3wqz
From Proteopedia
(Difference between revisions)
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| - | ==Crystal structure of | + | ==Crystal structure of Archaeoglobus fulgidus alanyl-tRNA synthetase in complex with a tRNA(Ala) variant having A3.U70== |
<StructureSection load='3wqz' size='340' side='right' caption='[[3wqz]], [[Resolution|resolution]] 3.49Å' scene=''> | <StructureSection load='3wqz' size='340' side='right' caption='[[3wqz]], [[Resolution|resolution]] 3.49Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3wqz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3wqz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3wqz RCSB], [http://www.ebi.ac.uk/pdbsum/3wqz PDBsum]</span></td></tr> | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3wqz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3wqz OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3wqz RCSB], [http://www.ebi.ac.uk/pdbsum/3wqz PDBsum]</span></td></tr> | ||
<table> | <table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Ligation of tRNAs with their cognate amino acids, by aminoacyl-tRNA synthetases, establishes the genetic code. Throughout evolution, tRNA(Ala) selection by alanyl-tRNA synthetase (AlaRS) has depended predominantly on a single wobble base pair in the acceptor stem, G3*U70, mainly on the kcat level. Here we report the crystal structures of an archaeal AlaRS in complex with tRNA(Ala) with G3*U70 and its A3*U70 variant. AlaRS interacts with both the minor- and the major-groove sides of G3*U70, widening the major groove. The geometry difference between G3*U70 and A3*U70 is transmitted along the acceptor stem to the 3'-CCA region. Thus, the 3'-CCA region of tRNA(Ala) with G3*U70 is oriented to the reactive route that reaches the active site, whereas that of the A3*U70 variant is folded back into the non-reactive route. This novel mechanism enables the single wobble pair to dominantly determine the specificity of tRNA selection, by an approximate 100-fold difference in kcat. | ||
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| + | The selective tRNA aminoacylation mechanism based on a single G*U pair.,Naganuma M, Sekine S, Chong YE, Guo M, Yang XL, Gamper H, Hou YM, Schimmel P, Yokoyama S Nature. 2014 Jun 26;510(7506):507-11. doi: 10.1038/nature13440. Epub 2014 Jun 11. PMID:24919148<ref>PMID:24919148</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
Revision as of 06:14, 2 July 2014
Crystal structure of Archaeoglobus fulgidus alanyl-tRNA synthetase in complex with a tRNA(Ala) variant having A3.U70
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