2oa0

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[[Image:2oa0.png|left|200px]]
 
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{{STRUCTURE_2oa0| PDB=2oa0 | SCENE= }}
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==Crystal structure of Calcium ATPase with bound ADP and cyclopiazonic acid==
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<StructureSection load='2oa0' size='340' side='right'caption='[[2oa0]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2oa0]] 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=2OA0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OA0 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]] 3.4&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=CZA:(6AR,11AS,11BR)-10-ACETYL-9-HYDROXY-7,7-DIMETHYL-2,6,6A,7,11A,11B-HEXAHYDRO-11H-PYRROLO[1,2 2,3]ISOINDOLO[4,5,6-CD]INDOL-11-ONE'>CZA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=2oa0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2oa0 OCA], [https://pdbe.org/2oa0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2oa0 RCSB], [https://www.ebi.ac.uk/pdbsum/2oa0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2oa0 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[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).
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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/oa/2oa0_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=2oa0 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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The sarcoplasmic reticulum Ca(2+)-ATPase is essential for calcium reuptake in the muscle contraction-relaxation cycle. Here we present structures of a calcium-free state with bound cyclopiazonic acid (CPA) and magnesium fluoride at 2.65 A resolution and a calcium-free state with bound CPA and ADP at 3.4A resolution. In both structures, CPA occupies the calcium access channel delimited by transmembrane segments M1-M4. Inhibition of Ca(2+)-ATPase is stabilized by a polar pocket that surrounds the tetramic acid of CPA and a hydrophobic platform that cradles the inhibitor. The calcium pump residues involved include Gln(56), Leu(61), Val(62), and Asn(101). We conclude that CPA inhibits the calcium pump by blocking the calcium access channel and immobilizing a subset of transmembrane helices. In the E2(CPA) structure, ADP is bound in a distinct orientation within the nucleotide binding pocket. The adenine ring is sandwiched between Arg(489) of the nucleotide-binding domain and Arg(678) of the phosphorylation domain. This mode of binding conforms to an adenine recognition motif commonly found in ATP-dependent proteins.
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===Crystal structure of Calcium ATPase with bound ADP and cyclopiazonic acid===
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The molecular basis for cyclopiazonic acid inhibition of the sarcoplasmic reticulum calcium pump.,Moncoq K, Trieber CA, Young HS J Biol Chem. 2007 Mar 30;282(13):9748-57. Epub 2007 Jan 26. PMID:17259168<ref>PMID:17259168</ref>
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{{ABSTRACT_PUBMED_17259168}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 2oa0" style="background-color:#fffaf0;"></div>
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[[2oa0]] 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=2OA0 OCA].
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==See Also==
==See Also==
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*[[ATPase|ATPase]]
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*[[ATPase 3D structures|ATPase 3D structures]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:017259168</ref><references group="xtra"/>
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__TOC__
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[[Category: Calcium-transporting ATPase]]
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Oryctolagus cuniculus]]
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[[Category: Moncoq, K A.]]
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[[Category: Moncoq KA]]
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[[Category: Young, H S.]]
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[[Category: Young HS]]
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[[Category: Calcium atpase]]
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[[Category: Cyclopiazonic acid]]
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[[Category: Hydrolase]]
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[[Category: Mycotoxin]]
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[[Category: Serca]]
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Current revision

Crystal structure of Calcium ATPase with bound ADP and cyclopiazonic acid

PDB ID 2oa0

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