RDF/XMLNTriplesTurtleShow queryShare
SubjectPredicateObject
http://purl.uniprot.org/citations/7773404http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/7773404http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/7773404http://www.w3.org/2000/01/rdf-schema#comment"Chemical mutagenesis of the AmpC beta-lactamase-hyperinducible Escherichia coli strain SN0301/pNu305 carrying the cloned ampC and ampR genes from Citrobacter freundii OS60 gave four independent mutants in which beta-lactamase was no longer inducible, or was inducible only to a low level, by beta-lactam antibiotics. The genes ampC, ampR, ampD and ampE, which were essential for beta-lactamase induction, were functional in these mutants. In all four mutants, the sites of mutation were mapped to 9.9 min on the E. coli chromosome. Complementation with wild-type ampG restored inducibility of beta-lactamase to wild-type levels. The nucleotide sequence of all four mutant ampG alleles (ampG1, ampG3, ampG4 and ampG5) was determined. In three of the mutants, a single base exchange led to an amino acid change from glycine to aspartate at different sites in the deduced amino acid sequence. In the fourth mutant (ampG4), with low-level inducibility, the nucleotide sequence was identical to wild-type ampG. Spontaneous back-mutation of the chromosomal ampG1 mutant resulted in restoration of wild-type inducibility and a return to the wild-type ampG sequence. Unspecific induction by components of the growth medium was also dependent on intact ampG function."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.org/dc/terms/identifier"doi:10.1099/13500872-141-5-1085"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.org/dc/terms/identifier"doi:10.1099/13500872-141-5-1085"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Schmidt H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Schmidt H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Barth H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Barth H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Korfmann G."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Korfmann G."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Martin H.H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/author"Martin H.H."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/date"1995"xsd:gYear
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/date"1995"xsd:gYear
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/name"Microbiology"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/name"Microbiology"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/pages"1085-1092"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/pages"1085-1092"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/title"The signal transducer encoded by ampG is essential for induction of chromosomal AmpC beta-lactamase in Escherichia coli by beta-lactam antibiotics and 'unspecific' inducers."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/title"The signal transducer encoded by ampG is essential for induction of chromosomal AmpC beta-lactamase in Escherichia coli by beta-lactam antibiotics and 'unspecific' inducers."xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/volume"141"xsd:string
http://purl.uniprot.org/citations/7773404http://purl.uniprot.org/core/volume"141"xsd:string
http://purl.uniprot.org/citations/7773404http://www.w3.org/2004/02/skos/core#exactMatchhttp://purl.uniprot.org/pubmed/7773404
http://purl.uniprot.org/citations/7773404http://www.w3.org/2004/02/skos/core#exactMatchhttp://purl.uniprot.org/pubmed/7773404