9fzp

Pseudomonas aeruginosa penicillin binding protein 3 in complex with cefepime

spinqualitylabelsall models 9fzp, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9fzp is a 1 chain structure with sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.7Å Ligands: CEF Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function FTSI_PSEAE Catalyzes cross-linking of the peptidoglycan cell wall at the division septum (By similarity). Binds penicillin (PubMed:20580675).[HAMAP-Rule:MF_02080] Publication Abstract from PubMed The breakthrough cephalosporin cefiderocol, approved for clinical use in 2019, has activity against many Gram-negative bacteria. The catechol group of cefiderocol enables it to efficiently enter bacterial cells via the iron/siderophore transport system thereby reducing resistance due to porin channel mutations and efflux pump upregulation. Limited information is reported regarding the binding of cefiderocol to its key proposed target, the transpeptidase penicillin binding protein 3 (PBP3). We report studies on the reaction of cefiderocol and the related cephalosporins ceftazidime and cefepime with Pseudomonas aeruginosa PBP3, including inhibition measurements, protein observed mass spectrometry, and X-ray crystallography. The three cephalosporins form analogous 3-exomethylene products with P. aeruginosa PBP3 following elimination of the C3' side chain. pIC(50) and k (inact)/K (i) measurements with isolated PBP3 imply ceftazidime and cefiderocol react less efficiently than cefepime and, in particular, meropenem with P. aeruginosa PBP3. Crystal structures inform on conserved and different interactions involved in binding of the three cephalosporins and meropenem to P. aeruginosa PBP3. The results will aid development of cephalosporins with improved PBP3 inhibition properties. Structural basis of Pseudomonas aeruginosa penicillin binding protein 3 inhibition by the siderophore-antibiotic cefiderocol.,Smith HG, Basak S, Aniebok V, Beech MJ, Alshref FM, Allen MD, Farley AJM, Schofield CJ Chem Sci. 2024 Sep 18. doi: 10.1039/d4sc04937c. PMID:39328188 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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