title: Regulation of a macrolide resistance-beta-galactosidase (ermC-lacZ) gene fusion in Escherichia coli.
abstract: A fusion constructed between the putative attenuator plus the first 219 nucleotides of the ermC (erythromycin resistance) structural gene and a 5' terminally deleted lacZ gene produced a moderate, basal level of beta-galactosidase which was increased by erythromycin addition. Another construction containing an intact ermC gene in addition to the fusion produced lower levels of beta-galactosidase, suggesting that the ermC gene product exerts negative feedback control on expression.
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005696:Galactosidases / Q000235:genetics*; D005796:Genes; D005798:Genes, Bacterial; D005809:Genes, Regulator; D007763:Lac Operon; D012333:RNA, Messenger / Q000235:genetics; D001616:beta-Galactosidase / Q000235:genetics*
chemical_list: D012333:RNA, Messenger; D004262:DNA Restriction Enzymes; D005696:Galactosidases; D001616:beta-Galactosidase