3sbg: Difference between revisions
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==Crystal structure of a Prp8 C-terminal fragment== | |||
=== | <StructureSection load='3sbg' size='340' side='right' caption='[[3sbg]], [[Resolution|resolution]] 3.28Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3sbg]] is a 1 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=3SBG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SBG FirstGlance]. <br> | |||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3sbs|3sbs]], [[3sbt|3sbt]]</td></tr> | |||
<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=4932 Saccharomyces cerevisiae])</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=3sbg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sbg OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3sbg RCSB], [http://www.ebi.ac.uk/pdbsum/3sbg PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== 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<ref>PMID:21764848</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Pre-mRNA-splicing factor|Pre-mRNA-splicing factor]] | *[[Pre-mRNA-splicing factor|Pre-mRNA-splicing factor]] | ||
*[[Prp8|Prp8]] | *[[Prp8|Prp8]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
[[Category: Holton, N | [[Category: Holton, N]] | ||
[[Category: Santos, K | [[Category: Santos, K]] | ||
[[Category: Wahl, M C | [[Category: Wahl, M C]] | ||
[[Category: Weber, G | [[Category: Weber, G]] | ||
[[Category: Jab1/mpn domain]] | [[Category: Jab1/mpn domain]] | ||
[[Category: Prp8p]] | [[Category: Prp8p]] | ||
[[Category: Rnaseh domain]] | [[Category: Rnaseh domain]] | ||
[[Category: Splicing]] | [[Category: Splicing]] | ||
