1ri4: Difference between revisions
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==Structure and mechanism of mRNA cap (guanine N-7) methyltransferase== | ==Structure and mechanism of mRNA cap (guanine N-7) methyltransferase== | ||
<StructureSection load='1ri4' size='340' side='right' caption='[[1ri4]], [[Resolution|resolution]] 2.40Å' scene=''> | <StructureSection load='1ri4' size='340' side='right' caption='[[1ri4]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ri1|1ri1]], [[1ri2|1ri2]], [[1ri3|1ri3]], [[1ri5|1ri5]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ri1|1ri1]], [[1ri2|1ri2]], [[1ri3|1ri3]], [[1ri5|1ri5]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ECU10_0380 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6035 ENCCN])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ECU10_0380 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6035 ENCCN])</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=1ri4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ri4 OCA], [http://pdbe.org/1ri4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ri4 RCSB], [http://www.ebi.ac.uk/pdbsum/1ri4 PDBsum]</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=1ri4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ri4 OCA], [http://pdbe.org/1ri4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ri4 RCSB], [http://www.ebi.ac.uk/pdbsum/1ri4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ri4 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ri/1ri4_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ri/1ri4_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </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/ | </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=1ri4 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
Revision as of 10:38, 28 February 2018
Structure and mechanism of mRNA cap (guanine N-7) methyltransferaseStructure and mechanism of mRNA cap (guanine N-7) methyltransferase
Structural highlights
Function[MCES_ENCCU] mRNA-capping methyltransferase that methylates the N7 position of the added guanosine to the 5'-cap structure of mRNAs. Binds RNA containing 5'-terminal GpppC.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedA suite of crystal structures is reported for a cellular mRNA cap (guanine-N7) methyltransferase in complex with AdoMet, AdoHcy, and the cap guanylate. Superposition of ligand complexes suggests an in-line mechanism of methyl transfer, albeit without direct contacts between the enzyme and either the N7 atom of guanine (the attacking nucleophile), the methyl carbon of AdoMet, or the sulfur of AdoMet/AdoHcy (the leaving group). The structures indicate that catalysis of cap N7 methylation is accomplished by optimizing proximity and orientation of the substrates, assisted by a favorable electrostatic environment. The enzyme-ligand structures, together with new mutational data, fully account for the biochemical specificity of the cap guanine-N7 methylation reaction, an essential and defining step of eukaryotic mRNA synthesis. Structure and mechanism of mRNA cap (guanine-N7) methyltransferase.,Fabrega C, Hausmann S, Shen V, Shuman S, Lima CD Mol Cell. 2004 Jan 16;13(1):77-89. PMID:14731396[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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