title: New variant of CTX-M-type extended-spectrum beta-lactamases, CTX-M-71, with a Gly238Cys substitution in a Klebsiella pneumoniae isolate from Bulgaria.
abstract: A single Klebsiella pneumoniae strain isolated in a Bulgarian hospital was found to produce CTX-M-71, a new CTX-M variant characterized by one amino acid substitution from glycine to cysteine at position 238 in comparison to CTX-M-15. This exchange decreased the hydrolytic activity of the beta-lactamase for cefotaxime, ceftazidime, and cefepime.
authors.affiliation: MICOER Institute, Munich, Germany.
authors.forename: Ines
authors.initials: I
authors.lastname: Schneider
authors.forename: Anne Marie
authors.initials: AM
authors.lastname: Queenan
authors.forename: Rumyana
authors.initials: R
authors.lastname: Markovska
authors.forename: Boyka
authors.initials: B
authors.lastname: Markova
authors.forename: Emma
authors.initials: E
authors.lastname: Keuleyan
authors.forename: Adolf
authors.initials: A
authors.lastname: Bauernfeind
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002031:Bulgaria; D000077723:Cefepime; D002439:Cefotaxime / Q000494:pharmacology; D002442:Ceftazidime / Q000494:pharmacology; D002511:Cephalosporins / Q000494:pharmacology; D007700:Kinetics; D007711:Klebsiella pneumoniae / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics / Q000302:isolation & purification; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D000077723:Cefepime; D002442:Ceftazidime; D001618:beta-Lactamases; D002439:Cefotaxime