View source for 3i5f


==Crystal structure of squid MG.ADP myosin S1==
<StructureSection load='3i5f' size='340' side='right'caption='[[3i5f]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3i5f]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Doryteuthis_pealeii Doryteuthis pealeii] and [https://en.wikipedia.org/wiki/Todarodes_pacificus Todarodes pacificus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2oy6 2oy6]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3I5F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3I5F FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.1&#8491;</td></tr>
<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=MG:MAGNESIUM+ION'>MG</scene></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=3i5f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3i5f OCA], [https://pdbe.org/3i5f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3i5f RCSB], [https://www.ebi.ac.uk/pdbsum/3i5f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3i5f ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/O44934_DORPE O44934_DORPE] 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/i5/3i5f_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=3i5f ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Unlike processive cellular motors such as myosin V, whose structure has recently been determined in a "rigor-like" conformation, myosin II from contracting muscle filaments necessarily spends most of its time detached from actin. By using squid and sea scallop sources, however, we have now obtained similar rigor-like atomic structures for muscle myosin heads (S1). The significance of the hallmark closed actin-binding cleft in these crystal structures is supported here by actin/S1-binding studies. These structures reveal how different duty ratios, and hence cellular functions, of the myosin isoforms may be accounted for, in part, on the basis of detailed differences in interdomain contacts. Moreover, the rigor-like position of switch II turns out to be unique for myosin V. The overall arrangements of subdomains in the motor are relatively conserved in each of the known contractile states, and we explore qualitatively the energetics of these states.

Rigor-like structures from muscle myosins reveal key mechanical elements in the transduction pathways of this allosteric motor.,Yang Y, Gourinath S, Kovacs M, Nyitray L, Reutzel R, Himmel DM, O'Neall-Hennessey E, Reshetnikova L, Szent-Gyorgyi AG, Brown JH, Cohen C Structure. 2007 May;15(5):553-64. PMID:17502101<ref>PMID:17502101</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3i5f" style="background-color:#fffaf0;"></div>

==See Also==
*[[Myosin|Myosin]]
*[[Myosin 3D Structures|Myosin 3D Structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Doryteuthis pealeii]]
[[Category: Large Structures]]
[[Category: Todarodes pacificus]]
[[Category: Brown JH]]
[[Category: Cohen C]]
[[Category: Gourinath S]]
[[Category: Himmel DM]]
[[Category: Kovacs M]]
[[Category: Nyitray L]]
[[Category: O'Neall-Hennessey E]]
[[Category: Reshetnikova L]]
[[Category: Reutzel R]]
[[Category: Szent-Gyorgyi AG]]
[[Category: Yang Y]]