View source for 1mea

==METHIONYL-TRNA SYNTHETASE ZINC BINDING DOMAIN. 3D STRUCTURE AND HOMOLOGY WITH RUBREDOXIN AND GAG RETROVIRAL PROTEINS==
<StructureSection load='1mea' size='340' side='right' caption='[[1mea]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1mea]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MEA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1MEA FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1med|1med]]</td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GAG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])</td></tr>
<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Methionine--tRNA_ligase Methionine--tRNA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.10 6.1.1.10] </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=1mea FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mea OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1mea RCSB], [http://www.ebi.ac.uk/pdbsum/1mea PDBsum]</span></td></tr>
<table>
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== Publication Abstract from PubMed ==
Methionyl-tRNA synthetase from Escherichia coli contains one tightly bound zinc atom per subunit. The region encompassing residues 138 to 163 of this enzyme is responsible for the metal binding. A 28-mer peptide corresponding to these residues was expressed in vivo and shown to contain approximately 1 mol of tightly bound Zn/mol of peptide. In this study, the three-dimensional solution structure of this peptide was solved by means of two-dimensional proton NMR spectroscopy. A total of 133 nuclear Overhauser effect distance constraints and 22 dihedral angle restraints were used for the calculations, using a hybrid distance-geometry-simulated annealing strategy. Excluding the first four residues, the resulting structure is well-defined (r.m.s.d. 0.71 A for backbone atoms) and composed of a series of four tight turns. The second and the fourth turns are composed of CXXC sequences which are structurally homologous to the NH-S turns found in the metal binding sites of gag retroviral proteins and rubredoxin. The solution structure of the zinc binding peptide shows significant discrepancies with the crystal structure of methionyl-tRNA synthetase.

Methionyl-tRNA synthetase zinc binding domain. Three-dimensional structure and homology with rubredoxin and gag retroviral proteins.,Fourmy D, Dardel F, Blanquet S J Mol Biol. 1993 Jun 20;231(4):1078-89. PMID:8515466<ref>PMID:8515466</ref>

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

==See Also==
*[[Aminoacyl tRNA Synthetase|Aminoacyl tRNA Synthetase]]
== References ==
<references/>
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Methionine--tRNA ligase]]
[[Category: Dardel, F.]]
[[Category: Fourmy, D.]]
[[Category: Aminoacyl-trna synthase]]