1pg2: Difference between revisions
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==METHIONYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI COMPLEXED WITH METHIONINE AND ADENOSINE== | ==METHIONYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI COMPLEXED WITH METHIONINE AND ADENOSINE== | ||
<StructureSection load='1pg2' size='340' side='right' caption='[[1pg2]], [[Resolution|resolution]] 1.75Å' scene=''> | <StructureSection load='1pg2' size='340' side='right'caption='[[1pg2]], [[Resolution|resolution]] 1.75Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1pg2]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1pg2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PG2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1PG2 FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[ | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADN:ADENOSINE'>ADN</scene>, <scene name='pdbligand=MET:METHIONINE'>MET</scene></td></tr> | |||
<tr><td class="sblockLbl"><b>[[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1pg2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pg2 OCA], [https://pdbe.org/1pg2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1pg2 RCSB], [https://www.ebi.ac.uk/pdbsum/1pg2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1pg2 ProSAT]</span></td></tr> | ||
</table> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | == Function == | ||
<table> | [https://www.uniprot.org/uniprot/SYM_ECOLI SYM_ECOLI] Is required not only for elongation of protein synthesis but also for the initiation of all mRNA translation through initiator tRNA(fMet) aminoacylation.[HAMAP-Rule:MF_00098] | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pg/1pg2_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pg/1pg2_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1pg2 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 1pg2" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Aminoacyl tRNA | *[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 35: | Line 37: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Blanquet | [[Category: Blanquet S]] | ||
[[Category: Crepin | [[Category: Crepin T]] | ||
[[Category: Honek | [[Category: Honek JF]] | ||
[[Category: Mechulam | [[Category: Mechulam Y]] | ||
[[Category: Sampson | [[Category: Sampson PB]] | ||
[[Category: Schmitt | [[Category: Schmitt E]] | ||
[[Category: Vaughan | [[Category: Vaughan MD]] | ||
Latest revision as of 12:42, 16 August 2023
METHIONYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI COMPLEXED WITH METHIONINE AND ADENOSINEMETHIONYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI COMPLEXED WITH METHIONINE AND ADENOSINE
Structural highlights
FunctionSYM_ECOLI Is required not only for elongation of protein synthesis but also for the initiation of all mRNA translation through initiator tRNA(fMet) aminoacylation.[HAMAP-Rule:MF_00098] 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 PubMedBinding of methionine to methionyl-tRNA synthetase (MetRS) is known to promote conformational changes within the active site. However, the contribution of these rearrangements to enzyme catalysis is not fully understood. In this study, several methionine and methionyl adenylate analogues were diffused into crystals of the monomeric form of Escherichia coli methionyl-tRNA synthetase. The structures of the corresponding complexes were solved at resolutions below 1.9A and compared to those of the enzyme free or complexed with methionine. Residues Y15 and W253 play key roles in the strength of the binding of the amino acid and of its analogues. Indeed, full motions of these residues are required to recover the maximum in free energy of binding. Residue Y15 also controls the size of the hydrophobic pocket where the amino acid side-chain interacts. H301 appears to participate to the specific recognition of the sulphur atom of methionine. Complexes with methionyl adenylate analogues illustrate the shielding by MetRS of the region joining the methionine and adenosine moieties. Finally, the structure of MetRS complexed to a methionine analogue mimicking the tetrahedral carbon of the transition state in the aminoacylation reaction was solved. On the basis of this model, we propose that, in response to the binding of the 3'-end of tRNA, Y15 moves again in order to deshield the anhydride bond in the natural adenylate. Use of analogues of methionine and methionyl adenylate to sample conformational changes during catalysis in Escherichia coli methionyl-tRNA synthetase.,Crepin T, Schmitt E, Mechulam Y, Sampson PB, Vaughan MD, Honek JF, Blanquet S J Mol Biol. 2003 Sep 5;332(1):59-72. PMID:12946347[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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