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5jb3
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| - | '''Unreleased structure''' | ||
| - | + | ==Cryo-EM structure of a full archaeal ribosomal translation initiation complex in the P-REMOTE conformation== | |
| + | <SX load='5jb3' size='340' side='right' viewer='molstar' caption='[[5jb3]], [[Resolution|resolution]] 5.34Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5jb3]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_abyssi_GE5 Pyrococcus abyssi GE5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JB3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5JB3 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]] 5.34Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=H2U:5,6-DIHYDROURIDINE-5-MONOPHOSPHATE'>H2U</scene>, <scene name='pdbligand=MET:METHIONINE'>MET</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=OMC:O2-METHYLYCYTIDINE-5-MONOPHOSPHATE'>OMC</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</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=5jb3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jb3 OCA], [https://pdbe.org/5jb3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5jb3 RCSB], [https://www.ebi.ac.uk/pdbsum/5jb3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5jb3 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/RS11_PYRAB RS11_PYRAB] Located on the platform of the 30S subunit (By similarity). | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Eukaryotic and archaeal translation initiation complexes have a common structural core comprising e/aIF1, e/aIF1A, the ternary complex (TC, e/aIF2-GTP-Met-tRNAiMet) and mRNA bound to the small ribosomal subunit. e/aIF2 plays a crucial role in this process but how this factor controls start codon selection remains unclear. Here, we present cryo-EM structures of the full archaeal 30S initiation complex showing two conformational states of the TC. In the first state, the TC is bound to the ribosome in a relaxed conformation with the tRNA oriented out of the P site. In the second state, the tRNA is accommodated within the peptidyl (P) site and the TC becomes constrained. This constraint is compensated by codon/anticodon base pairing, whereas in the absence of a start codon, aIF2 contributes to swing out the tRNA. This spring force concept highlights a mechanism of codon/anticodon probing by the initiator tRNA directly assisted by aIF2. | ||
| - | + | Cryo-EM study of start codon selection during archaeal translation initiation.,Coureux PD, Lazennec-Schurdevin C, Monestier A, Larquet E, Cladiere L, Klaholz BP, Schmitt E, Mechulam Y Nat Commun. 2016 Nov 7;7:13366. doi: 10.1038/ncomms13366. PMID:27819266<ref>PMID:27819266</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 5jb3" style="background-color:#fffaf0;"></div> |
| - | [[Category: Coureux | + | == References == |
| - | [[Category: Mechulam | + | <references/> |
| + | __TOC__ | ||
| + | </SX> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Pyrococcus abyssi GE5]] | ||
| + | [[Category: Coureux P-D]] | ||
| + | [[Category: Mechulam Y]] | ||
| + | [[Category: Schmitt E]] | ||
Current revision
Cryo-EM structure of a full archaeal ribosomal translation initiation complex in the P-REMOTE conformation
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