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2e3c

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[[Image:2e3c.png|left|200px]]
 
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{{STRUCTURE_2e3c| PDB=2e3c | SCENE= }}
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==Crystal structure of the catalytic domain of pyrrolysyl-tRNA synthetase==
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<StructureSection load='2e3c' size='340' side='right'caption='[[2e3c]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2e3c]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanosarcina_mazei Methanosarcina mazei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2E3C OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2E3C FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.65&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2e3c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2e3c OCA], [https://pdbe.org/2e3c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2e3c RCSB], [https://www.ebi.ac.uk/pdbsum/2e3c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2e3c ProSAT], [https://www.topsan.org/Proteins/RSGI/2e3c TOPSAN]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PYLS_METMA PYLS_METMA] Catalyzes the attachment of pyrrolysine to tRNA(Pyl). Pyrrolysine is a lysine derivative encoded by the termination codon UAG (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/e3/2e3c_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2e3c ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Pyrrolysine, a lysine derivative with a bulky pyrroline ring, is the "22nd" genetically encoded amino acid. In the present study, the carboxy-terminal catalytic fragment of Methanosarcina mazei pyrrolysyl-tRNA synthetase (PylRS) was analyzed by X-ray crystallography and site-directed mutagenesis. The catalytic fragment ligated tRNA(Pyl) with pyrrolysine nearly as efficiently as the full-length PylRS. We determined the crystal structures of the PylRS catalytic fragment in the substrate-free, ATP analogue (AMPPNP)-bound, and AMPPNP/pyrrolysine-bound forms, and compared them with the previously-reported PylRS structures. The ordering loop and the motif-2 loop undergo conformational changes from the "open" states to the "closed" states upon AMPPNP binding. On the other hand, the beta 7-beta 8 hairpin exhibits multiple conformational states, the open, intermediate (beta 7-open/beta 8-open and beta 7-closed/beta 8-open), and closed states, which are not induced upon substrate binding. The PylRS structures with a docked tRNA suggest that the active-site pocket can accommodate the CCA terminus of tRNA when the motif-2 loop is in the closed state and the beta 7-beta 8 hairpin is in the open or intermediate state. The entrance of the active-site pocket is nearly closed in the closed state of the beta 7-beta 8 hairpin, which may protect the pyrrolysyladenylate intermediate in the absence of tRNA(Pyl). Moreover, a structure-based mutational analysis revealed that hydrophobic residues in the amino acid-binding tunnel are important for accommodating the pyrrolysine side chain and that Asn346 is essential for anchoring the side-chain carbonyl and alpha-amino groups of pyrrolysine. In addition, a docking model of PylRS with tRNA was constructed based on the aspartyl-tRNA synthetase/tRNA structure, and was confirmed by a mutational analysis.
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===Crystal structure of the catalytic domain of pyrrolysyl-tRNA synthetase===
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Crystallographic studies on multiple conformational states of active-site loops in pyrrolysyl-tRNA synthetase.,Yanagisawa T, Ishii R, Fukunaga R, Kobayashi T, Sakamoto K, Yokoyama S J Mol Biol. 2008 May 2;378(3):634-52. Epub 2008 Feb 29. PMID:18387634<ref>PMID:18387634</ref>
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{{ABSTRACT_PUBMED_18387634}}
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==About this Structure==
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<div class="pdbe-citations 2e3c" style="background-color:#fffaf0;"></div>
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[[2e3c]] is a 1 chain structure of [[Aminoacyl tRNA Synthetase]] and [[Pyrrolysyl-tRNA synthetase]] with sequence from [http://en.wikipedia.org/wiki/Methanosarcina_mazei Methanosarcina mazei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2E3C OCA].
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==See Also==
==See Also==
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*[[Aminoacyl tRNA Synthetase|Aminoacyl tRNA Synthetase]]
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*[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]]
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*[[Pyrrolysyl-tRNA synthetase|Pyrrolysyl-tRNA synthetase]]
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== References ==
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<references/>
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==Reference==
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__TOC__
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<ref group="xtra">PMID:018387634</ref><references group="xtra"/>
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Methanosarcina mazei]]
[[Category: Methanosarcina mazei]]
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[[Category: Ishii, R.]]
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[[Category: Ishii R]]
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[[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]]
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[[Category: Yanagisawa T]]
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[[Category: Yanagisawa, T.]]
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[[Category: Yokoyama S]]
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[[Category: Yokoyama, S.]]
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[[Category: Aminoacyl-trna synthetase]]
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[[Category: Ligase]]
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[[Category: National project on protein structural and functional analyse]]
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[[Category: Nppsfa]]
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[[Category: Pyrrolysine]]
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[[Category: Riken structural genomics/proteomics initiative]]
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[[Category: Rsgi]]
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[[Category: Structural genomic]]
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[[Category: Translation]]
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[[Category: Trna]]
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Current revision

Crystal structure of the catalytic domain of pyrrolysyl-tRNA synthetase

PDB ID 2e3c

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