4m9x

From Proteopedia

(Difference between revisions)

Revision as of 10:33, 4 August 2016

Crystal structure of CED-4 bound CED-3 fragment

Structural highlights

4m9x is a 4 chain structure with sequence from Caeel. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	4m9s, 4m9y, 4m9z
Gene:	ced-4, C35D10.9 (CAEEL)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CED4_CAEEL] Isoform a plays a major role in programmed cell death (PCD, apoptosis). Egl-1 binds to and directly inhibits the activity of ced-9, releasing the cell death activator ced-4 from a ced-9/ced-4 containing protein complex and allowing ced-4 to activate the cell-killing caspase ced-3. Isoform b prevents PCD.^[1] ^[2] ^[3] ^[4] ^[5]

Publication Abstract from PubMed

Programmed cell death in Caenorhabditis elegans requires activation of the caspase CED-3, which strictly depends on CED-4. CED-4 forms an octameric apoptosome, which binds the CED-3 zymogen and facilitates its autocatalytic maturation. Despite recent advances, major questions remain unanswered. Importantly, how CED-4 recognizes CED-3 and how such binding facilitates CED-3 activation remain completely unknown. Here we demonstrate that the L2' loop of CED-3 directly binds CED-4 and plays a major role in the formation of an active CED-4-CED-3 holoenzyme. The crystal structure of the CED-4 apoptosome bound to the L2' loop fragment of CED-3, determined at 3.2 A resolution, reveals specific interactions between a stretch of five hydrophobic amino acids from CED-3 and a shallow surface pocket within the hutch of the funnel-shaped CED-4 apoptosome. Structure-guided biochemical analysis confirms the functional importance of the observed CED-4-CED-3 interface. Structural analysis together with published evidence strongly suggest a working model in which two molecules of CED-3 zymogen, through specific recognition, are forced into the hutch of the CED-4 apoptosome, consequently undergoing dimerization and autocatalytic maturation. The mechanism of CED-3 activation represents a major revision of the prevailing model for initiator caspase activation.

Mechanistic insights into CED-4-mediated activation of CED-3.,Huang W, Jiang T, Choi W, Qi S, Pang Y, Hu Q, Xu Y, Gong X, Jeffrey PD, Wang J, Shi Y Genes Dev. 2013 Sep 15;27(18):2039-48. doi: 10.1101/gad.224428.113. PMID:24065769^[6]

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

References

↑ Yuan J, Horvitz HR. The Caenorhabditis elegans cell death gene ced-4 encodes a novel protein and is expressed during the period of extensive programmed cell death. Development. 1992 Oct;116(2):309-20. PMID:1286611
↑ Shaham S, Horvitz HR. An alternatively spliced C. elegans ced-4 RNA encodes a novel cell death inhibitor. Cell. 1996 Jul 26;86(2):201-8. PMID:8706125
↑ Wu D, Wallen HD, Nunez G. Interaction and regulation of subcellular localization of CED-4 by CED-9. Science. 1997 Feb 21;275(5303):1126-9. PMID:9027313
↑ Chen F, Hersh BM, Conradt B, Zhou Z, Riemer D, Gruenbaum Y, Horvitz HR. Translocation of C. elegans CED-4 to nuclear membranes during programmed cell death. Science. 2000 Feb 25;287(5457):1485-9. PMID:10688797
↑ Yan N, Gu L, Kokel D, Chai J, Li W, Han A, Chen L, Xue D, Shi Y. Structural, biochemical, and functional analyses of CED-9 recognition by the proapoptotic proteins EGL-1 and CED-4. Mol Cell. 2004 Sep 24;15(6):999-1006. PMID:15383288 doi:10.1016/j.molcel.2004.08.022
↑ Huang W, Jiang T, Choi W, Qi S, Pang Y, Hu Q, Xu Y, Gong X, Jeffrey PD, Wang J, Shi Y. Mechanistic insights into CED-4-mediated activation of CED-3. Genes Dev. 2013 Sep 15;27(18):2039-48. doi: 10.1101/gad.224428.113. PMID:24065769 doi:http://dx.doi.org/10.1101/gad.224428.113

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4m9x"

@@ Line 1: / Line 1: @@
 ==Crystal structure of CED-4 bound CED-3 fragment==
 <StructureSection load='4m9x' size='340' side='right' caption='[[4m9x]], [[Resolution|resolution]] 3.34&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4m9x]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Xenopus_itombwensis Xenopus itombwensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M9X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4M9X FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4m9x]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Caeel Caeel]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M9X OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4M9X FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m9s|4m9s]], [[4m9y|4m9y]], [[4m9z|4m9z]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ced-4, C35D10.9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=542840 Xenopus itombwensis])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ced-4, C35D10.9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6239 CAEEL])</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=4m9x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m9x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4m9x RCSB], [http://www.ebi.ac.uk/pdbsum/4m9x PDBsum]</span></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=4m9x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m9x OCA], [http://pdbe.org/4m9x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4m9x RCSB], [http://www.ebi.ac.uk/pdbsum/4m9x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4m9x ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4m9x" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 25: / Line 27: @@
 __TOC__
 </StructureSection>
-[[Category: Xenopus itombwensis]]
+[[Category: Caeel]]
 [[Category: Choi, W Y]]
 [[Category: Huang, W J]]

4m9x

From Proteopedia

Revision as of 10:33, 4 August 2016

Crystal structure of CED-4 bound CED-3 fragment

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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