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< | ==Ternary complex of E. coli leucyl-tRNA synthetase, tRNA(leu) and leucyl-adenylate analogue in the aminoacylation conformation== | ||
<StructureSection load='4aq7' size='340' side='right'caption='[[4aq7]], [[Resolution|resolution]] 2.50Å' scene=''> | |||
== Structural highlights == | |||
or the | <table><tr><td colspan='2'>[[4aq7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AQ7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4AQ7 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]] 2.5Å</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=LMS:[(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-3,4-DIHYDROXYTETRAHYDRO-2-FURANYL]METHYL+SULFAMATE'>LMS</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=4aq7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4aq7 OCA], [https://pdbe.org/4aq7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4aq7 RCSB], [https://www.ebi.ac.uk/pdbsum/4aq7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4aq7 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/SYL_ECOLI SYL_ECOLI] | |||
<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®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4aq7" 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: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: | [[Category: Escherichia coli K-12]] | ||
[[Category: Crepin | [[Category: Large Structures]] | ||
[[Category: Cusack | [[Category: Crepin T]] | ||
[[Category: Jr | [[Category: Cusack S]] | ||
[[Category: Martinis | [[Category: Lincecum Jr TL]] | ||
[[Category: Palencia | [[Category: Martinis SA]] | ||
[[Category: Vu | [[Category: Palencia A]] | ||
[[Category: Vu MT]] | |||
Latest revision as of 14:32, 20 December 2023
Ternary complex of E. coli leucyl-tRNA synthetase, tRNA(leu) and leucyl-adenylate analogue in the aminoacylation conformationTernary complex of E. coli leucyl-tRNA synthetase, tRNA(leu) and leucyl-adenylate analogue in the aminoacylation conformation
Structural highlights
FunctionPublication Abstract from PubMedLeucyl-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[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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