This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1av6

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 11:18, 22 November 2017

VACCINIA METHYLTRANSFERASE VP39 COMPLEXED WITH M7G CAPPED RNA HEXAMER AND S-ADENOSYLHOMOCYSTEINE

Structural highlights

1av6 is a 2 chain structure with sequence from Vaccw. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	PAPS, VACWR095, F9 (VACCW)
Activity:	mRNA (nucleoside-2'-O)-methyltransferase, with EC number 2.1.1.57
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MCE_VACCW] Displays methyltransferase, positive regulation of the poly(A) polymerase and transcription elongation activities. Involved in the modification of both mRNA ends and in intermediate and late gene positive transcription elongation. At the mRNAs 5' end, methylates the ribose 2' OH group of the first transcribed nucleotide, thereby producing a 2'-O-methylpurine cap. At the 3' end, functions as a processivity factor which stimulates the activity of the viral poly(A) polymerase VP55 that creates mRNA's poly(A) tail. In the presence of VP39, VP55 does not dissociate from the RNA allowing tail elongation to around 250 adenylates.^[1] ^[2] ^[3]

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

Sequence-nonspecific binding of RNA, recognition of a 7-methylguanosine 5' mRNA cap, and methylation of a nucleic acid backbone are three crucial and ubiquitous events in eukaryotic nucleic acid processing and function. These three events occur concurrently in the modification of vaccinia transcripts by the methyltransferase VP39. We report the crystal structure of a ternary complex comprising VP39, coenzyme product S-adenosylhomocysteine, and a 5' m7 G-capped, single-stranded RNA hexamer. This structure reveals a novel and general mechanism for sequence-non-specific recognition of the mRNA transcript in which the protein interacts solely with the sugar-phosphate backbone of a short, single-stranded RNA helix. This report represents the first direct and detailed view of a protein complexed with single-stranded RNA or 5'-capped mRNA.

Structural basis for sequence-nonspecific recognition of 5'-capped mRNA by a cap-modifying enzyme.,Hodel AE, Gershon PD, Quiocho FA Mol Cell. 1998 Feb;1(3):443-7. PMID:9660928^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Schnierle BS, Gershon PD, Moss B. Cap-specific mRNA (nucleoside-O2'-)-methyltransferase and poly(A) polymerase stimulatory activities of vaccinia virus are mediated by a single protein. Proc Natl Acad Sci U S A. 1992 Apr 1;89(7):2897-901. PMID:1313572
↑ Gershon PD, Ahn BY, Garfield M, Moss B. Poly(A) polymerase and a dissociable polyadenylation stimulatory factor encoded by vaccinia virus. Cell. 1991 Sep 20;66(6):1269-78. PMID:1670500
↑ Latner DR, Thompson JM, Gershon PD, Storrs C, Condit RC. The positive transcription elongation factor activity of the vaccinia virus J3 protein is independent from its (nucleoside-2'-O-) methyltransferase and poly(A) polymerase stimulatory functions. Virology. 2002 Sep 15;301(1):64-80. PMID:12359447
↑ Hodel AE, Gershon PD, Quiocho FA. Structural basis for sequence-nonspecific recognition of 5'-capped mRNA by a cap-modifying enzyme. Mol Cell. 1998 Feb;1(3):443-7. PMID:9660928

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/1av6"

@@ Line 1: / Line 1: @@
 ==VACCINIA METHYLTRANSFERASE VP39 COMPLEXED WITH M7G CAPPED RNA HEXAMER AND S-ADENOSYLHOMOCYSTEINE==
 <StructureSection load='1av6' size='340' side='right' caption='[[1av6]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PAPS, VACWR095, F9 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10254 VACCW])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/mRNA_(nucleoside-2'-O)-methyltransferase mRNA (nucleoside-2'-O)-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.57 2.1.1.57] </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=1av6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1av6 OCA], [http://pdbe.org/1av6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1av6 RCSB], [http://www.ebi.ac.uk/pdbsum/1av6 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=1av6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1av6 OCA], [http://pdbe.org/1av6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1av6 RCSB], [http://www.ebi.ac.uk/pdbsum/1av6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1av6 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 29: / Line 30: @@
 </div>
 <div class="pdbe-citations 1av6" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Poly(A) Polymerase|Poly(A) Polymerase]]
 == References ==
 <references/>

1av6

From Proteopedia

Revision as of 11:18, 22 November 2017

VACCINIA METHYLTRANSFERASE VP39 COMPLEXED WITH M7G CAPPED RNA HEXAMER AND S-ADENOSYLHOMOCYSTEINE

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox