A chromosomally encoded class D β-lactamase, OXA-114, was characterized from Achromobacter xylosoxidans strain CIP69598. β-Lactamase OXA-114 shared 56% amino acid identity with the naturally occurring class D β-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 blaOXA.114-like genes were identified in all A. xylosoxidans strains tested (n = 5), indicating that this β-lactamase is naturally occurring in that species. Induction experiments with imipenem and cefoxitin did not show inducibility of blaOXA.114 expression.
All Science Journal Classification (ASJC) codes