1ckn

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{{STRUCTURE_1ckn| PDB=1ckn | SCENE= }}
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==STRUCTURE OF GUANYLYLATED MRNA CAPPING ENZYME COMPLEXED WITH GTP==
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===STRUCTURE OF GUANYLYLATED MRNA CAPPING ENZYME COMPLEXED WITH GTP===
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<StructureSection load='1ckn' size='340' side='right' caption='[[1ckn]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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{{ABSTRACT_PUBMED_9160746}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1ckn]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Paramecium_bursaria_chlorella_virus_1 Paramecium bursaria chlorella virus 1]. The January 2012 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Messenger RNA Capping'' by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2012_1 10.2210/rcsb_pdb/mom_2012_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CKN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CKN FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
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<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=GPL:LYSINE+GUANOSINE-5-MONOPHOSPHATE'>GPL</scene></td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/mRNA_guanylyltransferase mRNA guanylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.50 2.7.7.50] </span></td></tr>
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<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=1ckn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ckn OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ckn RCSB], [http://www.ebi.ac.uk/pdbsum/1ckn PDBsum]</span></td></tr>
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<table>
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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/ck/1ckn_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/chain_selection.php?pdb_ID=2ata 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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We have solved the crystal structure of an mRNA capping enzyme at 2.5 A resolution. The enzyme comprises two domains with a deep, but narrow, cleft between them. The two molecules in the crystallographic asymmetric unit adopt very different conformations; both contain a bound GTP, but one protein molecule is in an open conformation while the other is in a closed conformation. Only in the closed conformation is the enzyme able to bind manganese ions and undergo catalysis within the crystals to yield the covalent guanylated enzyme intermediate. These structures provide direct evidence for a mechanism that involves a significant conformational change in the enzyme during catalysis.
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==About this Structure==
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X-ray crystallography reveals a large conformational change during guanyl transfer by mRNA capping enzymes.,Hakansson K, Doherty AJ, Shuman S, Wigley DB Cell. 1997 May 16;89(4):545-53. PMID:9160746<ref>PMID:9160746</ref>
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[[1ckn]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Paramecium_bursaria_chlorella_virus_1 Paramecium bursaria chlorella virus 1]. The January 2012 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Messenger RNA Capping'' by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2012_1 10.2210/rcsb_pdb/mom_2012_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CKN OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<ref group="xtra">PMID:009160746</ref><references group="xtra"/><references/>
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</div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Messenger RNA Capping]]
[[Category: Messenger RNA Capping]]
[[Category: Paramecium bursaria chlorella virus 1]]
[[Category: Paramecium bursaria chlorella virus 1]]

Revision as of 10:03, 3 October 2014

STRUCTURE OF GUANYLYLATED MRNA CAPPING ENZYME COMPLEXED WITH GTP

1ckn, resolution 2.50Å

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