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3sbt

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==Crystal structure of a Aar2-Prp8 complex==
==Crystal structure of a Aar2-Prp8 complex==
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<StructureSection load='3sbt' size='340' side='right' caption='[[3sbt]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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<StructureSection load='3sbt' size='340' side='right'caption='[[3sbt]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3sbt]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_s288c Saccharomyces cerevisiae s288c]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SBT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SBT FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3sbt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SBT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SBT FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PGO:S-1,2-PROPANEDIOL'>PGO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.799&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3e9o|3e9o]], [[3sbs|3sbs]], [[3sbg|3sbg]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PGO:S-1,2-PROPANEDIOL'>PGO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DBF3, DNA39, PRP8, RNA8, SLT21, USA2, YHR165C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Saccharomyces cerevisiae S288c]), AAR2, YBL06.06, YBL0611, YBL074C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Saccharomyces cerevisiae S288c])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3sbt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sbt OCA], [https://pdbe.org/3sbt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3sbt RCSB], [https://www.ebi.ac.uk/pdbsum/3sbt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3sbt ProSAT]</span></td></tr>
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<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>
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</table>
</table>
== Function ==
== Function ==
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[[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.
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[https://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>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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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.
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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<ref>PMID:21764848</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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==See Also==
==See Also==
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*[[Pre-mRNA-splicing factor|Pre-mRNA-splicing factor]]
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*[[Pre-mRNA splicing factors 3D structures|Pre-mRNA splicing factors 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Saccharomyces cerevisiae s288c]]
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[[Category: Large Structures]]
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[[Category: Holton, N]]
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[[Category: Saccharomyces cerevisiae S288C]]
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[[Category: Santos, K F]]
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[[Category: Holton N]]
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[[Category: Wahl, M C]]
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[[Category: Santos KF]]
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[[Category: Weber, G]]
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[[Category: Wahl MC]]
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[[Category: Rnaseh like domain]]
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[[Category: Weber G]]
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[[Category: Splicing]]
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[[Category: U5 snrnp assembly]]
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[[Category: Vhs like domain]]
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Current revision

Crystal structure of a Aar2-Prp8 complex

PDB ID 3sbt

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