1ibc
From Proteopedia
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| - | [[Image:1ibc.gif|left|200px]] | + | [[Image:1ibc.gif|left|200px]] |
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| - | '''CRYSTAL STRUCTURE OF INHIBITED INTERLEUKIN-1BETA CONVERTING ENZYME''' | + | {{Structure |
| + | |PDB= 1ibc |SIZE=350|CAPTION= <scene name='initialview01'>1ibc</scene>, resolution 2.73Å | ||
| + | |SITE= <scene name='pdbsite=S1:Inhibitor+Binding+Sub-Site+S1'>S1</scene>, <scene name='pdbsite=S2:Inhibitor+Binding+Sub-Site+S2'>S2</scene>, <scene name='pdbsite=S3:Inhibitor+Binding+Sub-Site+S3'>S3</scene> and <scene name='pdbsite=S4:Inhibitor+Binding+Sub-Site+S4'>S4</scene> | ||
| + | |LIGAND= <scene name='pdbligand=ACE:ACETYL GROUP'>ACE</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Caspase-1 Caspase-1], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.36 3.4.22.36] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''CRYSTAL STRUCTURE OF INHIBITED INTERLEUKIN-1BETA CONVERTING ENZYME''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1IBC is a [ | + | 1IBC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IBC OCA]. |
==Reference== | ==Reference== | ||
| - | A combinatorial approach for determining protease specificities: application to interleukin-1beta converting enzyme (ICE)., Rano TA, Timkey T, Peterson EP, Rotonda J, Nicholson DW, Becker JW, Chapman KT, Thornberry NA, Chem Biol. 1997 Feb;4(2):149-55. PMID:[http:// | + | A combinatorial approach for determining protease specificities: application to interleukin-1beta converting enzyme (ICE)., Rano TA, Timkey T, Peterson EP, Rotonda J, Nicholson DW, Becker JW, Chapman KT, Thornberry NA, Chem Biol. 1997 Feb;4(2):149-55. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9190289 9190289] |
[[Category: Caspase-1]] | [[Category: Caspase-1]] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
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[[Category: protease]] | [[Category: protease]] | ||
| - | ''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 11:48:02 2008'' |
Revision as of 09:48, 20 March 2008
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| , resolution 2.73Å | |||||||
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| Sites: | , , and | ||||||
| Ligands: | |||||||
| Activity: | Caspase-1, with EC number 3.4.22.36 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF INHIBITED INTERLEUKIN-1BETA CONVERTING ENZYME
Overview
BACKGROUND: Interleukin-1beta converting enzyme (ICE/caspase-1) is the protease responsible for interleukin-1beta (IL-1beta) production in monocytes. It was the first member of a new cysteine protease family to be identified. Members of this family have functions in both inflammation and apoptosis. RESULTS: A novel method for identifying protease specificity, employing a positional-scanning substrate library, was used to determine the amino-acid preferences of ICE. Using this method, the complete specificity of a protease can be mapped in the time required to perform one assay. The results indicate that the optimal tetrapeptide recognition sequence for ICE is WEHD, not YVAD, as previously believed, and this led to the synthesis of an unusually potent aldehyde inhibitor, Ac-WEHD-CHO (Ki = 56 pM). The structural basis for this potent inhibition was determined by X-ray crystallography. CONCLUSIONS: The results presented in this study establish a positional-scanning library as a powerful tool for rapidly and accurately assessing protease specificity. The preferred sequence for ICE (WEHD) differs significantly from that found in human pro-interleukin-1beta (YVHD), which suggests that this protease may have additional endogenous substrates, consistent with evidence linking it to apoptosis and IL-1alpha production.
About this Structure
1IBC is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
A combinatorial approach for determining protease specificities: application to interleukin-1beta converting enzyme (ICE)., Rano TA, Timkey T, Peterson EP, Rotonda J, Nicholson DW, Becker JW, Chapman KT, Thornberry NA, Chem Biol. 1997 Feb;4(2):149-55. PMID:9190289
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