2jet | pdb_00002jet

Crystal structure of a trypsin-like mutant (S189D , A226G) chymotrypsin.

spinqualitylabelsall models 2jet, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2jet is a 3 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1kdq Activity: Chymotrypsin, with EC number 3.4.21.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 crystal structure of the S189D+A226G rat chymotrypsin-B mutant has been determined at 2.2 A resolution. This mutant is the most trypsin-like mutant so far in the line of chymotrypsin-to-trypsin conversions, aiming for a more complete understanding of the structural basis of substrate specificity in pancreatic serine proteases. A226G caused significant rearrangements relative to S189D chymotrypsin, allowing an internal conformation of Asp189 which is close to that in trypsin. Serious distortions remain, however, in the activation domain, including zymogen-like features. The pH-profile of activity suggests that the conformation of the S1-site of the mutant is influenced also by the P1 residue of the substrate. The Crystal Structure of a Trypsin-like Mutant Chymotrypsin: The Role of Position 226 in the Activity and Specificity of S189D Chymotrypsin.,Jelinek B, Katona G, Fodor K, Venekei I, Graf L Protein J. 2007 Sep 6;. PMID:17805946 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chymotrypsin

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