1rn7
From Proteopedia
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1roa|1ROA]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1rn7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rn7 OCA], [http://www.ebi.ac.uk/pdbsum/1rn7 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1rn7 RCSB]</span> | ||
}} | }} | ||
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[[Category: inhibitor of cysteine peptidase]] | [[Category: inhibitor of cysteine peptidase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:30:23 2008'' |
Revision as of 20:30, 30 March 2008
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| , resolution 2.50Å | |||||||
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| Related: | 1ROA
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of human cystatin D
Overview
Cystatins are natural inhibitors of papain-like (family C1) and legumain-related (family C13) cysteine peptidases. Cystatin D is a type 2 cystatin, a secreted inhibitor found in human saliva and tear fluid. Compared with its homologues, cystatin D presents an unusual inhibition profile with a preferential inhibition cathepsin S > cathepsin H > cathepsin L and no inhibition of cathepsin B or pig legumain. To elucidate the structural reasons for this specificity, we have crystallized recombinant human Arg(26)-cystatin D and solved its structures at room temperature and at cryo conditions to 2.5- and 1.8-A resolution, respectively. Human cystatin D presents the typical cystatin fold, with a five-stranded anti-parallel beta-sheet wrapped around a five-turn alpha-helix. The structures reveal differences in the peptidase-interacting regions when compared with other cystatins, providing plausible explanations for the restricted inhibitory specificity of cystatin D for some papain-like peptidases and its lack of reactivity toward legumain-related enzymes.
About this Structure
1RN7 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of human cystatin D, a cysteine peptidase inhibitor with restricted inhibition profile., Alvarez-Fernandez M, Liang YH, Abrahamson M, Su XD, J Biol Chem. 2005 May 6;280(18):18221-8. Epub 2005 Feb 23. PMID:15728581
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