title: Sequencing and analysis of four new Enterobacter ampD Alleles.
abstract: Sequences of ampD genes from wild-type, temperature-sensitive, and stably derepressed mutants of the wild-type strain of Enterobacter cloacae 029 and the hyperinducible strain E. cloacae 1194E were determined and compared with the ampD gene of the wild-type strain E. cloacae 14. Seventy nucleotide differences were found between the wild-type sequences, resulting in 13 amino acid changes. The deduced amino acid changes do not correspond to published AmpC regulation mutations and expand the number of known mutations leading to altered AmpC beta-lactamase expression in members of the family Enterobacteriaceae.
authors.affiliation: Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, Nebraska, USA.
authors.forename: A F
authors.initials: AF
authors.lastname: Ehrhardt
authors.forename: C C
authors.initials: CC
authors.lastname: Sanders
authors.forename: J R
authors.initials: JR
authors.lastname: Romero
authors.forename: J S
authors.initials: JS
authors.lastname: Leser
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D016972:Enterobacter cloacae / Q000201:enzymology / Q000235:genetics*; D016368:Frameshift Mutation; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009154:Mutation; D009238:N-Acetylmuramoyl-L-alanine Amidase / Q000235:genetics*; D010641:Phenotype; D017422:Sequence Analysis, DNA; D013696:Temperature; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; C062460:AmpD protein, Bacteria; D009238:N-Acetylmuramoyl-L-alanine Amidase; D001618:beta-Lactamases