1umr: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1umr]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Crotalus_durissus_terrificus Crotalus durissus terrificus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UMR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UMR FirstGlance]. <br> | <table><tr><td colspan='2'>[[1umr]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Crotalus_durissus_terrificus Crotalus durissus terrificus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UMR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1UMR FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4Å</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=1umr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1umr OCA], [https://pdbe.org/1umr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1umr RCSB], [https://www.ebi.ac.uk/pdbsum/1umr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1umr ProSAT]</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=1umr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1umr OCA], [https://pdbe.org/1umr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1umr RCSB], [https://www.ebi.ac.uk/pdbsum/1umr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1umr ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/SLA_CRODU SLA_CRODU] Snake venom lectin that activates platelets by binding to the platelet collagen receptor glycoprotein VI (GP6) (PubMed:9153205). The indirect activation of integrin alpha-IIb/beta-3 (ITGA2B/ITGB3) also induced by the toxin is upstream the cytoskeletal translocation of GPIb, FcRgamma (FCER1G) and 14-3-3zeta (YWHAZ)(PubMed:16102113).<ref>PMID:9153205</ref> <ref>PMID:16102113</ref> | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: Crotalus durissus terrificus]] | [[Category: Crotalus durissus terrificus]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Arni | [[Category: Arni RK]] | ||
[[Category: Cintra | [[Category: Cintra ACO]] | ||
[[Category: Gava | [[Category: Gava LM]] | ||
[[Category: Michelan-Duarte | [[Category: Michelan-Duarte S]] | ||
[[Category: Murakami | [[Category: Murakami MT]] | ||
[[Category: Zela | [[Category: Zela SP]] | ||
Revision as of 15:51, 13 December 2023
Crystal structure of the platelet activator convulxin, a disulfide linked a4b4 cyclic tetramer from the venom of Crotalus durissus terrificusCrystal structure of the platelet activator convulxin, a disulfide linked a4b4 cyclic tetramer from the venom of Crotalus durissus terrificus
Structural highlights
FunctionSLA_CRODU Snake venom lectin that activates platelets by binding to the platelet collagen receptor glycoprotein VI (GP6) (PubMed:9153205). The indirect activation of integrin alpha-IIb/beta-3 (ITGA2B/ITGB3) also induced by the toxin is upstream the cytoskeletal translocation of GPIb, FcRgamma (FCER1G) and 14-3-3zeta (YWHAZ)(PubMed:16102113).[1] [2] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedConvulxin (CVX), a C-type lectin, isolated from the venom of the South American rattlesnake Crotalus durissus terrificus, causes cardiovascular and respiratory disturbances and is a potent platelet activator which binds to platelet glycoprotein GPVI. The structure of CVX has been solved at 2.4A resolution to a crystallographic residual of 18.6% (R(free)=26.4%). CVX is a disulfide linked heterodimer consisting of homologous alpha and beta chains. The heterodimers are additionally linked by disulfide bridges to form cyclic alpha(4)beta(4)heterotetramers. These domains exhibit significant homology to the carbohydrate-binding domains of C-type lectins, to the factor IX-binding protein (IX-bp), and to flavocetin-A (Fl-A) but sequence and structural differences are observed in both the domains in the putative Ca(2+)and carbohydrate binding regions. Crystal structure of the platelet activator convulxin, a disulfide-linked alpha4beta4 cyclic tetramer from the venom of Crotalus durissus terrificus.,Murakami MT, Zela SP, Gava LM, Michelan-Duarte S, Cintra AC, Arni RK Biochem Biophys Res Commun. 2003 Oct 17;310(2):478-82. PMID:14521935[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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