4z94: Difference between revisions
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==Actin Complex With a Chimera of Tropomodulin-1 and Leiomodin-1 Actin-Binding Site 2== | ==Actin Complex With a Chimera of Tropomodulin-1 and Leiomodin-1 Actin-Binding Site 2== | ||
<StructureSection load='4z94' size='340' side='right' caption='[[4z94]], [[Resolution|resolution]] 2.40Å' scene=''> | <StructureSection load='4z94' size='340' side='right'caption='[[4z94]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4z94]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[4z94]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4Z94 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4Z94 FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=HIC:4-METHYL-HISTIDINE'>HIC</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=4z94 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4z94 OCA], [https://pdbe.org/4z94 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4z94 RCSB], [https://www.ebi.ac.uk/pdbsum/4z94 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4z94 ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://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. | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 25: | Line 21: | ||
==See Also== | ==See Also== | ||
*[[Actin|Actin]] | *[[Actin 3D structures|Actin 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Homo sapiens]] | ||
[[Category: Large Structures]] | |||
[[Category: Oryctolagus cuniculus]] | [[Category: Oryctolagus cuniculus]] | ||
[[Category: Boczkowska | [[Category: Boczkowska M]] | ||
[[Category: Dominguez | [[Category: Dominguez R]] | ||
[[Category: Rebowski | [[Category: Rebowski G]] | ||
Latest revision as of 11:14, 27 September 2023
Actin Complex With a Chimera of Tropomodulin-1 and Leiomodin-1 Actin-Binding Site 2Actin Complex With a Chimera of Tropomodulin-1 and Leiomodin-1 Actin-Binding Site 2
Structural highlights
FunctionACTS_RABIT Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Publication Abstract from PubMedHow proteins sharing a common fold have evolved different functions is a fundamental question in biology. Tropomodulins (Tmods) are prototypical actin filament pointed-end-capping proteins, whereas their homologues, Leiomodins (Lmods), are powerful filament nucleators. We show that Tmods and Lmods do not compete biochemically, and display similar but distinct localization in sarcomeres. Changes along the polypeptide chains of Tmods and Lmods exquisitely adapt their functions for capping versus nucleation. Tmods have alternating tropomyosin (TM)- and actin-binding sites (TMBS1, ABS1, TMBS2 and ABS2). Lmods additionally contain a C-terminal extension featuring an actin-binding WH2 domain. Unexpectedly, the different activities of Tmods and Lmods do not arise from the Lmod-specific extension. Instead, nucleation by Lmods depends on two major adaptations-the loss of pointed-end-capping elements present in Tmods and the specialization of the highly conserved ABS2 for recruitment of two or more actin subunits. The WH2 domain plays only an auxiliary role in nucleation. How Leiomodin and Tropomodulin use a common fold for different actin assembly functions.,Boczkowska M, Rebowski G, Kremneva E, Lappalainen P, Dominguez R Nat Commun. 2015 Sep 15;6:8314. doi: 10.1038/ncomms9314. PMID:26370058[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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