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| | ==NMR SOLUTION STRUCTURE OF THE CALCIUM-BOUND C-TERMINAL DOMAIN (W81-S161) OF CALCIUM VECTOR PROTEIN FROM AMPHIOXUS== | | ==NMR SOLUTION STRUCTURE OF THE CALCIUM-BOUND C-TERMINAL DOMAIN (W81-S161) OF CALCIUM VECTOR PROTEIN FROM AMPHIOXUS== |
| - | <StructureSection load='1c7v' size='340' side='right'caption='[[1c7v]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | + | <StructureSection load='1c7v' size='340' side='right'caption='[[1c7v]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1c7v]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Amphioxus_lanceolatum Amphioxus lanceolatum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C7V OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1C7V FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1c7v]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Branchiostoma_lanceolatum Branchiostoma lanceolatum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C7V OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1C7V FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1c7w|1c7w]]</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</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=1c7v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c7v OCA], [http://pdbe.org/1c7v PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1c7v RCSB], [http://www.ebi.ac.uk/pdbsum/1c7v PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1c7v 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=1c7v FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c7v OCA], [https://pdbe.org/1c7v PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1c7v RCSB], [https://www.ebi.ac.uk/pdbsum/1c7v PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1c7v ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CAVP_BRALA CAVP_BRALA]] The exact function of this protein is not yet known. It interacts with CAVPT, a protein also of unknown function, in a calcium-dependent way. This protein binds two calcium ions. | + | [https://www.uniprot.org/uniprot/CAVP_BRALA CAVP_BRALA] The exact function of this protein is not yet known. It interacts with CAVPT, a protein also of unknown function, in a calcium-dependent way. This protein binds two calcium ions. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Amphioxus lanceolatum]] | + | [[Category: Branchiostoma lanceolatum]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Baladi, S]] | + | [[Category: Baladi S]] |
| - | [[Category: Cox, J A]] | + | [[Category: Cox JA]] |
| - | [[Category: Craescu, C T]] | + | [[Category: Craescu CT]] |
| - | [[Category: Sakamoto, H]] | + | [[Category: Sakamoto H]] |
| - | [[Category: Theret, I]] | + | [[Category: Theret I]] |
| - | [[Category: Calcium binding protein]]
| + | |
| - | [[Category: Ef-hand family]]
| + | |
| - | [[Category: Metal binding protein]]
| + | |
| Structural highlights
Function
CAVP_BRALA The exact function of this protein is not yet known. It interacts with CAVPT, a protein also of unknown function, in a calcium-dependent way. This protein binds two calcium ions.
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 PubMed
Calcium vector protein (CaVP) from amphioxus is a two-domain, calcium-binding protein (18.3 kDa) of the calmodulin superfamily. Only two of the four EF-hand motifs (sites III and IV) have a significant binding affinity for calcium ions. We determined the solution structure of the domain containing these active sites (C-CaVP: W81-S161), in the Ca(2+)-saturated state, using NMR spectroscopy and restrained molecular dynamics. The tertiary structure is similar to other Ca(2+)-binding domains containing a pair of EF-hand motifs. The apo state has spectroscopic and thermodynamic characteristics of a molten globule, with conserved secondary structure but highly fluctuating tertiary organization. Titration of C-CaVP with Ca(2+) revealed a stepwise ion binding, with a stable equilibrium intermediate in which only site III binds a calcium ion. Despite a highly fluctuating structure of the free site IV, the calcium-bound site III has a persistent structure, with similar secondary elements but different interhelix angle and hydrophobic packing relative to the fully calcium-saturated state.
Sequential calcium binding to the regulatory domain of calcium vector protein reveals functional asymmetry and a novel mode of structural rearrangement.,Theret I, Baladi S, Cox JA, Sakamoto H, Craescu CT Biochemistry. 2000 Jul 11;39(27):7920-6. PMID:10891072[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Theret I, Baladi S, Cox JA, Sakamoto H, Craescu CT. Sequential calcium binding to the regulatory domain of calcium vector protein reveals functional asymmetry and a novel mode of structural rearrangement. Biochemistry. 2000 Jul 11;39(27):7920-6. PMID:10891072
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