1ckn
From Proteopedia
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| - | [[Image:1ckn.gif|left|200px]] | ||
| - | + | ==STRUCTURE OF GUANYLYLATED MRNA CAPPING ENZYME COMPLEXED WITH GTP== | |
| - | + | <StructureSection load='1ckn' size='340' side='right'caption='[[1ckn]], [[Resolution|resolution]] 2.50Å' scene=''> | |
| - | + | == Structural highlights == | |
| - | | | + | <table><tr><td colspan='2'>[[1ckn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Paramecium_bursaria_Chlorella_virus_1 Paramecium bursaria Chlorella virus 1]. The January 2012 RCSB PDB [https://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 [https://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 [https://proteopedia.org/fgij/fg.htm?mol=1CKN 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]] 2.5Å</td></tr> | |
| - | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GPL:LYSINE+GUANOSINE-5-MONOPHOSPHATE'>GPL</scene>, <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></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=1ckn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ckn OCA], [https://pdbe.org/1ckn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ckn RCSB], [https://www.ebi.ac.uk/pdbsum/1ckn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ckn ProSAT]</span></td></tr> | |
| - | + | </table> | |
| - | + | == Function == | |
| - | + | [https://www.uniprot.org/uniprot/MCE_PBCV1 MCE_PBCV1] mRNA capping. Transfers a GMP cap onto the end of mRNA that terminates with a 5'-diphosphate tail. | |
| - | + | == 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/ck/1ckn_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=1ckn ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
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. | 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. | ||
| - | + | 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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| - | X-ray crystallography reveals a large conformational change during guanyl transfer by mRNA capping enzymes., Hakansson K, Doherty AJ, Shuman S, Wigley DB | + | |
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| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| + | </div> | ||
| + | <div class="pdbe-citations 1ckn" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Messenger RNA Capping]] | ||
| + | [[Category: Paramecium bursaria Chlorella virus 1]] | ||
| + | [[Category: RCSB PDB Molecule of the Month]] | ||
| + | [[Category: Doherty AJ]] | ||
| + | [[Category: Hakansson K]] | ||
| + | [[Category: Wigley DB]] | ||
Current revision
STRUCTURE OF GUANYLYLATED MRNA CAPPING ENZYME COMPLEXED WITH GTP
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