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| | <StructureSection load='3b9b' size='340' side='right'caption='[[3b9b]], [[Resolution|resolution]] 2.65Å' scene=''> | | <StructureSection load='3b9b' size='340' side='right'caption='[[3b9b]], [[Resolution|resolution]] 2.65Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3b9b]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3B9B OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=3B9B FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3b9b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3B9B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3B9B FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEF:BERYLLIUM+TRIFLUORIDE+ION'>BEF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></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]] 2.65Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1t5t|1t5t]], [[1xp5|1xp5]], [[2c88|2c88]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEF:BERYLLIUM+TRIFLUORIDE+ION'>BEF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Calcium-transporting_ATPase Calcium-transporting ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.3.8 3.6.3.8] </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=3b9b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b9b OCA], [https://pdbe.org/3b9b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3b9b RCSB], [https://www.ebi.ac.uk/pdbsum/3b9b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3b9b ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=3b9b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b9b OCA], [http://pdbe.org/3b9b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3b9b RCSB], [http://www.ebi.ac.uk/pdbsum/3b9b PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3b9b ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/AT2A1_RABIT AT2A1_RABIT]] This magnesium-dependent enzyme catalyzes the hydrolysis of ATP coupled with the translocation of calcium from the cytosol to the sarcoplasmic reticulum lumen. Contributes to calcium sequestration involved in muscular excitation/contraction (By similarity). | + | [https://www.uniprot.org/uniprot/AT2A1_RABIT AT2A1_RABIT] This magnesium-dependent enzyme catalyzes the hydrolysis of ATP coupled with the translocation of calcium from the cytosol to the sarcoplasmic reticulum lumen. Contributes to calcium sequestration involved in muscular excitation/contraction (By similarity). |
| | == 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: Calcium-transporting ATPase]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| | [[Category: Oryctolagus cuniculus]] | | [[Category: Oryctolagus cuniculus]] |
| - | [[Category: Moller, J V]] | + | [[Category: Moller JV]] |
| - | [[Category: Morth, J P]] | + | [[Category: Morth JP]] |
| - | [[Category: Nissen, P]] | + | [[Category: Nissen P]] |
| - | [[Category: Olesen, C]] | + | [[Category: Olesen C]] |
| - | [[Category: Picard, M]] | + | [[Category: Picard M]] |
| - | [[Category: Winther, A M.L]] | + | [[Category: Winther AML]] |
| - | [[Category: Alternative splicing]]
| + | |
| - | [[Category: Atp-binding]]
| + | |
| - | [[Category: Beryllium fluoride]]
| + | |
| - | [[Category: Ca2+-atpase]]
| + | |
| - | [[Category: Calcium]]
| + | |
| - | [[Category: Calcium transport]]
| + | |
| - | [[Category: Endoplasmic reticulum]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Ion transport]]
| + | |
| - | [[Category: Magnesium]]
| + | |
| - | [[Category: Membrane protein]]
| + | |
| - | [[Category: Metal-binding]]
| + | |
| - | [[Category: Nucleotide-binding]]
| + | |
| - | [[Category: P-type atpase]]
| + | |
| - | [[Category: Phosphorylation]]
| + | |
| - | [[Category: Sarcoplasmic reticulum]]
| + | |
| - | [[Category: Transmembrane]]
| + | |
| - | [[Category: Transport]]
| + | |
| Structural highlights
Function
AT2A1_RABIT This magnesium-dependent enzyme catalyzes the hydrolysis of ATP coupled with the translocation of calcium from the cytosol to the sarcoplasmic reticulum lumen. Contributes to calcium sequestration involved in muscular excitation/contraction (By similarity).
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
The sarcoplasmic reticulum Ca2+-ATPase, a P-type ATPase, has a critical role in muscle function and metabolism. Here we present functional studies and three new crystal structures of the rabbit skeletal muscle Ca2+-ATPase, representing the phosphoenzyme intermediates associated with Ca2+ binding, Ca2+ translocation and dephosphorylation, that are based on complexes with a functional ATP analogue, beryllium fluoride and aluminium fluoride, respectively. The structures complete the cycle of nucleotide binding and cation transport of Ca2+-ATPase. Phosphorylation of the enzyme triggers the onset of a conformational change that leads to the opening of a luminal exit pathway defined by the transmembrane segments M1 through M6, which represent the canonical membrane domain of P-type pumps. Ca2+ release is promoted by translocation of the M4 helix, exposing Glu 309, Glu 771 and Asn 796 to the lumen. The mechanism explains how P-type ATPases are able to form the steep electrochemical gradients required for key functions in eukaryotic cells.
The structural basis of calcium transport by the calcium pump.,Olesen C, Picard M, Winther AM, Gyrup C, Morth JP, Oxvig C, Moller JV, Nissen P Nature. 2007 Dec 13;450(7172):1036-42. PMID:18075584[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Olesen C, Picard M, Winther AM, Gyrup C, Morth JP, Oxvig C, Moller JV, Nissen P. The structural basis of calcium transport by the calcium pump. Nature. 2007 Dec 13;450(7172):1036-42. PMID:18075584 doi:10.1038/nature06418
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