3byx

Lactobacillus CASEI Thymidylate Synthase Ternary Complex with DUMP and the Phtalimidic Derivative C00 in Multiple Binding Modes

spinqualitylabelsall models 3byx, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3byx is a 1 chain structure with sequence from Lactobacillus casei. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: C00, UMP Related: 1lce, 1tsl, 3bnz, 3bz0, 3c06, 3c0a Activity: Thymidylate synthase, with EC number 2.1.1.45 Resources: FirstGlance, OCA, RCSB, PDBsum Function [TYSY_LACCA] Provides the sole de novo source of dTMP for DNA biosynthesis. 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 To identify specific bacterial thymidylate synthase (TS) inhibitors, we exploited phenolphthalein (PTH), which inhibits both bacterial and human enzymes. The X-ray crystal structure of Lactobacillus casei TS (LcTS) that binds PTH showed multiple binding modes of the inhibitor, which prevented a classical structure-based drug design approach. To overcome this issue, we synthesized two phthalimidic libraries that were tested against TS enzymes and then we performed X-ray crystallographic screening of the active compounds. Compounds 6A, 8A, and 12A showed 40-fold higher affinity for bacterial TS than human TS. The X-ray crystallographic screening characterized the binding mode of six inhibitors in complexes with LcTS. Of these, 20A, 23A, and 24A showed a common unique binding mode, whereas 8A showed a different, unique binding mode. A comparative analysis of the LcTS X-ray complexes that were obtained with the pathogenic TS enabled the selection of compounds 8A and 23A as specific compounds and starting points to be exploited for the specific inhibition of pathogen enzymes. Identification of the binding modes of N-phenylphthalimides inhibiting bacterial thymidylate synthase through X-ray crystallography screening.,Mangani S, Cancian L, Leone R, Pozzi C, Lazzari S, Luciani R, Ferrari S, Costi MP J Med Chem. 2011 Aug 11;54(15):5454-67. Epub 2011 Jul 12. PMID:21696158 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Thymidylate synthase

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