View source for 4u1d


==Structure of the PCI domain of translation initiation factor eIF3a==
<StructureSection load='4u1d' size='340' side='right'caption='[[4u1d]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4u1d]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U1D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U1D 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]] 3.3&#8491;</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=4u1d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u1d OCA], [https://pdbe.org/4u1d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u1d RCSB], [https://www.ebi.ac.uk/pdbsum/4u1d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u1d ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/EIF3A_YEAST EIF3A_YEAST] Component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome.<ref>PMID:9694884</ref> <ref>PMID:11387228</ref> <ref>PMID:12651896</ref> <ref>PMID:18765792</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Eukaryotic translation initiation requires the recruitment of the large, multiprotein eIF3 complex to the 40S ribosomal subunit. We present X-ray structures of all major components of the minimal, six-subunit Saccharomyces cerevisiae eIF3 core. These structures, together with electron microscopy reconstructions, cross-linking coupled to mass spectrometry, and integrative structure modeling, allowed us to position and orient all eIF3 components on the 40SeIF1 complex, revealing an extended, modular arrangement of eIF3 subunits. Yeast eIF3 engages 40S in a clamp-like manner, fully encircling 40S to position key initiation factors on opposite ends of the mRNA channel, providing a platform for the recruitment, assembly, and regulation of the translation initiation machinery. The structures of eIF3 components reported here also have implications for understanding the architecture of the mammalian 43S preinitiation complex and the complex of eIF3, 40S, and the hepatitis C internal ribosomal entry site RNA.

Molecular Architecture of the 40SeIF1eIF3 Translation Initiation Complex.,Erzberger JP, Stengel F, Pellarin R, Zhang S, Schaefer T, Aylett CH, Cimermancic P, Boehringer D, Sali A, Aebersold R, Ban N Cell. 2014 Aug 28;158(5):1123-35. doi: 10.1016/j.cell.2014.07.044. PMID:25171412<ref>PMID:25171412</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4u1d" style="background-color:#fffaf0;"></div>

==See Also==
*[[Eukaryotic initiation factor 3D structures|Eukaryotic initiation factor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae S288C]]
[[Category: Ban N]]
[[Category: Erzberger JP]]
[[Category: Schaefer T]]