1k86

<StructureSection load='1k86' size='340' side='right' caption='[[1k86]], [[Resolution|resolution]] 2.60&Aring;' scene=''>

<table><tr><td colspan='2'>[[1k86]] is a 2 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=1K86 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1K86 FirstGlance]. <br>

</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1i51|1i51]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">caspase-7 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=1k86 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k86 OCA], [http://pdbe.org/1k86 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1k86 RCSB], [http://www.ebi.ac.uk/pdbsum/1k86 PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/CASP7_HUMAN CASP7_HUMAN]] Involved in the activation cascade of caspases responsible for apoptosis execution. Cleaves and activates sterol regulatory element binding proteins (SREBPs). Proteolytically cleaves poly(ADP-ribose) polymerase (PARP) at a '216-Asp-|-Gly-217' bond. Overexpression promotes programmed cell death.

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/k8/1k86_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

Apoptosis is primarily executed by active caspases, which are derived from the inactive procaspase zymogens through proteolytic cleavage. Here we report the crystal structures of a caspase zymogen, procaspase-7, and an active caspase-7 without any bound inhibitors. Compared to the inhibitor-bound caspase-7, procaspase-7 zymogen exhibits significant structural differences surrounding the catalytic cleft, which precludes the formation of a productive conformation. Proteolytic cleavage between the large and small subunits allows rearrangement of essential loops in the active site, priming active caspase-7 for inhibitor/substrate binding. Strikingly, binding by inhibitors causes a 180 degrees flipping of the N terminus in the small subunit, which interacts with and stabilizes the catalytic cleft. These analyses reveal the structural mechanisms of caspase activation and demonstrate that the inhibitor/substrate binding is a process of induced fit.

Crystal structure of a procaspase-7 zymogen: mechanisms of activation and substrate binding.,Chai J, Wu Q, Shiozaki E, Srinivasula SM, Alnemri ES, Shi Y Cell. 2001 Nov 2;107(3):399-407. PMID:11701129<ref>PMID:11701129</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1k86" style="background-color:#fffaf0;"></div>

*[[Caspase|Caspase]]

[[Category: Human]]

[[Category: Alnemri, E S]]

[[Category: Chai, J]]

[[Category: Shi, Y]]

[[Category: Shiozaki, E]]

[[Category: Srinivasa, S M]]

[[Category: Wu, Q]]

[[Category: Zymogen]]