1khq: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
[[Image:1khq.gif|left|200px]] | [[Image:1khq.gif|left|200px]] | ||
'''ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX''' | {{Structure | ||
|PDB= 1khq |SIZE=350|CAPTION= <scene name='initialview01'>1khq</scene>, resolution 1.6Å | |||
|SITE= | |||
|LIGAND= | |||
|ACTIVITY= [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] | |||
|GENE= | |||
}} | |||
'''ORTHORHOMBIC FORM OF PAPAIN/ZLFG-DAM COVALENT COMPLEX''' | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
1KHQ is a [ | 1KHQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Carica_papaya Carica papaya]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KHQ OCA]. | ||
==Reference== | ==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:[http:// | 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:[http://www.ncbi.nlm.nih.gov/pubmed/15357669 15357669] | ||
[[Category: Carica papaya]] | [[Category: Carica papaya]] | ||
[[Category: Papain]] | [[Category: Papain]] | ||
| Line 23: | Line 32: | ||
[[Category: protease inhibitor]] | [[Category: protease inhibitor]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:17:37 2008'' | ||
Revision as of 10:17, 20 March 2008
| |||||||||||||
| 1khq, resolution 1.6Å | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Activity: | Papain, with EC number 3.4.22.2 | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
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 Thu Mar 20 12:17:37 2008
