature. We suggest that<jats:italic>agl3R<\/jats:italic>is one of a number of homologous proteins in<jats:italic>Streptomyces<\/jats:italic>(there are 57 putative GntR family regulators in the<jats:italic>S. coelicolor<\/jats:italic>genome) that respond to nutritional and\/or environmental signals to control genes that affect morphogenesis and antibiotic production.<\/jats:p>","DOI":"10.1128\/jb.00898-06","type":"journal-article","created":{"date-parts":[[2006,10,18]],"date-time":"2006-10-18T23:23:35Z","timestamp":1161213815000},"page":"7477-7487","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":74,"title":["A New GntR Family Transcriptional Regulator in<i>Streptomyces coelicolor<\/i>Is Required for Morphogenesis and Antibiotic Production and Controls Transcription of an ABC Transporter in Response to Carbon Source"],"prefix":"10.1128","volume":"188","author":[{"given":"Brandan","family":"Hillerich","sequence":"first","affiliation":[{"name":"Genetics Department, University of Georgia, Athens, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janet","family":"Westpheling","sequence":"additional","affiliation":[{"name":"Genetics Department, University of Georgia, Athens, Georgia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1007\/BF00283514","volume":"244","year":"1994","unstructured":"Angell, S., C. 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