View source for 4arc


==Ternary complex of E. coli leucyl-tRNA synthetase, tRNA(leu) and leucine in the editing conformation==
<StructureSection load='4arc' size='340' side='right'caption='[[4arc]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4arc]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ARC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ARC FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LEU:LEUCINE'>LEU</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2ajg|2ajg]], [[2ajh|2ajh]], [[2aji|2aji]], [[4aq7|4aq7]]</div></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Leucine--tRNA_ligase Leucine--tRNA ligase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.4 6.1.1.4] </span></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=4arc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4arc OCA], [https://pdbe.org/4arc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4arc RCSB], [https://www.ebi.ac.uk/pdbsum/4arc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4arc ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Leucyl-tRNA synthetase (LeuRS) produces error-free leucyl-tRNA(Leu) by coordinating translocation of the 3' end of (mis-)charged tRNAs from its synthetic site to a separate proofreading site for editing. Here we report cocrystal structures of the Escherichia coli LeuRS-tRNA(Leu) complex in the aminoacylation or editing conformations, showing that translocation involves correlated rotations of four flexibly linked LeuRS domains. This pivots the tRNA to guide its charged 3' end from the closed aminoacylation state to the editing site. The editing domain unexpectedly stabilizes the tRNA during aminoacylation, and a large rotation of the leucine-specific domain positions the conserved KMSKS loop to bind the 3' end of the tRNA, promoting catalysis. Our results give new insight into the structural dynamics of a molecular machine that is essential for accurate protein synthesis.

Structural dynamics of the aminoacylation and proofreading functional cycle of bacterial leucyl-tRNA synthetase.,Palencia A, Crepin T, Vu MT, Lincecum TL Jr, Martinis SA, Cusack S Nat Struct Mol Biol. 2012 Jun 10. doi: 10.1038/nsmb.2317. PMID:22683997<ref>PMID:22683997</ref>

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

==See Also==
*[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]]
*[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Ecoli]]
[[Category: Large Structures]]
[[Category: Leucine--tRNA ligase]]
[[Category: Crepin, T]]
[[Category: Cusack, S]]
[[Category: Jr, T L.Lincecum]]
[[Category: Martinis, S A]]
[[Category: Palencia, A]]
[[Category: Vu, M T]]
[[Category: Atp-binding]]
[[Category: Class i aminoacyl-trna synthetase]]
[[Category: Ligase-rna complex]]
[[Category: Metal-binding]]
[[Category: Nucleotide-binding]]
[[Category: Protein biosynthesis]]