8pck

Structure of serine-beta-lactamase CTX-M-14 following the time-resolved active site binding of boric acid and subsequent glycerol-boric acid-ester formation, 0 ms

spinqualitylabelsall models 8pck, resolution 1.53Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8pck is a 1 chain structure with sequence from Klebsiella pneumoniae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.53Å Ligands: BO4, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function D2D9A0_KLEPN Publication Abstract from PubMed The emergence and spread of antibiotic resistance represent a growing threat to public health. Of particular concern is the appearance of beta-lactamases, which are capable to hydrolyze and inactivate the most important class of antibiotics, the beta-lactams. Effective beta-lactamase inhibitors and mechanistic insights into their action are central in overcoming this type of resistance, and in this context boronate-based beta-lactamase inhibitors were just recently approved to treat multidrug-resistant bacteria. Using boric acid as a simplified inhibitor model, time-resolved serial crystallography was employed to obtain mechanistic insights into binding to the active site serine of beta-lactamase CTX-M-14, identifying a reaction time frame of 80-100 ms. In a next step, the subsequent 1,2-diol boric ester formation with glycerol in the active site was monitored proceeding in a time frame of 100-150 ms. Furthermore, the displacement of the crucial anion in the active site of the beta-lactamase was verified as an essential part of the binding mechanism of substrates and inhibitors. In total, 22 datasets of beta-lactamase intermediate complexes with high spatial resolution of 1.40-2.04 A and high temporal resolution range of 50-10,000 ms were obtained, allowing a detailed analysis of the studied processes. Mechanistic details captured here contribute to the understanding of molecular processes and their time frames in enzymatic reactions. Moreover, we could demonstrate that time-resolved crystallography can serve as an additional tool for identifying and investigating enzymatic reactions. Time-resolved crystallography of boric acid binding to the active site serine of the beta-lactamase CTX-M-14 and subsequent 1,2-diol esterification.,Prester A, Perbandt M, Galchenkova M, Oberthuer D, Werner N, Henkel A, Maracke J, Yefanov O, Hakanpaa J, Pompidor G, Meyer J, Chapman H, Aepfelbacher M, Hinrichs W, Rohde H, Betzel C Commun Chem. 2024 Jul 5;7(1):152. doi: 10.1038/s42004-024-01236-w. PMID:38969718 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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