View source for 6hcq


==Structure of the rabbit collided di-ribosome (collided monosome)==
<SX load='6hcq' size='340' side='right' viewer='molstar' caption='[[6hcq]], [[Resolution|resolution]] 6.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6hcq]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryctolagus_cuniculus Oryctolagus cuniculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6HCQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6HCQ 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]] 6.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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=6hcq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6hcq OCA], [https://pdbe.org/6hcq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6hcq RCSB], [https://www.ebi.ac.uk/pdbsum/6hcq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6hcq ProSAT]</span></td></tr>
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== Function ==
[https://www.uniprot.org/uniprot/RL32_RABIT RL32_RABIT] Component of the large ribosomal subunit (PubMed:26245381, PubMed:27863242, PubMed:30517857). The ribosome is a large ribonucleoprotein complex responsible for the synthesis of proteins in the cell (PubMed:26245381, PubMed:27863242, PubMed:30517857).<ref>PMID:26245381</ref> <ref>PMID:27863242</ref> <ref>PMID:30517857</ref> 
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== Publication Abstract from PubMed ==
Aberrantly slow translation elicits quality control pathways initiated by the ubiquitin ligase ZNF598. How ZNF598 discriminates physiologic from pathologic translation complexes and ubiquitinates stalled ribosomes selectively is unclear. Here, we find that the minimal unit engaged by ZNF598 is the collided di-ribosome, a molecular species that arises when a trailing ribosome encounters a slower leading ribosome. The collided di-ribosome structure reveals an extensive 40S-40S interface in which the ubiquitination targets of ZNF598 reside. The paucity of 60S interactions allows for different ribosome rotation states, explaining why ZNF598 recognition is indifferent to how the leading ribosome has stalled. The use of ribosome collisions as a proxy for stalling allows the degree of tolerable slowdown to be tuned by the initiation rate on that mRNA; hence, the threshold for triggering quality control is substrate specific. These findings illustrate how higher-order ribosome architecture can be exploited by cellular factors to monitor translation status.

ZNF598 Is a Quality Control Sensor of Collided Ribosomes.,Juszkiewicz S, Chandrasekaran V, Lin Z, Kraatz S, Ramakrishnan V, Hegde RS Mol Cell. 2018 Oct 1. pii: S1097-2765(18)30697-X. doi:, 10.1016/j.molcel.2018.08.037. PMID:30293783<ref>PMID:30293783</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 6hcq" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribosome 3D structures|Ribosome 3D structures]]
== References ==
<references/>
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[[Category: Large Structures]]
[[Category: Oryctolagus cuniculus]]
[[Category: Chandrasekaran V]]
[[Category: Hegde RS]]
[[Category: Juszkiewicz S]]
[[Category: Kraatz S]]
[[Category: Lin Z]]
[[Category: Ramakrishnan V]]