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3sbt

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Revision as of 17:34, 25 December 2014

Crystal structure of a Aar2-Prp8 complex

Structural highlights

3sbt is a 2 chain structure with sequence from Saccharomyces cerevisiae s288c. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	3e9o, 3sbs, 3sbg
Gene:	DBF3, DNA39, PRP8, RNA8, SLT21, USA2, YHR165C (Saccharomyces cerevisiae S288c), AAR2, YBL06.06, YBL0611, YBL074C (Saccharomyces cerevisiae S288c)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[PRP8_YEAST] Required for pre-spliceosome formation, which is the first step of pre-mRNA splicing. This protein is associated with snRNP U5. Has a role in branch site-3' splice site selection. Associates with the branch site-3' splice 3'-exon region. Also has a role in cell cycle.^[1] ^[2] ^[3] ^[4] [AAR2_YEAST] Involved in splicing pre-mRNA of the A1 cistron and other genes that are important for cell growth.

Publication Abstract from PubMed

Little is known about how particle-specific proteins are assembled on spliceosomal small nuclear ribonucleoproteins (snRNPs). Brr2p is a U5 snRNP-specific RNA helicase required for spliceosome catalytic activation and disassembly. In yeast, the Aar2 protein is part of a cytoplasmic precursor U5 snRNP that lacks Brr2p and is replaced by Brr2p in the nucleus. Here we show that Aar2p and Brr2p bind to different domains in the C-terminal region of Prp8p; Aar2p interacts with the RNaseH domain, whereas Brr2p interacts with the Jab1/MPN domain. These domains are connected by a long, flexible linker, but the Aar2p-RNaseH complex sequesters the Jab1/MPN domain, thereby preventing binding by Brr2p. Aar2p is phosphorylated in vivo, and a phospho-mimetic S253E mutation in Aar2p leads to disruption of the Aar2p-Prp8p complex in favor of the Brr2p-Prp8p complex. We propose a model in which Aar2p acts as a phosphorylation-controlled U5 snRNP assembly factor that regulates the incorporation of the particle-specific Brr2p. The purpose of this regulation may be to safeguard against nonspecific RNA binding to Prp8p and/or premature activation of Brr2p activity.

Mechanism for Aar2p function as a U5 snRNP assembly factor.,Weber G, Cristao VF, Alves FD, Santos KF, Holton N, Rappsilber J, Beggs JD, Wahl MC Genes Dev. 2011 Jul 15. PMID:21764848^[5]

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

References

↑ Jackson SP, Lossky M, Beggs JD. Cloning of the RNA8 gene of Saccharomyces cerevisiae, detection of the RNA8 protein, and demonstration that it is essential for nuclear pre-mRNA splicing. Mol Cell Biol. 1988 Mar;8(3):1067-75. PMID:2835658
↑ Abovich N, Rosbash M. Cross-intron bridging interactions in the yeast commitment complex are conserved in mammals. Cell. 1997 May 2;89(3):403-12. PMID:9150140
↑ McPheeters DS, Muhlenkamp P. Spatial organization of protein-RNA interactions in the branch site-3' splice site region during pre-mRNA splicing in yeast. Mol Cell Biol. 2003 Jun;23(12):4174-86. PMID:12773561
↑ Yang K, Zhang L, Xu T, Heroux A, Zhao R. Crystal structure of the beta-finger domain of Prp8 reveals analogy to ribosomal proteins. Proc Natl Acad Sci U S A. 2008 Sep 16;105(37):13817-22. Epub 2008 Sep 8. PMID:18779563
↑ Weber G, Cristao VF, Alves FD, Santos KF, Holton N, Rappsilber J, Beggs JD, Wahl MC. Mechanism for Aar2p function as a U5 snRNP assembly factor. Genes Dev. 2011 Jul 15. PMID:21764848 doi:10.1101/gad.635911

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3sbt"

@@ Line 8: / Line 8: @@
 <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=3sbt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sbt OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3sbt RCSB], [http://www.ebi.ac.uk/pdbsum/3sbt PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/PRP8_YEAST PRP8_YEAST]] Required for pre-spliceosome formation, which is the first step of pre-mRNA splicing. This protein is associated with snRNP U5. Has a role in branch site-3' splice site selection. Associates with the branch site-3' splice 3'-exon region. Also has a role in cell cycle.<ref>PMID:2835658</ref> <ref>PMID:9150140</ref> <ref>PMID:12773561</ref> <ref>PMID:18779563</ref>  [[http://www.uniprot.org/uniprot/AAR2_YEAST AAR2_YEAST]] Involved in splicing pre-mRNA of the A1 cistron and other genes that are important for cell growth.
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==

3sbt

From Proteopedia

Revision as of 17:34, 25 December 2014

Crystal structure of a Aar2-Prp8 complex

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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