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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4jhd]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JHD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JHD FirstGlance]. <br>
<table><tr><td colspan='2'>[[4jhd]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JHD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JHD FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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]] 2.91&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</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=4jhd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jhd OCA], [https://pdbe.org/4jhd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jhd RCSB], [https://www.ebi.ac.uk/pdbsum/4jhd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jhd 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=4jhd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jhd OCA], [https://pdbe.org/4jhd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jhd RCSB], [https://www.ebi.ac.uk/pdbsum/4jhd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jhd ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/ACT1_DROME ACT1_DROME] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.  Multiple isoforms are involved in various cellular functions such as cytoskeleton structure, cell mobility, chromosome movement and muscle contraction.
[https://www.uniprot.org/uniprot/ACT1_DROME ACT1_DROME] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.  Multiple isoforms are involved in various cellular functions such as cytoskeleton structure, cell mobility, chromosome movement and muscle contraction.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Spontaneous nucleation of actin is very inefficient in cells. To overcome this barrier, cells have evolved a set of actin filament nucleators to promote rapid nucleation and polymerization in response to specific stimuli. However, the molecular mechanism of actin nucleation remains poorly understood. This is hindered largely by the fact that actin nucleus, once formed, rapidly polymerizes into filament, thus making it impossible to capture stable multisubunit actin nucleus. Here, we report an effective double-mutant strategy to stabilize actin nucleus by preventing further polymerization. Employing this strategy, we solved the crystal structure of AMPPNP-actin in complex with the first two tandem W domains of Cordon-bleu (Cobl), a potent actin filament nucleator. Further sequence comparison and functional studies suggest that the nucleation mechanism of Cobl is probably shared by the p53 cofactor JMY, but not Spire. Moreover, the double-mutant strategy opens the way for atomic mechanistic study of actin nucleation and polymerization.
Structural Basis of Actin Filament Nucleation by Tandem W Domains.,Chen X, Ni F, Tian X, Kondrashkina E, Wang Q, Ma J Cell Rep. 2013 May 29. pii: S2211-1247(13)00210-6. doi:, 10.1016/j.celrep.2013.04.028. PMID:23727244<ref>PMID:23727244</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4jhd" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Actin 3D structures|Actin 3D structures]]
*[[Actin 3D structures|Actin 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>

Latest revision as of 12:03, 1 March 2024

Crystal Structure of an Actin Dimer in Complex with the Actin Nucleator Cordon-Bleu

4jhd, resolution 2.91Å

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