1khq

ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX

spinqualitylabelsall models 1khq, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1khq is a 2 chain structure with sequence from Carica papaya. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: 0HQ, PHQ Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PAPA1_CARPA 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 three-dimensional structure of two polymorphs of a ZLFG-CH2-papain covalent complex has been determined by X-ray crystallography. The structures indicate that: (i) the methylene carbon atom of the inhibitor is covalently bound to the Sgamma atom of Cys25 of papain; (ii) the hydrophobic S2 pocket formed by Pro68, Val133, Val157, and Asp158 is occupied by the inhibitor's phenylalanyl P2 side chain; (iii) extensive hydrogen bonding and hydrophobic interactions are responsible for the interaction of the inhibitor with the enzyme. Comparison with similar structures suggests that in covalent complexes preservation of main chain-main chain interactions between the enzyme and the inhibitor may have higher priority than the P-S interactions. Two polymorphs of a covalent complex between papain and a diazomethylketone inhibitor.,Janowski R, Kozak M, Jankowska E, Grzonka Z, Jaskolski M J Pept Res. 2004 Oct;64(4):141-50. PMID:15357669 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Papain

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