2bg1

Active site restructuring regulates ligand recognition in classA Penicillin-binding proteins (PBPs)

spinqualitylabelsall models 2bg1, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2bg1 is a 1 chain structure with sequence from Streptococcus pneumoniae R6. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: CL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q7CRA4_STRR6 Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Bacterial cell division is a complex, multimolecular process that requires biosynthesis of new peptidoglycan by penicillin-binding proteins (PBPs) during cell wall elongation and septum formation steps. Streptococcus pneumoniae has three bifunctional (class A) PBPs that catalyze both polymerization of glycan chains (glycosyltransfer) and cross-linking of pentapeptidic bridges (transpeptidation) during the peptidoglycan biosynthetic process. In addition to playing important roles in cell division, PBPs are also the targets for beta-lactam antibiotics and thus play key roles in drug-resistance mechanisms. The crystal structure of a soluble form of pneumococcal PBP1b (PBP1b*) has been solved to 1.9 A, thus providing previously undescribed structural information regarding a class A PBP from any organism. PBP1b* is a three-domain molecule harboring a short peptide from the glycosyltransferase domain bound to an interdomain linker region, the transpeptidase domain, and a C-terminal region. The structure of PBP1b* complexed with beta-lactam antibiotics reveals that ligand recognition requires a conformational modification involving conserved elements within the cleft. The open and closed structures of PBP1b* suggest how class A PBPs may become activated as novel peptidoglycan synthesis becomes necessary during the cell division process. In addition, this structure provides an initial framework for the understanding of the role of class A PBPs in the development of antibiotic resistance. Active site restructuring regulates ligand recognition in class A penicillin-binding proteins.,Macheboeuf P, Di Guilmi AM, Job V, Vernet T, Dideberg O, Dessen A Proc Natl Acad Sci U S A. 2005 Jan 18;102(3):577-82. Epub 2005 Jan 6. PMID:15637155 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Penicillin-binding protein 3D structures

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