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==Crystal structure of Brr2 in complex with the Jab1/MPN domain of Prp8== | |||
=== | <StructureSection load='4bgd' size='340' side='right' caption='[[4bgd]], [[Resolution|resolution]] 3.10Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4bgd]] is a 2 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=4BGD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4BGD 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>, <scene name='pdbligand=PE5:3,6,9,12,15,18,21,24-OCTAOXAHEXACOSAN-1-OL'>PE5</scene></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=4bgd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bgd OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4bgd RCSB], [http://www.ebi.ac.uk/pdbsum/4bgd 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> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The U5 small nuclear ribonucleoprotein particle (snRNP) helicase Brr2 disrupts the U4/U6 small nuclear RNA (snRNA) duplex and allows U6 snRNA to engage in an intricate RNA network at the active center of the spliceosome. Here, we present the structure of yeast Brr2 in complex with the Jab1/MPN domain of Prp8, which stimulates Brr2 activity. Contrary to previous reports, our crystal structure and mutagenesis data show that the Jab1/MPN domain binds exclusively to the N-terminal helicase cassette. The residues in the Jab1/MPN domain, whose mutations in human Prp8 cause the degenerative eye disease retinitis pigmentosa, are found at or near the interface with Brr2, clarifying its molecular pathology. In the cytoplasm, Prp8 forms a precursor complex with U5 snRNA, seven Sm proteins, Snu114, and Aar2, but after nuclear import, Brr2 replaces Aar2 to form mature U5 snRNP. Our structure explains why Aar2 and Brr2 are mutually exclusive and provides important insights into the assembly of U5 snRNP. | |||
Structural Basis of Brr2-Prp8 Interactions and Implications for U5 snRNP Biogenesis and the Spliceosome Active Site.,Nguyen TH, Li J, Galej WP, Oshikane H, Newman AJ, Nagai K Structure. 2013 May 29. pii: S0969-2126(13)00129-9. doi:, 10.1016/j.str.2013.04.017. PMID:23727230<ref>PMID:23727230</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== | ==See Also== | ||
*[[Brr2|Brr2]] | |||
*[[Helicase|Helicase]] | |||
*[[Pre-mRNA-splicing factor|Pre-mRNA-splicing factor]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: RNA helicase]] | [[Category: RNA helicase]] | ||
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
[[Category: Li, J | [[Category: Li, J]] | ||
[[Category: Nagai, K | [[Category: Nagai, K]] | ||
[[Category: Nguyen, T H.D | [[Category: Nguyen, T H.D]] | ||
[[Category: Retinitis pigmentosa]] | [[Category: Retinitis pigmentosa]] | ||
[[Category: Rna helicase]] | [[Category: Rna helicase]] | ||
Revision as of 19:19, 24 December 2014
Crystal structure of Brr2 in complex with the Jab1/MPN domain of Prp8Crystal structure of Brr2 in complex with the Jab1/MPN domain of Prp8
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] Publication Abstract from PubMedThe U5 small nuclear ribonucleoprotein particle (snRNP) helicase Brr2 disrupts the U4/U6 small nuclear RNA (snRNA) duplex and allows U6 snRNA to engage in an intricate RNA network at the active center of the spliceosome. Here, we present the structure of yeast Brr2 in complex with the Jab1/MPN domain of Prp8, which stimulates Brr2 activity. Contrary to previous reports, our crystal structure and mutagenesis data show that the Jab1/MPN domain binds exclusively to the N-terminal helicase cassette. The residues in the Jab1/MPN domain, whose mutations in human Prp8 cause the degenerative eye disease retinitis pigmentosa, are found at or near the interface with Brr2, clarifying its molecular pathology. In the cytoplasm, Prp8 forms a precursor complex with U5 snRNA, seven Sm proteins, Snu114, and Aar2, but after nuclear import, Brr2 replaces Aar2 to form mature U5 snRNP. Our structure explains why Aar2 and Brr2 are mutually exclusive and provides important insights into the assembly of U5 snRNP. Structural Basis of Brr2-Prp8 Interactions and Implications for U5 snRNP Biogenesis and the Spliceosome Active Site.,Nguyen TH, Li J, Galej WP, Oshikane H, Newman AJ, Nagai K Structure. 2013 May 29. pii: S0969-2126(13)00129-9. doi:, 10.1016/j.str.2013.04.017. PMID:23727230[5] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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