3gy5 | pdb_00003gy5

A comparative study on the inhibition of bovine beta-trypsin by bis-benzamidines diminazene and pentamidine by X-ray crystallography and ITC

spinqualitylabelsall models 3gy5, resolution 1.57Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3gy5 is a 1 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.57Å Ligands: BRN, CA, EDO, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRY1_BOVIN 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 Bovine trypsin is a model system for the serine protease class of enzymes, which is an important target for contemporary medicinal chemistry. Some structural and thermodynamic reports are available on its interaction with benzamidine-based compounds but no structural information is available so far on its binding modes to the active principles of the trypanocidal drugs Pentacarinate (pentamidine) and Berenil (diminazene). The crystallographic structures of bovine beta-trypsin in complex with the ligands were determined to a resolution of 1.57 A (diminazene) and 1.70 A (diminazene and pentamidine). The second benzamidine moieties in these inhibitors are bound to the enzyme in different hot spots and only few hydrogen bonds mediate these interactions. Thermodynamic parameters for the association of pentamidine with beta-trypsin reveal that this inhibitor has about 1.3-fold lower affinity than diminazene. Moreover its binding mode resembles other benzamidine-based compounds that assess the aryl binding pocket of the enzyme; however, with almost 2.5-fold higher affinity. This is the first structural evidence of the binding of Berenil and Pentacarinate active principles trypanocidal drugs to serine proteases. Structural binding evidence of the trypanocidal drugs Berenil and Pentacarinate active principles to a serine protease model.,Perilo CS, Pereira MT, Santoro MM, Nagem RA Int J Biol Macromol. 2010 Jun 1;46(5):502-11. Epub 2010 Mar 29. PMID:20356563 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Trypsin 3D structures

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