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2p2c

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[[Image:2p2c.gif|left|200px]]<br /><applet load="2p2c" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2p2c, resolution 3.24&Aring;" />
 
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'''Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)'''<br />
 
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==Overview==
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==Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)==
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Specific and potent caspase inhibitors are indispensable for the, dissection of the intricate pathways leading to apoptosis. We selected a, designed ankyrin repeat protein (DARPin) from a combinatorial library that, inhibits caspase-2 in vitro with a subnanomolar inhibition constant and, in contrast to the peptidic caspase inhibitors, with very high specificity, for this particular caspase. The crystal structure of this inhibitor, (AR_F8) in complex with caspase-2 reveals the molecular basis for the, specificity and, together with kinetic analyses, the allosteric mechanism, of inhibition. The structure also shows a conformation of the active site, that can be exploited for the design of inhibitory compounds. AR_F8 is a, specific inhibitor of an initiator caspase and has the potential to help, identify the function of caspase-2 in the complex biological apoptotic, signaling network.
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<StructureSection load='2p2c' size='340' side='right'caption='[[2p2c]], [[Resolution|resolution]] 3.24&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2p2c]] is a 18 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P2C OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2P2C FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.24&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2p2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2p2c OCA], [https://pdbe.org/2p2c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2p2c RCSB], [https://www.ebi.ac.uk/pdbsum/2p2c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2p2c ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CASP2_HUMAN CASP2_HUMAN] Involved in the activation cascade of caspases responsible for apoptosis execution. Might function by either activating some proteins required for cell death or inactivating proteins necessary for cell survival.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/p2/2p2c_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2p2c ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Specific and potent caspase inhibitors are indispensable for the dissection of the intricate pathways leading to apoptosis. We selected a designed ankyrin repeat protein (DARPin) from a combinatorial library that inhibits caspase-2 in vitro with a subnanomolar inhibition constant and, in contrast to the peptidic caspase inhibitors, with very high specificity for this particular caspase. The crystal structure of this inhibitor (AR_F8) in complex with caspase-2 reveals the molecular basis for the specificity and, together with kinetic analyses, the allosteric mechanism of inhibition. The structure also shows a conformation of the active site that can be exploited for the design of inhibitory compounds. AR_F8 is a specific inhibitor of an initiator caspase and has the potential to help identify the function of caspase-2 in the complex biological apoptotic signaling network.
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==About this Structure==
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Inhibition of caspase-2 by a designed ankyrin repeat protein: specificity, structure, and inhibition mechanism.,Schweizer A, Roschitzki-Voser H, Amstutz P, Briand C, Gulotti-Georgieva M, Prenosil E, Binz HK, Capitani G, Baici A, Pluckthun A, Grutter MG Structure. 2007 May;15(5):625-36. PMID:17502107<ref>PMID:17502107</ref>
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2P2C is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences 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=2P2C OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Inhibition of Caspase-2 by a Designed Ankyrin Repeat Protein: Specificity, Structure, and Inhibition Mechanism., Schweizer A, Roschitzki-Voser H, Amstutz P, Briand C, Gulotti-Georgieva M, Prenosil E, Binz HK, Capitani G, Baici A, Pluckthun A, Grutter MG, Structure. 2007 May 16;15(5):625-636. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17502107 17502107]
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</div>
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[[Category: Homo sapiens]]
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<div class="pdbe-citations 2p2c" style="background-color:#fffaf0;"></div>
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[[Category: Protein complex]]
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[[Category: Briand, C.]]
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[[Category: Capitani, G.]]
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[[Category: Gruetter, M.G.]]
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[[Category: Voser, HRoschitzki.]]
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[[Category: apoptosis]]
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[[Category: caspase]]
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[[Category: caspase-2]]
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[[Category: designed ankyrin repeat proteins]]
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[[Category: inhibition]]
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[[Category: protein design]]
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[[Category: protein libraries]]
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[[Category: ribosome display]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 15:12:57 2008''
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==See Also==
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*[[Caspase 3D structures|Caspase 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Homo sapiens]]
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[[Category: Large Structures]]
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[[Category: Briand C]]
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[[Category: Capitani G]]
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[[Category: Gruetter MG]]
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[[Category: Roschitzki Voser H]]

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Inhibition of caspase-2 by a designed ankyrin repeat protein (DARPin)

PDB ID 2p2c

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