4e3l

Crystal structure of AmpC beta-lactamase in complex with a 3-chloro-4-tetrazolyl benzene sulfonamide boronic acid inhibitorCrystal structure of AmpC beta-lactamase in complex with a 3-chloro-4-tetrazolyl benzene sulfonamide boronic acid inhibitor

Structural highlights 4e3l is a 2 chain structure with sequence from Escherichia coli k-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: , Related: 4e3i, 4e3j, 4e3k, 4e3m, 4e3n, 4e3o Gene: ampA, ampC, b4150, JW4111 (Escherichia coli K-12) Activity: Beta-lactamase, with EC number 3.5.2.6 Resources: FirstGlance, OCA, RCSB, PDBsum Function [AMPC_ECOLI] This protein is a serine beta-lactamase with a substrate specificity for cephalosporins. Publication Abstract from PubMed Fragment-based design was used to guide derivatization of a lead series of beta-lactamase inhibitors that had heretofore resisted optimization for in vivo activity. X-ray structures of fragments overlaid with the lead suggested new, unanticipated functionality and points of attachment. Synthesis of three derivatives improved affinity over 20-fold and improved efficacy in cell culture. Crystal structures were consistent with the fragment-based design, enabling further optimization to a K(i) of 50 pM, a 500-fold improvement that required the synthesis of only six derivatives. One of these, compound 5, was tested in mice. Whereas cefotaxime alone failed to cure mice infected with beta-lactamase-expressing Escherichia coli, 65% were cleared of infection when treated with a cefotaxime:5 combination. Fragment complexes offer a path around design hurdles, even for advanced molecules; the series described here may provide leads to overcome beta-lactamase-based resistance, a key clinical challenge. Fragment-guided design of subnanomolar beta-lactamase inhibitors active in vivo.,Eidam O, Romagnoli C, Dalmasso G, Barelier S, Caselli E, Bonnet R, Shoichet BK, Prati F Proc Natl Acad Sci U S A. 2012 Oct 23;109(43):17448-53. doi:, 10.1073/pnas.1208337109. Epub 2012 Oct 5. PMID:23043117 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-lactamase

spinqualitylabelsall models 4e3l, resolution 1.43Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image