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==Structure of nucleotide-free scallop myosin S1==
==Structure of nucleotide-free scallop myosin S1==
<StructureSection load='1sr6' size='340' side='right' caption='[[1sr6]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
<StructureSection load='1sr6' size='340' side='right'caption='[[1sr6]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1sr6]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Argopecten_irradians Argopecten irradians]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SR6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1SR6 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1sr6]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Argopecten_irradians Argopecten irradians]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SR6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SR6 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 2.75&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1s5g|1s5g]], [[1qvi|1qvi]], [[1kk8|1kk8]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=1sr6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sr6 OCA], [http://pdbe.org/1sr6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1sr6 RCSB], [http://www.ebi.ac.uk/pdbsum/1sr6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1sr6 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=1sr6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sr6 OCA], [https://pdbe.org/1sr6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sr6 RCSB], [https://www.ebi.ac.uk/pdbsum/1sr6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sr6 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/MYS_ARGIR MYS_ARGIR]] Muscle contraction.  Myosin is a protein that binds to F-actin and has ATPase activity that is activated by F-actin. [[http://www.uniprot.org/uniprot/MLE_ARGIR MLE_ARGIR]] In molluscan muscle, calcium regulation is associated with myosin rather than with actin. Muscle myosin contains two types of light chains: the catalytic light chain, essential for ATPase activity, and the regulatory light chain, a calcium-binding protein responsible for Ca(2+) dependent binding and Ca(2+) dependent Mg-ATPase activity. [[http://www.uniprot.org/uniprot/MLR_ARGIR MLR_ARGIR]] In molluscan muscle, calcium regulation is associated with myosin rather than with actin. Muscle myosin contains two types of light chains: the catalytic light chain, essential for ATPase activity, and the regulatory light chain, a calcium-binding protein responsible for Ca(2+) dependent binding and Ca(2+) dependent Mg-ATPase activity.  
[https://www.uniprot.org/uniprot/MYS_ARGIR MYS_ARGIR] Muscle contraction.  Myosin is a protein that binds to F-actin and has ATPase activity that is activated by F-actin.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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==See Also==
==See Also==
*[[Myosin|Myosin]]
*[[Myosin 3D Structures|Myosin 3D Structures]]
== References ==
== References ==
<references/>
<references/>
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</StructureSection>
</StructureSection>
[[Category: Argopecten irradians]]
[[Category: Argopecten irradians]]
[[Category: Cohen, C]]
[[Category: Large Structures]]
[[Category: Gourinath, S]]
[[Category: Cohen C]]
[[Category: Himmel, D M]]
[[Category: Gourinath S]]
[[Category: Risal, D]]
[[Category: Himmel DM]]
[[Category: Szent-Gyorgyi, A G]]
[[Category: Risal D]]
[[Category: Complex salt bridge]]
[[Category: Szent-Gyorgyi AG]]
[[Category: Contractile protein]]
[[Category: Near rigor]]
[[Category: Novel conformation of nucleotide]]
[[Category: Scallop myosin s1]]

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