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==CryoEM structure of MyosinVI-actin complex in the rigor (nucleotide-free) state, backbone-averaged with side chains truncated to alanine==
==CryoEM structure of MyosinVI-actin complex in the rigor (nucleotide-free) state, backbone-averaged with side chains truncated to alanine==
<StructureSection load='6bnv' size='340' side='right' caption='[[6bnv]], [[Resolution|resolution]] 4.60&Aring;' scene=''>
<SX load='6bnv' size='340' side='right' viewer='molstar' caption='[[6bnv]], [[Resolution|resolution]] 4.60&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6bnv]] is a 20 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6BNV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6BNV FirstGlance]. <br>
<table><tr><td colspan='2'>[[6bnv]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus], [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus] and [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6BNV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6BNV FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6bnp|6bnp]]</td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 4.6&#8491;</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=6bnv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6bnv OCA], [http://pdbe.org/6bnv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6bnv RCSB], [http://www.ebi.ac.uk/pdbsum/6bnv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6bnv 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=6bnv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6bnv OCA], [https://pdbe.org/6bnv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6bnv RCSB], [https://www.ebi.ac.uk/pdbsum/6bnv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6bnv ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/CALM_CHICK CALM_CHICK]] Calmodulin mediates the control of a large number of enzymes, ion channels and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases. [[http://www.uniprot.org/uniprot/ACTS_RABIT ACTS_RABIT]] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.  
[https://www.uniprot.org/uniprot/MYO6_PIG MYO6_PIG] Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Myosin 6 is a reverse-direction motor protein that moves towards the minus-end of actin filaments. Has slow rate of actin-activated ADP release due to weak ATP binding. Functions in a variety of intracellular processes such as vesicular membrane trafficking and cell migration. Required for the structural integrity of the Golgi apparatus via the p53-dependent pro-survival pathway. Appears to be involved in a very early step of clathrin-mediated endocytosis in polarized epithelial cells. May act as a regulator of F-actin dynamics. May play a role in transporting DAB2 from the plasma membrane to specific cellular targets. Required for structural integrity of inner ear hair cells (By similarity).<ref>PMID:16917816</ref>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Despite extensive scrutiny of the myosin superfamily, the lack of high-resolution structures of actin-bound states has prevented a complete description of its mechanochemical cycle and limited insight into how sequence and structural diversification of the motor domain gives rise to specialized functional properties. Here we present cryo-EM structures of the unique minus-end directed myosin VI motor domain in rigor (4.6 A) and Mg-ADP (5.5 A) states bound to F-actin. Comparison to the myosin IIC-F-actin rigor complex reveals an almost complete lack of conservation of residues at the actin-myosin interface despite preservation of the primary sequence regions composing it, suggesting an evolutionary path for motor specialization. Additionally, analysis of the transition from ADP to rigor provides a structural rationale for force sensitivity in this step of the mechanochemical cycle. Finally, we observe reciprocal rearrangements in actin and myosin accompanying the transition between these states, supporting a role for actin structural plasticity during force generation by myosin VI.


Cryo-EM structures reveal specialization at the myosin VI-actin interface and a mechanism of force sensitivity.,Gurel PS, Kim LY, Ruijgrok PV, Omabegho T, Bryant Z, Alushin GM Elife. 2017 Dec 4;6. doi: 10.7554/eLife.31125. PMID:29199952<ref>PMID:29199952</ref>
==See Also==
 
*[[Actin 3D structures|Actin 3D structures]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
*[[Calmodulin 3D structures|Calmodulin 3D structures]]
</div>
*[[Myosin 3D Structures|Myosin 3D Structures]]
<div class="pdbe-citations 6bnv" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</SX>
[[Category: Gallus gallus]]
[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Oryctolagus cuniculus]]
[[Category: Alushin, G A]]
[[Category: Sus scrofa]]
[[Category: Gurel, P S]]
[[Category: Alushin GA]]
[[Category: Complex]]
[[Category: Gurel PS]]
[[Category: Contractile protein]]
[[Category: Cytoskeleton]]
[[Category: Filament]]

Latest revision as of 17:22, 13 March 2024

CryoEM structure of MyosinVI-actin complex in the rigor (nucleotide-free) state, backbone-averaged with side chains truncated to alanineCryoEM structure of MyosinVI-actin complex in the rigor (nucleotide-free) state, backbone-averaged with side chains truncated to alanine

6bnv, resolution 4.60Å

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