1se0

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[[Image:1se0.gif|left|200px]]
[[Image:1se0.gif|left|200px]]
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{{Structure
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|PDB= 1se0 |SIZE=350|CAPTION= <scene name='initialview01'>1se0</scene>, resolution 1.75&Aring;
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The line below this paragraph, containing "STRUCTURE_1se0", creates the "Structure Box" on the page.
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|SITE=
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|LIGAND= <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=
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|GENE= IAP1, TH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=7227 Drosophila melanogaster])
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|DOMAIN=
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{{STRUCTURE_1se0| PDB=1se0 | SCENE= }}
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|RELATEDENTRY=[[1sdz|1SDZ]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1se0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1se0 OCA], [http://www.ebi.ac.uk/pdbsum/1se0 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1se0 RCSB]</span>
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'''Crystal structure of DIAP1 BIR1 bound to a Grim peptide'''
'''Crystal structure of DIAP1 BIR1 bound to a Grim peptide'''
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[[Category: Wu, J W.]]
[[Category: Wu, J W.]]
[[Category: Yan, N.]]
[[Category: Yan, N.]]
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[[Category: apoptosis]]
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[[Category: Apoptosis]]
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[[Category: bir]]
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[[Category: Bir]]
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[[Category: caspase]]
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[[Category: Caspase]]
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[[Category: grim]]
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[[Category: Grim]]
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[[Category: iap]]
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[[Category: Iap]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 08:35:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:40:47 2008''
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Revision as of 05:35, 3 May 2008

Image:1se0.gif

Template:STRUCTURE 1se0

Crystal structure of DIAP1 BIR1 bound to a Grim peptide


Overview

The Drosophila melanogaster inhibitor of apoptosis protein DIAP1 suppresses apoptosis in part through inhibition of the effector caspase DrICE. The pro-death proteins Reaper, Hid and Grim (RHG) induce apoptosis by antagonizing DIAP1 function. However, the underlying molecular mechanisms remain unknown. Here we demonstrate that DIAP1 directly inhibits the catalytic activity of DrICE through its BIR1 domain and this inhibition is countered effectively by the RHG proteins. Inhibition of DrICE by DIAP1 occurs only after the cleavage of its N-terminal 20 amino acids and involves a conserved surface groove on BIR1. Crystal structures of BIR1 bound to the RHG peptides show that the RHG proteins use their N-terminal IAP-binding motifs to bind to the same surface groove, hence relieving DIAP1-mediated inhibition of DrICE. These studies define novel molecular mechanisms for the inhibition and activation of a representative D. melanogaster effector caspase.

About this Structure

1SE0 is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.

Reference

Molecular mechanisms of DrICE inhibition by DIAP1 and removal of inhibition by Reaper, Hid and Grim., Yan N, Wu JW, Chai J, Li W, Shi Y, Nat Struct Mol Biol. 2004 May;11(5):420-8. Epub 2004 Apr 25. PMID:15107838 Page seeded by OCA on Sat May 3 08:35:38 2008

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