1ri5

From Proteopedia

(Difference between revisions)

Revision as of 02:26, 25 December 2014

Structure and mechanism of mRNA cap (guanine N-7) methyltransferase

Structural highlights

1ri5 is a 1 chain structure with sequence from Encephalitozoon cuniculi. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1ri1, 1ri2, 1ri3, 1ri4
Gene:	ECU10_0380 (Encephalitozoon cuniculi)
Resources:	FirstGlance, OCA, RCSB, PDBsum, TOPSAN

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 PubMed

A 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

↑ Hausmann S, Zheng S, Fabrega C, Schneller SW, Lima CD, Shuman S. Encephalitozoon cuniculi mRNA cap (guanine N-7) methyltransferase: methyl acceptor specificity, inhibition BY S-adenosylmethionine analogs, and structure-guided mutational analysis. J Biol Chem. 2005 May 27;280(21):20404-12. Epub 2005 Mar 9. PMID:15760890 doi:10.1074/jbc.M501073200
↑ Fabrega C, Hausmann S, Shen V, Shuman S, Lima CD. Structure and mechanism of mRNA cap (guanine-N7) methyltransferase. Mol Cell. 2004 Jan 16;13(1):77-89. PMID:14731396

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ri5"

@@ Line 7: / Line 7: @@
 <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=1ri5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ri5 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ri5 RCSB], [http://www.ebi.ac.uk/pdbsum/1ri5 PDBsum], [http://www.topsan.org/Proteins/NYSGXRC/1ri5 TOPSAN]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/MCES_ENCCU 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.<ref>PMID:15760890</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

1ri5

From Proteopedia

Revision as of 02:26, 25 December 2014

Structure and mechanism of mRNA cap (guanine N-7) methyltransferase

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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