title: Characterization of a naturally occurring class D beta-lactamase from Achromobacter xylosoxidans.
abstract: A chromosomally encoded class D beta-lactamase, OXA-114, was characterized from Achromobacter xylosoxidans strain CIP69598. beta-Lactamase OXA-114 shared 56% amino acid identity with the naturally occurring class D beta-lactamase of Burkholderia cenocepacia and 42% identity with the acquired oxacillinases OXA-9 and OXA-18. OXA-114 has a narrow-spectrum hydrolysis profile, although it includes imipenem, at a very low level. PCR and sequencing revealed that bla(OXA-114)-like genes were identified in all A. xylosoxidans strains tested (n = 5), indicating that this beta-lactamase is naturally occurring in that species. Induction experiments with imipenem and cefoxitin did not show inducibility of bla(OXA-114) expression.
authors: Service de Bactériologie-Virologie, INSERM U914, Emerging Resistance to Antibiotics, Hôpital de Bicêtre, Assistance Publique/Hôpitaux de Paris, Faculté deMédecine Paris-Sud, Université Paris XI, 94275 K.-Bicêtre, France.
authors: Yohei
authors: Y
authors: Doi
authors: Laurent
authors: L
authors: Poirel
authors: David L
authors: DL
authors: Paterson
authors: Patrice
authors: P
authors: Nordmann
mesh_terms: D042441:Achromobacter denitrificans / Q000187:drug effects* / Q000201:enzymology* / Q000235:genetics; D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D003001:Cloning, Molecular; D006801:Humans; D007700:Kinetics; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D017422:Sequence Analysis, DNA; D001618:beta-Lactamases / Q000145:classification / Q000235:genetics / Q000378:metabolism; D047090:beta-Lactams / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D047090:beta-Lactams; D001618:beta-Lactamases; C108449:oxacillinase