Analysis of in situ pre-mRNA targets of human splicing factor SF1 reveals a function in alternative splicing

Corioni, M. and Antih, N. and Tanackovic, G. and Zavolan, M. and Kramer, A.. (2011) Analysis of in situ pre-mRNA targets of human splicing factor SF1 reveals a function in alternative splicing. Nucleic Acids Research, 39 (5). pp. 1868-1879.

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Official URL: http://edoc.unibas.ch/dok/A5842479

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The conserved pre-mRNA splicing factor SF1 is implicated in 3` splice site recognition by binding directly to the intron branch site. However, because SF1 is not essential for constitutive splicing, its role in pre-mRNA processing has remained mysterious. Here, we used crosslinking and immunoprecipitation (CLIP) to analyze short RNAs directly bound by human SF1 in vivo. SF1 bound mainly pre-mRNAs, with 77% of target sites in introns. Binding to target RNAs in vitro was dependent on the newly defined SF1 binding motif ACUNAC, strongly resembling human branch sites. Surprisingly, the majority of SF1 binding sites did not map to the expected position near 3` splice sites. Instead, target sites were distributed throughout introns, and a smaller but significant fraction occurred in exons within coding and untranslated regions. These data suggest a more complex role for SF1 in splicing regulation. Indeed, SF1 silencing affected alternative splicing of endogenous transcripts, establishing a previously unexpected role for SF1 and branch site-like sequences in splice site selection.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Computational & Systems Biology > Bioinformatics (Zavolan)
UniBasel Contributors:Zavolan, Mihaela
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Oxford University Press
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Oct 2017 08:48
Deposited On:14 Sep 2012 06:38

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