2xgj

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Revision as of 10:52, 13 April 2022

Structure of Mtr4, a DExH helicase involved in nuclear RNA processing and surveillance

Structural highlights

2xgj is a 4 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MTR4_YEAST] ATP-dependent RNA helicase required for the 3'-end formation of 5.8S RNA. Cofactor for the exosome complex that unwinds secondary structure in pre-rRNA. Required for nucleocytoplasmic transport of mRNA. May serve as a chaperone which translocates or normalizes the structure of mRNAs in preparation for export. Component of the TRAMP complex which has a poly(A) RNA polymerase activity and is involved in a post-transcriptional quality control mechanism limiting inappropriate expression of genetic information. Polyadenylation is required for the degradative activity of the exosome on several of its nuclear RNA substrates.^[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

Mtr4 is a conserved RNA helicase that functions together with the nuclear exosome. It participates in the processing of structured RNAs, including the maturation of 5.8S ribosomal RNA (rRNA). It also interacts with the polyadenylating Trf4-Air2 heterodimer to form the so-called TRAMP (Trf4-Air2-Mtr4 Polyadenylation) complex. TRAMP is involved in exosome-mediated degradation of aberrant RNAs in nuclear surveillance pathways. We report the 2.9-A resolution crystal structure of Saccharomyces cerevisiae Mtr4 in complex with ADP and RNA. The structure shows a central ATPase core similar to that of other DExH helicases. Inserted in the DExH core is a region characteristic of Mtr4 orthologues that folds into an elongated stalk connected to a beta-barrel domain. This domain shows unexpected similarity to the KOW domain of L24, a ribosomal protein that binds 23S rRNA. We find that indeed the KOW domain of Mtr4 is able to bind in vitro transcribed tRNA(iMet), suggesting it might assist in presenting RNA substrates to the helicase core. The interaction of Mtr4 with Trf4-Air2 is mediated not by the stalk/KOW insertion but by the DExH core. We find that in the context of the TRAMP complex, the DExH core functions independently in vitro as an RNA helicase and a protein-binding platform. Mtr4 has thus evolved specific structural and surface features to perform its multiple functions.

Structural analysis reveals the characteristic features of Mtr4, a DExH helicase involved in nuclear RNA processing and surveillance.,Weir JR, Bonneau F, Hentschel J, Conti E Proc Natl Acad Sci U S A. 2010 Jun 21. PMID:20566885^[2]

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

References

↑ Vanacova S, Wolf J, Martin G, Blank D, Dettwiler S, Friedlein A, Langen H, Keith G, Keller W. A new yeast poly(A) polymerase complex involved in RNA quality control. PLoS Biol. 2005 Jun;3(6):e189. Epub 2005 Apr 19. PMID:15828860 doi:http://dx.doi.org/05-PLBI-RA-0095R2
↑ Weir JR, Bonneau F, Hentschel J, Conti E. Structural analysis reveals the characteristic features of Mtr4, a DExH helicase involved in nuclear RNA processing and surveillance. Proc Natl Acad Sci U S A. 2010 Jun 21. PMID:20566885

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2xgj"

@@ Line 3: / Line 3: @@
 <StructureSection load='2xgj' size='340' side='right'caption='[[2xgj]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2xgj]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2XGJ OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=2XGJ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2xgj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2XGJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2XGJ FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=2xgj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xgj OCA], [http://pdbe.org/2xgj PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2xgj RCSB], [http://www.ebi.ac.uk/pdbsum/2xgj PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2xgj ProSAT]</span></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=2xgj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xgj OCA], [https://pdbe.org/2xgj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2xgj RCSB], [https://www.ebi.ac.uk/pdbsum/2xgj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2xgj ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/MTR4_YEAST MTR4_YEAST]] ATP-dependent RNA helicase required for the 3'-end formation of 5.8S RNA. Cofactor for the exosome complex that unwinds secondary structure in pre-rRNA. Required for nucleocytoplasmic transport of mRNA. May serve as a chaperone which translocates or normalizes the structure of mRNAs in preparation for export. Component of the TRAMP complex which has a poly(A) RNA polymerase activity and is involved in a post-transcriptional quality control mechanism limiting inappropriate expression of genetic information. Polyadenylation is required for the degradative activity of the exosome on several of its nuclear RNA substrates.<ref>PMID:15828860</ref>
+[[https://www.uniprot.org/uniprot/MTR4_YEAST MTR4_YEAST]] ATP-dependent RNA helicase required for the 3'-end formation of 5.8S RNA. Cofactor for the exosome complex that unwinds secondary structure in pre-rRNA. Required for nucleocytoplasmic transport of mRNA. May serve as a chaperone which translocates or normalizes the structure of mRNAs in preparation for export. Component of the TRAMP complex which has a poly(A) RNA polymerase activity and is involved in a post-transcriptional quality control mechanism limiting inappropriate expression of genetic information. Polyadenylation is required for the degradative activity of the exosome on several of its nuclear RNA substrates.<ref>PMID:15828860</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

2xgj

From Proteopedia

Revision as of 10:52, 13 April 2022

Structure of Mtr4, a DExH helicase involved in nuclear RNA processing and surveillance

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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