View source for 6t20


==Cryo-EM structure of phalloidin-stabilized F-actin (aged)==
<SX load='6t20' size='340' side='right' viewer='molstar' caption='[[6t20]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6t20]] is a 10 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=6T20 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6T20 FirstGlance]. <br>
</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='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DTH:D-THREONINE'>DTH</scene>, <scene name='pdbligand=EEP:'>EEP</scene>, <scene name='pdbligand=HIC:4-METHYL-HISTIDINE'>HIC</scene>, <scene name='pdbligand=HYP:4-HYDROXYPROLINE'>HYP</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6t1y|6t1y]], [[6t23|6t23]], [[6t24|6t24]], [[6t25|6t25]], [[5ooc|5ooc]], [[5ood|5ood]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6t20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6t20 OCA], [http://pdbe.org/6t20 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6t20 RCSB], [http://www.ebi.ac.uk/pdbsum/6t20 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6t20 ProSAT]</span></td></tr>
</table>
== Function ==
[[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. 
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== Publication Abstract from PubMed ==
Actin undergoes structural transitions during polymerization, ATP hydrolysis, and subsequent release of inorganic phosphate. Several actin-binding proteins sense specific states during this transition and can thus target different regions of the actin filament. Here, we show in atomic detail that phalloidin, a mushroom toxin that is routinely used to stabilize and label actin filaments, suspends the structural changes in actin, likely influencing its interaction with actin-binding proteins. Furthermore, high-resolution cryoelectron microscopy structures reveal structural rearrangements in F-actin upon inorganic phosphate release in phalloidin-stabilized filaments. We find that the effect of the sponge toxin jasplakinolide differs from the one of phalloidin, despite their overlapping binding site and similar interactions with the actin filament. Analysis of structural conformations of F-actin suggests that stabilizing agents trap states within the natural conformational space of actin.

Structural Effects and Functional Implications of Phalloidin and Jasplakinolide Binding to Actin Filaments.,Pospich S, Merino F, Raunser S Structure. 2020 Feb 12. pii: S0969-2126(20)30041-1. doi:, 10.1016/j.str.2020.01.014. PMID:32084355<ref>PMID:32084355</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6t20" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</SX>
[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Merino, F]]
[[Category: Pospich, S]]
[[Category: Raunser, S]]
[[Category: Cytoskeleton]]
[[Category: Phalloidin]]
[[Category: Stabilized-actin filament]]
[[Category: Structural protein]]