View source for 4kit

==Crystal structure of human Brr2 in complex with the Prp8 Jab1/MPN domain==
<StructureSection load='4kit' size='340' side='right' caption='[[4kit]], [[Resolution|resolution]] 3.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4kit]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KIT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4KIT FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SNRNP200, ASCC3L1, HELIC2, KIAA0788 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), PRPF8, PRPC8 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/RNA_helicase RNA helicase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.4.13 3.6.4.13] </span></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=4kit FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4kit OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4kit RCSB], [http://www.ebi.ac.uk/pdbsum/4kit PDBsum]</span></td></tr>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/U520_HUMAN U520_HUMAN]] Retinitis pigmentosa. Retinitis pigmentosa 33 (RP33) [MIM:[http://omim.org/entry/610359 610359]]: A retinal dystrophy belonging to the group of pigmentary retinopathies. Retinitis pigmentosa is characterized by retinal pigment deposits visible on fundus examination and primary loss of rod photoreceptor cells followed by secondary loss of cone photoreceptors. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. Note=The disease is caused by mutations affecting the gene represented in this entry.<ref>PMID:16723661</ref> <ref>PMID:23045696</ref> <ref>PMID:19878916</ref> <ref>PMID:19710410</ref> <ref>PMID:21618346</ref>  [[http://www.uniprot.org/uniprot/PRP8_HUMAN PRP8_HUMAN]] Defects in PRPF8 are the cause of retinitis pigmentosa type 13 (RP13) [MIM:[http://omim.org/entry/600059 600059]]. RP leads to degeneration of retinal photoreceptor cells. Patients typically have night vision blindness and loss of midperipheral visual field. As their condition progresses, they lose their far peripheral visual field and eventually central vision as well. RP13 inheritance is autosomal dominant.<ref>PMID:17317632</ref> <ref>PMID:11468273</ref> [:]<ref>PMID:11910553</ref> <ref>PMID:12714658</ref>  
== Function ==
[[http://www.uniprot.org/uniprot/U520_HUMAN U520_HUMAN]] RNA helicase that plays an essential role in pre-mRNA splicing as component of the U5 snRNP and U4/U6-U5 tri-snRNP complexes. Involved in spliceosome assembly, activation and disassembly. Mediates changes in the dynamic network of RNA-RNA interactions in the spliceosome. Catalyzes the ATP-dependent unwinding of U4/U6 RNA duplices, an essential step in the assembly of a catalytically active spliceosome.<ref>PMID:16723661</ref> <ref>PMID:8670905</ref> <ref>PMID:9539711</ref> <ref>PMID:23045696</ref>  [[http://www.uniprot.org/uniprot/PRP8_HUMAN PRP8_HUMAN]] Central component of the spliceosome, which may play a role in aligning the pre-mRNA 5'- and 3'-exons for ligation. Interacts with U5 snRNA, and with pre-mRNA 5'-splice sites in B spliceosomes and 3'-splice sites in C spliceosomes. 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The Ski2-like RNA helicase Brr2 is a core component of the spliceosome that must be tightly regulated to ensure correct timing of spliceosome activation. Little is known about mechanisms of regulation of Ski2-like helicases by protein cofactors. Here, we show by crystal structure and biochemical analyses that the Prp8 protein, a major regulator of the spliceosome, can insert its C-terminal tail into Brr2's RNA-binding tunnel, thereby intermittently blocking Brr2's RNA binding, ATPase and U4/U6 unwinding activities. Inefficient Brr2 repression is the only recognizable phenotype associated with certain retinitis pigmentosa-linked Prp8 mutations that map to its C-terminal tail. Our data show how a Ski2-like RNA helicase can be reversibly inhibited by a protein cofactor that directly competes with RNA substrate binding.

Inhibition of RNA Helicase Brr2 by the C-Terminal Tail of the Spliceosomal Protein Prp8.,Mozaffari-Jovin S, Wandersleben T, Santos KF, Will CL, Luhrmann R, Wahl MC Science. 2013 May 23. PMID:23704370<ref>PMID:23704370</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[Pre-mRNA-splicing factor|Pre-mRNA-splicing factor]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: RNA helicase]]
[[Category: Santos, K F]]
[[Category: Wahl, M C]]
[[Category: Wandersleben, T]]
[[Category: Atp binding]]
[[Category: Jab1/mpn domain]]
[[Category: Pre-mrna splicing]]
[[Category: Reca domain]]
[[Category: Rna binding]]
[[Category: Rna binding protein]]
[[Category: Sec63 unit]]
[[Category: Ubiquitin binding]]
[[Category: Winged helix domain]]