1lcy

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[[Image:1lcy.gif|left|200px]]
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{{Structure
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lcy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lcy OCA], [http://www.ebi.ac.uk/pdbsum/1lcy PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1lcy RCSB]</span>
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'''Crystal Structure of the Mitochondrial Serine Protease HtrA2'''
'''Crystal Structure of the Mitochondrial Serine Protease HtrA2'''
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[[Category: Wu, J W.]]
[[Category: Wu, J W.]]
[[Category: Zhang, Z.]]
[[Category: Zhang, Z.]]
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[[Category: apoptosis]]
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[[Category: Apoptosis]]
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[[Category: caspase activation]]
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[[Category: Caspase activation]]
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[[Category: iap-binding]]
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[[Category: Iap-binding]]
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[[Category: pdz domain]]
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[[Category: Pdz domain]]
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[[Category: serine protease]]
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[[Category: Serine protease]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:47:59 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:01:13 2008''
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Revision as of 20:48, 2 May 2008

Template:STRUCTURE 1lcy

Crystal Structure of the Mitochondrial Serine Protease HtrA2


Overview

HtrA2/Omi, a mitochondrial serine protease in mammals, is important in programmed cell death. However, the underlining mechanism of HtrA2/Omi-mediated apoptosis remains unclear. Analogous to the bacterial homolog HtrA (DegP), the mature HtrA2 protein contains a central serine protease domain and a C-terminal PDZ domain. The 2.0 A crystal structure of HtrA2/Omi reveals the formation of a pyramid-shaped homotrimer mediated exclusively by the serine protease domains. The peptide-binding pocket of the PDZ domain is buried in the intimate interface between the PDZ and the protease domains. Mutational analysis reveals that the monomeric HtrA2/Omi mutants are unable to induce cell death and are deficient in protease activity. The PDZ domain modulates HtrA2/Omi-mediated cell death activity by regulating its serine protease activity. These structural and biochemical observations provide an important framework for deciphering the mechanisms of HtrA2/Omi-mediated apoptosis.

About this Structure

1LCY is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structural insights into the pro-apoptotic function of mitochondrial serine protease HtrA2/Omi., Li W, Srinivasula SM, Chai J, Li P, Wu JW, Zhang Z, Alnemri ES, Shi Y, Nat Struct Biol. 2002 Jun;9(6):436-41. PMID:11967569 Page seeded by OCA on Fri May 2 23:47:59 2008

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