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| | <StructureSection load='2cfo' size='340' side='right'caption='[[2cfo]], [[Resolution|resolution]] 2.45Å' scene=''> | | <StructureSection load='2cfo' size='340' side='right'caption='[[2cfo]], [[Resolution|resolution]] 2.45Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2cfo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pcc_6301 Pcc 6301]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CFO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2CFO FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2cfo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechococcus_elongatus Synechococcus elongatus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2CFO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2CFO FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.45Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Glutamate--tRNA_ligase Glutamate--tRNA ligase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.17 6.1.1.17] </span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</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=2cfo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2cfo OCA], [https://pdbe.org/2cfo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2cfo RCSB], [https://www.ebi.ac.uk/pdbsum/2cfo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2cfo ProSAT]</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=2cfo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2cfo OCA], [https://pdbe.org/2cfo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2cfo RCSB], [https://www.ebi.ac.uk/pdbsum/2cfo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2cfo ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/SYE_THEEB SYE_THEEB]] Non-discriminating glutamyl-tRNA synthetase. Catalyzes the attachment of glutamate to tRNA(Glu) in a two-step reaction: glutamate is first activated by ATP to form Glu-AMP and then transferred to the acceptor end of tRNA(Glu). Acylates both tRNA(Glu) and tRNA(Gln) with glutamate, but has 13-fold higher efficiency with tRNA(Glu).<ref>PMID:16876193</ref>
| + | [https://www.uniprot.org/uniprot/SYE_THEVB SYE_THEVB] Non-discriminating glutamyl-tRNA synthetase. Catalyzes the attachment of glutamate to tRNA(Glu) in a two-step reaction: glutamate is first activated by ATP to form Glu-AMP and then transferred to the acceptor end of tRNA(Glu). Acylates both tRNA(Glu) and tRNA(Gln) with glutamate, but has 13-fold higher efficiency with tRNA(Glu).<ref>PMID:16876193</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Glutamate--tRNA ligase]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Pcc 6301]] | + | [[Category: Synechococcus elongatus]] |
| - | [[Category: Heinz, D W]] | + | [[Category: Heinz DW]] |
| - | [[Category: Jahn, D]] | + | [[Category: Jahn D]] |
| - | [[Category: Nickel, D]] | + | [[Category: Nickel D]] |
| - | [[Category: Schubert, W D]] | + | [[Category: Schubert W-D]] |
| - | [[Category: Schulze, J O]] | + | [[Category: Schulze JO]] |
| - | [[Category: Aminoacyl-trna synthetase]]
| + | |
| - | [[Category: Atp-binding]]
| + | |
| - | [[Category: Ligase]]
| + | |
| - | [[Category: Nucleotide-binding]]
| + | |
| Structural highlights
Function
SYE_THEVB Non-discriminating glutamyl-tRNA synthetase. Catalyzes the attachment of glutamate to tRNA(Glu) in a two-step reaction: glutamate is first activated by ATP to form Glu-AMP and then transferred to the acceptor end of tRNA(Glu). Acylates both tRNA(Glu) and tRNA(Gln) with glutamate, but has 13-fold higher efficiency with tRNA(Glu).[1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Error-free protein biosynthesis is dependent on the reliable charging of each tRNA with its cognate amino acid. Many bacteria, however, lack a glutaminyl-tRNA synthetase. In these organisms, tRNA(Gln) is initially mischarged with glutamate by a non-discriminating glutamyl-tRNA synthetase (ND-GluRS). This enzyme thus charges both tRNA(Glu) and tRNA(Gln) with glutamate. Discriminating GluRS (D-GluRS), found in some bacteria and all eukaryotes, exclusively generates Glu-tRNA(Glu). Here we present the first crystal structure of a non-discriminating GluRS from Thermosynechococcus elongatus (ND-GluRS(Tel)) in complex with glutamate at a resolution of 2.45 A. Structurally, the enzyme shares the overall architecture of the discriminating GluRS from Thermus thermophilus (D-GluRS(Tth)). We confirm experimentally that GluRS(Tel) is non-discriminating and present kinetic parameters for synthesis of Glu-tRNA(Glu) and of Glu-tRNA(Gln). Anticodons of tRNA(Glu) (34C/UUC36) and tRNA(Gln) (34C/UUG36) differ only in base 36. The pyrimidine base of C36 is specifically recognized in D-GluRS(Tth) by the residue Arg358. In ND-GluRS(Tel) this arginine residue is replaced by glycine (Gly366) presumably allowing both cytosine and the bulkier purine base G36 of tRNA(Gln) to be tolerated. Most other ND-GluRS share this structural feature, leading to relaxed substrate specificity.
Crystal structure of a non-discriminating glutamyl-tRNA synthetase.,Schulze JO, Masoumi A, Nickel D, Jahn M, Jahn D, Schubert WD, Heinz DW J Mol Biol. 2006 Sep 1;361(5):888-97. Epub 2006 Jul 5. PMID:16876193[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Schulze JO, Masoumi A, Nickel D, Jahn M, Jahn D, Schubert WD, Heinz DW. Crystal structure of a non-discriminating glutamyl-tRNA synthetase. J Mol Biol. 2006 Sep 1;361(5):888-97. Epub 2006 Jul 5. PMID:16876193 doi:10.1016/j.jmb.2006.06.054
- ↑ Schulze JO, Masoumi A, Nickel D, Jahn M, Jahn D, Schubert WD, Heinz DW. Crystal structure of a non-discriminating glutamyl-tRNA synthetase. J Mol Biol. 2006 Sep 1;361(5):888-97. Epub 2006 Jul 5. PMID:16876193 doi:10.1016/j.jmb.2006.06.054
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