2ctc

THE HIGH RESOLUTION CRYSTAL STRUCTURE OF THE COMPLEX BETWEEN CARBOXYPEPTIDASE A AND L-PHENYL LACTATE

spinqualitylabelsall models 2ctc, resolution 1.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2ctc 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 1.4Å Ligands: HFA, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CBPA1_BOVIN Carboxypeptidase that catalyzes the release of a C-terminal amino acid, but has little or no action with -Asp, -Glu, -Arg, -Lys or -Pro (By similarity). 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 The X-ray structures of native carboxypeptidase A and of the enzyme-inhibitor complex with L-phenyl lactate have been refined at 1.54 and 1.45 A resolution to R factors of 0.151 and 0.161, respectively. Crystals of the complex were isomorphous with the native crystals (space group P2(1), a = 51.60, b = 60.27, c = 47.25 A, beta = 97.27 degrees ). The high-resolution electron density allowed correction of many side-chain positions in the classical carboxypeptidase A model. This reflects the advantages of the high-quality complete synchrotron data collected with an imaging plate detector. The conformational changes in the active centre of the enzyme upon binding of the inhibitor are restricted to only two residues, Tyr248 and Arg145. L-Phenyl lactate is bound in the S1' pocket and forms hydrogen bonds to Arg145, Glu270 and to the zinc-bound water molecule. The present structure provides an explanation for the higher stability of the complexes with the products of esterolysis in comparison with those of amidolysis. This is consistent with the finding that product release is rate limiting for esters but not for peptides. High-resolution structure of the complex between carboxypeptidase A and L-phenyl lactate.,Teplyakov A, Wilson KS, Orioli P, Mangani S Acta Crystallogr D Biol Crystallogr. 1993 Nov 1;49(Pt 6):534-40. PMID:15299490 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Carboxypeptidase 3D structures

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