2e21: Difference between revisions
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< | ==Crystal structure of TilS in a complex with AMPPNP from Aquifex aeolicus.== | ||
<StructureSection load='2e21' size='340' side='right'caption='[[2e21]], [[Resolution|resolution]] 2.70Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2e21]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Aquifex_aeolicus Aquifex aeolicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2E21 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2E21 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]] 2.7Å</td></tr> | |||
-- | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</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=2e21 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2e21 OCA], [https://pdbe.org/2e21 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2e21 RCSB], [https://www.ebi.ac.uk/pdbsum/2e21 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2e21 ProSAT], [https://www.topsan.org/Proteins/RSGI/2e21 TOPSAN]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TILS_AQUAE TILS_AQUAE] Ligates lysine onto the cytidine present at position 34 of the AUA codon-specific tRNA(Ile) that contains the anticodon CAU, in an ATP-dependent manner. Cytidine is converted to lysidine, thus changing the amino acid specificity of the tRNA from methionine to isoleucine (By similarity). | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/e2/2e21_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</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/main_output.php?pdb_ID=2e21 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
In the bacterial genetic-code system, the codon AUA is decoded as isoleucine by tRNA(Ile)(2) with the lysidine residue at the wobble position. Lysidine is derived from cytidine, with ATP and L-lysine, by tRNA(Ile) lysidine synthetase (TilS), which is an N-type ATP pyrophosphatase. In this study, we determined the crystal structure of Aquifex aeolicus TilS, complexed with ATP, Mg2+, and L-lysine, at 2.5 A resolution. The presence of the TilS-specific subdomain causes the active site to have two separate gateways, a large hole and a narrow tunnel on the opposite side. ATP is bound inside the hole, and L-lysine is bound at the entrance of the tunnel. The conserved Asp36 in the PP-motif coordinates Mg2+. In these initial binding modes, the ATP, Mg2+, and L-lysine are held far apart from each other, but they seem to be brought together for the reaction upon cytidine binding, with putative structural changes of the complex. | |||
Structural basis of the initial binding of tRNA(Ile) lysidine synthetase TilS with ATP and L-lysine.,Kuratani M, Yoshikawa Y, Bessho Y, Higashijima K, Ishii T, Shibata R, Takahashi S, Yutani K, Yokoyama S Structure. 2007 Dec;15(12):1642-53. PMID:18073113<ref>PMID:18073113</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2e21" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Aquifex aeolicus]] | [[Category: Aquifex aeolicus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Bessho | [[Category: Bessho Y]] | ||
[[Category: Ishii | [[Category: Ishii T]] | ||
[[Category: Kuratani | [[Category: Kuratani M]] | ||
[[Category: Sekine S]] | |||
[[Category: Sekine | [[Category: Shibata R]] | ||
[[Category: Shibata | [[Category: Yokoyama S]] | ||
[[Category: Yokoyama | [[Category: Yoshikawa Y]] | ||
[[Category: Yoshikawa | |||
Latest revision as of 08:33, 25 October 2023
Crystal structure of TilS in a complex with AMPPNP from Aquifex aeolicus.
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