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[[ | ==Crystal Structure of a Light Chain Domain of Scallop Smooth Muscle Myosin== | ||
<StructureSection load='3ts5' size='340' side='right' caption='[[3ts5]], [[Resolution|resolution]] 2.39Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3ts5]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Placopecten_magellanicus Placopecten magellanicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TS5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3TS5 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></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3tuy|3tuy]], [[3pn7|3pn7]]</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=3ts5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ts5 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3ts5 RCSB], [http://www.ebi.ac.uk/pdbsum/3ts5 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
We have determined the crystal structure of a phosphorylated smooth-muscle myosin light chain domain (LCD). This reconstituted LCD is of a sea scallop catch muscle myosin with its phosphorylatable regulatory light chain (RLC SmoA). In the crystal structure, Arg(16), an arginine residue that is present in this isoform but not in vertebrate smooth-muscle RLC, stabilizes the phosphorylation site. This arginine interacts with the carbonyl group of the phosphorylation-site serine in the unphosphorylated LCD (determined previously), and with the phosphate group when the serine is phosphorylated. However, the overall conformation of the LCD is essentially unchanged upon phosphorylation. This result provides additional evidence that phosphorylation of the RLC is unlikely to act as an on-switch in regulation of scallop catch muscle myosin. | |||
Crystal structure of a phosphorylated light chain domain of scallop smooth-muscle Myosin.,Senthil Kumar VS, O'Neall-Hennessey E, Reshetnikova L, Brown JH, Robinson H, Szent-Gyorgyi AG, Cohen C Biophys J. 2011 Nov 2;101(9):2185-9. Epub 2011 Nov 1. PMID:22067157<ref>PMID:22067157</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Myosin|Myosin]] | *[[Myosin|Myosin]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Placopecten magellanicus]] | [[Category: Placopecten magellanicus]] | ||
[[Category: Brown, J H | [[Category: Brown, J H]] | ||
[[Category: Cohen, C | [[Category: Cohen, C]] | ||
[[Category: Kumar, V S.S | [[Category: Kumar, V S.S]] | ||
[[Category: Neall-Hennessey, E O | [[Category: Neall-Hennessey, E O]] | ||
[[Category: Reshetnikova, L | [[Category: Reshetnikova, L]] | ||
[[Category: Robinson, H | [[Category: Robinson, H]] | ||
[[Category: Szent-Gyorgyi, A G | [[Category: Szent-Gyorgyi, A G]] | ||
[[Category: Alpha helix]] | [[Category: Alpha helix]] | ||
[[Category: Catch muscle]] | [[Category: Catch muscle]] | ||
[[Category: Myosin regulation]] | [[Category: Myosin regulation]] | ||
[[Category: Structural protein]] | [[Category: Structural protein]] | ||
Revision as of 20:00, 9 December 2014
Crystal Structure of a Light Chain Domain of Scallop Smooth Muscle MyosinCrystal Structure of a Light Chain Domain of Scallop Smooth Muscle Myosin
Structural highlights
Publication Abstract from PubMedWe have determined the crystal structure of a phosphorylated smooth-muscle myosin light chain domain (LCD). This reconstituted LCD is of a sea scallop catch muscle myosin with its phosphorylatable regulatory light chain (RLC SmoA). In the crystal structure, Arg(16), an arginine residue that is present in this isoform but not in vertebrate smooth-muscle RLC, stabilizes the phosphorylation site. This arginine interacts with the carbonyl group of the phosphorylation-site serine in the unphosphorylated LCD (determined previously), and with the phosphate group when the serine is phosphorylated. However, the overall conformation of the LCD is essentially unchanged upon phosphorylation. This result provides additional evidence that phosphorylation of the RLC is unlikely to act as an on-switch in regulation of scallop catch muscle myosin. Crystal structure of a phosphorylated light chain domain of scallop smooth-muscle Myosin.,Senthil Kumar VS, O'Neall-Hennessey E, Reshetnikova L, Brown JH, Robinson H, Szent-Gyorgyi AG, Cohen C Biophys J. 2011 Nov 2;101(9):2185-9. Epub 2011 Nov 1. PMID:22067157[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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