View source for 7rr5


==Structure of ribosomal complex bound with Rbg1/Tma46==
<StructureSection load='7rr5' size='340' side='right'caption='[[7rr5]], [[Resolution|resolution]] 3.23&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7rr5]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7RR5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7RR5 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.23&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=5CT:HYPUSINE'>5CT</scene>, <scene name='pdbligand=ASP:ASPARTIC+ACID'>ASP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=7rr5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7rr5 OCA], [https://pdbe.org/7rr5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7rr5 RCSB], [https://www.ebi.ac.uk/pdbsum/7rr5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7rr5 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Conserved developmentally regulated guanosine triphosphate (GTP)-binding proteins (Drgs) and their binding partner Drg family regulatory proteins (Dfrps) are important for embryonic development, cellular growth control, differentiation, and proliferation. Here, we report that the yeast Drg1/Dfrp1 ortholog Rbg1/Tma46 facilitates translational initiation, elongation, and termination by suppressing prolonged ribosome pausing. Consistent with the genome-wide observations, deletion of Rbg1 exacerbates the growth defect resulting from translation stalling, and Rbg1 stabilizes mRNAs against no-go decay. Furthermore, we provide a cryoelectron microscopy (cryo-EM) structure of the 80S ribosome bound with Rbg1/Tma46 that reveals the molecular interactions responsible for Rbg1/Tma46 function. The Rbg1 subunit binds to the GTPase association center of the ribosome and the A-tRNA, and the N-terminal zinc finger domain of the Tma46 subunit binds to the 40S, establishing an interaction critical for the ribosomal association. Our results answer the fundamental question of how a paused ribosome resumes translation and show that Drg1/Dfrp1 play a critical role in ensuring orderly translation.

Conserved heterodimeric GTPase Rbg1/Tma46 promotes efficient translation in eukaryotic cells.,Zeng F, Li X, Pires-Alves M, Chen X, Hawk CW, Jin H Cell Rep. 2021 Oct 26;37(4):109877. doi: 10.1016/j.celrep.2021.109877. PMID:34706231<ref>PMID:34706231</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7rr5" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribosome 3D structures|Ribosome 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Chen X]]
[[Category: Hawk CW]]
[[Category: Jin H]]
[[Category: Li X]]
[[Category: Pires-Alves M]]
[[Category: Zeng F]]