1fyf

<table><tr><td colspan='2'>[[1fyf]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FYF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1FYF FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SSA:5-O-(N-(L-SERYL)-SULFAMOYL)ADENOSINE'>SSA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1qf6|1qf6]], [[1evk|1evk]], [[1evl|1evl]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Threonine--tRNA_ligase Threonine--tRNA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.3 6.1.1.3] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1fyf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fyf OCA], [http://pdbe.org/1fyf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1fyf RCSB], [http://www.ebi.ac.uk/pdbsum/1fyf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1fyf ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/SYT_ECOLI SYT_ECOLI]] ThrS is also a translational repressor protein, it controls the translation of its own gene by binding to its mRNA.[HAMAP-Rule:MF_00184]

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== Publication Abstract from PubMed ==

Threonyl-tRNA synthetase, a class II synthetase, uses a unique zinc ion to discriminate against the isosteric valine at the activation step. The crystal structure of the enzyme with an analog of seryl adenylate shows that the noncognate serine cannot be fully discriminated at that step. We show that hydrolysis of the incorrectly formed ser-tRNA(Thr) is performed at a specific site in the N-terminal domain of the enzyme. The present study suggests that both classes of synthetases use effectively the ability of the CCA end of tRNA to switch between a hairpin and a helical conformation for aminoacylation and editing. As a consequence, the editing mechanism of both classes of synthetases can be described as mirror images, as already seen for tRNA binding and amino acid activation.

Transfer RNA-mediated editing in threonyl-tRNA synthetase. The class II solution to the double discrimination problem.,Dock-Bregeon A, Sankaranarayanan R, Romby P, Caillet J, Springer M, Rees B, Francklyn CS, Ehresmann C, Moras D Cell. 2000 Dec 8;103(6):877-84. PMID:11136973<ref>PMID:11136973</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1fyf" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Dock-Bregeon, A C]]

[[Category: Moras, D]]

[[Category: Sankaranarayanan, R]]

[[Category: Zinc ion]]