4jf6 | pdb_00004jf6

Structure of OXA-23 at pH 7.0

spinqualitylabelsall models 4jf6, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4jf6 is a 1 chain structure with sequence from Acinetobacter baumannii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, K, PEG NonStd Res: KCX Related: 4jf4, 4jf5 Gene: ari-1, bla(OXA-23), bla-OXA-23, bla-oxa-23, blaOXA-23, OXA-23, oxa-23, oxa23 (Acinetobacter baumannii) Activity: Beta-lactamase, with EC number 3.5.2.6 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Dissemination of Acinetobacter baumannii strains harboring class D beta-lactamases producing resistance to carbapenem antibiotics severely limits our ability to treat deadly Acinetobacter infections. Susceptibility determination in the A. baumannii background and kinetic studies with a homogeneous preparation of OXA-23 beta-lactamase, the major carbapenemase present in A. baumannii, document the ability of this enzyme to manifest resistance to last-resort carbapenem antibiotics. We also report three X-ray structures of OXA-23: apo OXA-23 at two different pH values, and wild-type OXA-23 in complex with meropenem, a carbapenem substrate. The structures and dynamics simulations reveal an important role for Leu166, whose motion regulates the access of a hydrolytic water molecule to the acyl-enzyme species in imparting carbapenemase activity. Structural Basis for Carbapenemase Activity of the OXA-23 beta-Lactamase from Acinetobacter baumannii.,Smith CA, Antunes NT, Stewart NK, Toth M, Kumarasiri M, Chang M, Mobashery S, Vakulenko SB Chem Biol. 2013 Sep 19;20(9):1107-15. doi: 10.1016/j.chembiol.2013.07.015. Epub, 2013 Sep 5. PMID:24012371 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-lactamase

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