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1khq

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[[Image:1khq.gif|left|200px]]
[[Image:1khq.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 1khq |SIZE=350|CAPTION= <scene name='initialview01'>1khq</scene>, resolution 1.6&Aring;
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The line below this paragraph, containing "STRUCTURE_1khq", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=GLM:1-AMINO-PROPAN-2-ONE'>GLM</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Papain Papain], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.2 3.4.22.2] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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|DOMAIN=
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{{STRUCTURE_1khq| PDB=1khq | SCENE= }}
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|RELATEDENTRY=[[1pad|1PAD]], [[5pad|5PAD]], [[6pad|6PAD]], [[9pap|9PAP]], [[1ppn|1PPN]], [[2pad|2PAD]], [[1pe6|1PE6]], [[1pip|1PIP]], [[1ppp|1PPP]], [[1ppd|1PPD]], [[1pop|1POP]], [[1stf|1STF]], [[1cvz|1CVZ]], [[1khp|1KHP]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1khq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1khq OCA], [http://www.ebi.ac.uk/pdbsum/1khq PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1khq RCSB]</span>
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}}
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'''ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX'''
'''ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX'''
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[[Category: Jaskolski, M.]]
[[Category: Jaskolski, M.]]
[[Category: Kozak, M.]]
[[Category: Kozak, M.]]
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[[Category: diazomethylketone inhibitor]]
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[[Category: Diazomethylketone inhibitor]]
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[[Category: irreversible inhibitor]]
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[[Category: Irreversible inhibitor]]
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[[Category: protease inhibitor]]
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[[Category: Protease inhibitor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 22:45:45 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:48:45 2008''
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Revision as of 19:45, 2 May 2008

Image:1khq.gif

Template:STRUCTURE 1khq

ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX


Overview

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.

About this Structure

1KHQ is a Single protein structure of sequence from Carica papaya. Full crystallographic information is available from OCA.

Reference

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 Page seeded by OCA on Fri May 2 22:45:45 2008

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