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  Dissection of the factor requirements for spliceosome disassembly and the elucidation of its dissociation products using a purified splicing system.

Fourmann, J. B., Schmitzova, J., Christian, H., Urlaub, H., Ficner, R., Boon, K. L., et al. (2013). Dissection of the factor requirements for spliceosome disassembly and the elucidation of its dissociation products using a purified splicing system. Genes and Development, 27(4), 413-428. doi:10.1101/gad.207779.112.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-F3B0-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-C165-D
Genre: Journal Article

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 Creators:
Fourmann, J. B.1, Author              
Schmitzova, J.1, Author              
Christian, H., Author
Urlaub, H.2, Author              
Ficner, R., Author
Boon, K. L.1, Author              
Fabrizio, P.1, Author              
Lührmann, R.1, Author              
Affiliations:
1Department of Cellular Biochemistry, MPI for biophysical chemistry, Max Planck Society, ou_578576              
2Research Group of Bioanalytical Mass Spectrometry, MPI for biophysical chemistry, Max Planck Society, ou_578613              

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Free keywords: intron-lariat spliceosome; disassembly; Prp22; Prp43; Brr2
 Abstract: The spliceosome is a single-turnover enzyme that needs to be dismantled after catalysis to both release the mRNA and recycle small nuclear ribonucleoproteins (snRNPs) for subsequent rounds of pre-mRNA splicing. The RNP remodeling events occurring during spliceosome disassembly are poorly understood, and the composition of the released snRNPs are only roughly known. Using purified components in vitro, we generated post-catalytic spliceosomes that can be dissociated into mRNA and the intron-lariat spliceosome (ILS) by addition of the RNA helicase Prp22 plus ATP and without requiring the step 2 proteins Slu7 and Prp18. Incubation of the isolated ILS with the RNA helicase Prp43 plus Ntr1/Ntr2 and ATP generates defined spliceosomal dissociation products: the intron-lariat, U6 snRNA, a 20–25S U2 snRNP containing SF3a/b, an 18S U5 snRNP, and the “nineteen complex” associated with both the released U2 snRNP and intron-lariat RNA. Our system reproduces the entire ordered disassembly phase of the spliceosome with purified components, which defines the minimum set of agents required for this process. It enabled us to characterize the proteins of the ILS by mass spectrometry and identify the ATPase action of Prp43 as necessary and sufficient for dissociation of the ILS without the involvement of Brr2 ATPase.

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Language(s): eng - English
 Dates: 2013-02-15
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1101/gad.207779.112
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Title: Genes and Development
Source Genre: Journal
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Pages: - Volume / Issue: 27 (4) Sequence Number: - Start / End Page: 413 - 428 Identifier: -