This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1lcy

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 09:35, 11 September 2015

Crystal Structure of the Mitochondrial Serine Protease HtrA2

Structural highlights

1lcy is a 1 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Disease

[HTRA2_HUMAN] Defects in HTRA2 are the cause of Parkinson disease type 13 (PARK13) [MIM:610297]. A complex neurodegenerative disorder characterized by bradykinesia, resting tremor, muscular rigidity and postural instability, as well as by a clinically significant response to treatment with levodopa. The pathology involves the loss of dopaminergic neurons in the substantia nigra and the presence of Lewy bodies (intraneuronal accumulations of aggregated proteins), in surviving neurons in various areas of the brain.^[1] ^[2]

Function

[HTRA2_HUMAN] Serine protease that shows proteolytic activity against a non-specific substrate beta-casein. Promotes or induces cell death either by direct binding to and inhibition of BIRC proteins (also called inhibitor of apoptosis proteins, IAPs), leading to an increase in caspase activity, or by a BIRC inhibition-independent, caspase-independent and serine protease activity-dependent mechanism. Cleaves THAP5 and promotes its degradation during apoptosis. Isoform 2 seems to be proteolytically inactive.^[3] ^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

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.

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^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Strauss KM, Martins LM, Plun-Favreau H, Marx FP, Kautzmann S, Berg D, Gasser T, Wszolek Z, Muller T, Bornemann A, Wolburg H, Downward J, Riess O, Schulz JB, Kruger R. Loss of function mutations in the gene encoding Omi/HtrA2 in Parkinson's disease. Hum Mol Genet. 2005 Aug 1;14(15):2099-111. Epub 2005 Jun 16. PMID:15961413 doi:10.1093/hmg/ddi215
↑ Bogaerts V, Nuytemans K, Reumers J, Pals P, Engelborghs S, Pickut B, Corsmit E, Peeters K, Schymkowitz J, De Deyn PP, Cras P, Rousseau F, Theuns J, Van Broeckhoven C. Genetic variability in the mitochondrial serine protease HTRA2 contributes to risk for Parkinson disease. Hum Mutat. 2008 Jun;29(6):832-40. PMID:18401856 doi:10.1002/humu.20713
↑ Bartke T, Pohl C, Pyrowolakis G, Jentsch S. Dual role of BRUCE as an antiapoptotic IAP and a chimeric E2/E3 ubiquitin ligase. Mol Cell. 2004 Jun 18;14(6):801-11. PMID:15200957 doi:10.1016/j.molcel.2004.05.018
↑ Balakrishnan MP, Cilenti L, Mashak Z, Popat P, Alnemri ES, Zervos AS. THAP5 is a human cardiac-specific inhibitor of cell cycle that is cleaved by the proapoptotic Omi/HtrA2 protease during cell death. Am J Physiol Heart Circ Physiol. 2009 Aug;297(2):H643-53. doi:, 10.1152/ajpheart.00234.2009. Epub 2009 Jun 5. PMID:19502560 doi:10.1152/ajpheart.00234.2009
↑ Li W, Srinivasula SM, Chai J, Li P, Wu JW, Zhang Z, Alnemri ES, Shi Y. Structural insights into the pro-apoptotic function of mitochondrial serine protease HtrA2/Omi. Nat Struct Biol. 2002 Jun;9(6):436-41. PMID:11967569 doi:http://dx.doi.org/10.1038/nsb795

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1lcy"

@@ Line 2: / Line 2: @@
 <StructureSection load='1lcy' size='340' side='right' caption='[[1lcy]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1lcy]] is a 1 chain structure with 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=1LCY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LCY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1lcy]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LCY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LCY FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><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.rcsb.org/pdb/explore.do?structureId=1lcy RCSB], [http://www.ebi.ac.uk/pdbsum/1lcy PDBsum]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><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://pdbe.org/1lcy PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1lcy RCSB], [http://www.ebi.ac.uk/pdbsum/1lcy PDBsum]</span></td></tr>
 </table>
 == Disease ==
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1lcy" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Alnemri, E S]]
 [[Category: Chai, J]]

1lcy

From Proteopedia

Revision as of 09:35, 11 September 2015

Crystal Structure of the Mitochondrial Serine Protease HtrA2

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox