3j2t
From Proteopedia
(Difference between revisions)
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- | + | ==An improved model of the human apoptosome== | |
- | === | + | <StructureSection load='3j2t' size='340' side='right' caption='[[3j2t]], [[Resolution|resolution]] 9.50Å' scene=''> |
- | + | == Structural highlights == | |
+ | <table><tr><td colspan='2'>[[3j2t]] is a 14 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] and [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. This structure supersedes the now removed PDB entries and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3iyt 3iyt]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3J2T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3J2T 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=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr> | ||
+ | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Apaf-1, APAF1, KIAA0413 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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=3j2t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3j2t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3j2t RCSB], [http://www.ebi.ac.uk/pdbsum/3j2t PDBsum]</span></td></tr> | ||
+ | </table> | ||
+ | <div style="background-color:#fffaf0;"> | ||
+ | == Publication Abstract from PubMed == | ||
+ | Apoptosome assembly is highly regulated in the intrinsic cell death pathway. To better understand this step, we created an improved model of the human apoptosome using a crystal structure of full length Apaf-1 and a single particle, electron density map at approximately 9.5 A resolution. The apoptosome model includes N-terminal domains of Apaf-1, cognate beta-propellers, and cytochrome c. A direct comparison of Apaf-1 in the apoptosome and as a monomer reveals conformational changes that occur during the first two steps of assembly. This includes an induced-fit mechanism for cytochrome c binding to regulatory beta-propellers, which is dependent on shape and charge complementarity, and a large rotation of the nucleotide binding module during nucleotide exchange. These linked conformational changes create an extended Apaf-1 monomer and drive apoptosome assembly. Moreover, the N-terminal CARD in the inactive Apaf-1 monomer is not shielded from other proteins by beta-propellers. Hence, the Apaf-1 CARD may be free to interact with a procaspase-9 CARD either before or during apoptosome assembly. Irrespective of the timing, the end product of assembly is a holo-apoptosome with an acentric CARD-CARD disk and tethered pc-9 catalytic domains. Subsequent activation of pc-9 leads to a proteolytic cascade and cell death. | ||
- | + | Changes in apaf-1 conformation that drive apoptosome assembly.,Yuan S, Topf M, Reubold TF, Eschenburg S, Akey CW Biochemistry. 2013 Apr 2;52(13):2319-27. doi: 10.1021/bi301721g. Epub 2013 Mar, 22. PMID:23521171<ref>PMID:23521171</ref> | |
- | + | ||
- | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
- | + | </div> | |
- | == | + | ==See Also== |
- | + | *[[Cytochrome c|Cytochrome c]] | |
+ | == References == | ||
+ | <references/> | ||
+ | __TOC__ | ||
+ | </StructureSection> | ||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
- | [[Category: Akey, C W | + | [[Category: Akey, C W]] |
- | [[Category: Topf, M | + | [[Category: Topf, M]] |
- | [[Category: Yuan, S | + | [[Category: Yuan, S]] |
[[Category: Apaf-1]] | [[Category: Apaf-1]] | ||
[[Category: Apoptosis]] | [[Category: Apoptosis]] | ||
[[Category: Apoptosis protease activating factor-1]] | [[Category: Apoptosis protease activating factor-1]] | ||
[[Category: Cytochrome c]] | [[Category: Cytochrome c]] |
Revision as of 15:01, 18 December 2014
An improved model of the human apoptosome
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