1se0

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[[Image:1se0.gif|left|200px]]
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{{Seed}}
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[[Image:1se0.png|left|200px]]
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{{STRUCTURE_1se0| PDB=1se0 | SCENE= }}
{{STRUCTURE_1se0| PDB=1se0 | SCENE= }}
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'''Crystal structure of DIAP1 BIR1 bound to a Grim peptide'''
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===Crystal structure of DIAP1 BIR1 bound to a Grim peptide===
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==Overview==
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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.
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The line below this paragraph, {{ABSTRACT_PUBMED_15107838}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 15107838 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15107838}}
==About this Structure==
==About this Structure==
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[[Category: Grim]]
[[Category: Grim]]
[[Category: Iap]]
[[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 Tue Jul 29 00:19:11 2008''

Revision as of 21:19, 28 July 2008

Image:1se0.png

Template:STRUCTURE 1se0

Crystal structure of DIAP1 BIR1 bound to a Grim peptide

Template:ABSTRACT PUBMED 15107838

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

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