|
|
(One intermediate revision by the same user not shown) |
Line 3: |
Line 3: |
| <StructureSection load='1df0' size='340' side='right'caption='[[1df0]], [[Resolution|resolution]] 2.60Å' scene=''> | | <StructureSection load='1df0' size='340' side='right'caption='[[1df0]], [[Resolution|resolution]] 2.60Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[1df0]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DF0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DF0 FirstGlance]. <br> | | <table><tr><td colspan='2'>[[1df0]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DF0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DF0 FirstGlance]. <br> |
| </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1aj5|1aj5]], [[1alv|1alv]], [[1alw|1alw]], [[1dvi|1dvi]]</td></tr> | | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6Å</td></tr> |
| <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Calpain-2 Calpain-2], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.53 3.4.22.53] </span></td></tr>
| | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1df0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1df0 OCA], [https://pdbe.org/1df0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1df0 RCSB], [https://www.ebi.ac.uk/pdbsum/1df0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1df0 ProSAT]</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=1df0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1df0 OCA], [http://pdbe.org/1df0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1df0 RCSB], [http://www.ebi.ac.uk/pdbsum/1df0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1df0 ProSAT]</span></td></tr> | |
| </table> | | </table> |
| == Function == | | == Function == |
| [[http://www.uniprot.org/uniprot/CAN2_RAT CAN2_RAT]] Calcium-regulated non-lysosomal thiol-protease which catalyze limited proteolysis of substrates involved in cytoskeletal remodeling and signal transduction. [[http://www.uniprot.org/uniprot/CPNS1_RAT CPNS1_RAT]] Regulatory subunit of the calcium-regulated non-lysosomal thiol-protease which catalyzes limited proteolysis of substrates involved in cytoskeletal remodeling and signal transduction. | | [https://www.uniprot.org/uniprot/CAN2_RAT CAN2_RAT] Calcium-regulated non-lysosomal thiol-protease which catalyze limited proteolysis of substrates involved in cytoskeletal remodeling and signal transduction. |
| == Evolutionary Conservation == | | == Evolutionary Conservation == |
| [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
Line 20: |
Line 19: |
| </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=1df0 ConSurf]. | | </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=1df0 ConSurf]. |
| <div style="clear:both"></div> | | <div style="clear:both"></div> |
| <div style="background-color:#fffaf0;">
| |
| == Publication Abstract from PubMed ==
| |
| The combination of thiol protease activity and calmodulin-like EF-hands is a feature unique to the calpains. The regulatory mechanisms governing calpain activity are complex, and the nature of the Ca(2+)-induced switch between inactive and active forms has remained elusive in the absence of structural information. We describe here the 2.6 A crystal structure of m-calpain in the Ca(2+)-free form, which illustrates the structural basis for the inactivity of calpain in the absence of Ca(2+). It also reveals an unusual thiol protease fold, which is associated with Ca(2+)-binding domains through heterodimerization and a C(2)-like beta-sandwich domain. Strikingly, the structure shows that the catalytic triad is not assembled, indicating that Ca(2+)-binding must induce conformational changes that re-orient the protease domains to form a functional active site. The alpha-helical N-terminal anchor of the catalytic subunit does not occupy the active site but inhibits its assembly and regulates Ca(2+)-sensitivity through association with the regulatory subunit. This Ca(2+)-dependent activation mechanism is clearly distinct from those of classical proteases.
| |
|
| |
| Crystal structure of calpain reveals the structural basis for Ca(2+)-dependent protease activity and a novel mode of enzyme activation.,Hosfield CM, Elce JS, Davies PL, Jia Z EMBO J. 1999 Dec 15;18(24):6880-9. PMID:10601010<ref>PMID:10601010</ref>
| |
|
| |
| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| |
| </div>
| |
| <div class="pdbe-citations 1df0" style="background-color:#fffaf0;"></div>
| |
|
| |
|
| ==See Also== | | ==See Also== |
| *[[Calpain 3D structures|Calpain 3D structures]] | | *[[Calpain 3D structures|Calpain 3D structures]] |
| == References ==
| |
| <references/>
| |
| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
| [[Category: Buffalo rat]]
| |
| [[Category: Calpain-2]]
| |
| [[Category: Large Structures]] | | [[Category: Large Structures]] |
| [[Category: Davies, P L]] | | [[Category: Rattus norvegicus]] |
| [[Category: Elce, J S]] | | [[Category: Davies PL]] |
| [[Category: Hosfield, C M]] | | [[Category: Elce JS]] |
| [[Category: Jia, Z]] | | [[Category: Hosfield CM]] |
| [[Category: C2 domain]] | | [[Category: Jia Z]] |
| [[Category: Calmodulin]]
| |
| [[Category: Calpain]]
| |
| [[Category: Catalytic triad]]
| |
| [[Category: Cysteine protease]]
| |
| [[Category: Hydrolase]]
| |
| [[Category: Papain]]
| |
| [[Category: Protease]]
| |
| [[Category: Zymogen]]
| |
| [[Category: Zymogen activation]]
| |