3sbt: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==Crystal structure of a Aar2-Prp8 complex== | ==Crystal structure of a Aar2-Prp8 complex== | ||
<StructureSection load='3sbt' size='340' side='right' caption='[[3sbt]], [[Resolution|resolution]] 1.80Å' scene=''> | <StructureSection load='3sbt' size='340' side='right'caption='[[3sbt]], [[Resolution|resolution]] 1.80Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3sbt]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3sbt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. 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> | ||
</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> | </td></tr><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> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3e9o|3e9o]], [[3sbs|3sbs]], [[3sbg|3sbg]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3e9o|3e9o]], [[3sbs|3sbs]], [[3sbg|3sbg]]</div></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DBF3, DNA39, PRP8, RNA8, SLT21, USA2, YHR165C ([ | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DBF3, DNA39, PRP8, RNA8, SLT21, USA2, YHR165C ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast]), AAR2, YBL06.06, YBL0611, YBL074C ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <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> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[[ | [[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> [[https://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;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 22: | Line 22: | ||
==See Also== | ==See Also== | ||
*[[Pre-mRNA | *[[Pre-mRNA splicing factors 3D structures|Pre-mRNA splicing factors 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 28: | Line 28: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Baker's yeast]] | [[Category: Baker's yeast]] | ||
[[Category: Large Structures]] | |||
[[Category: Holton, N]] | [[Category: Holton, N]] | ||
[[Category: Santos, K F]] | [[Category: Santos, K F]] | ||
Revision as of 10:50, 29 June 2022
Crystal structure of a Aar2-Prp8 complexCrystal structure of a Aar2-Prp8 complex
Structural highlights
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 PubMedLittle 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. See AlsoReferences
|
| ||||||||||||||||||||