Reconstitution of CPSF active in polyadenylation: recognition of the polyadenylation signal by WDR33

Schönemann, Lars and Kühn, Uwe and Martin, Georges and Schäfer, Peter and Gruber, Andreas R. and Keller, Walter and Zavolan, Mihaela and Wahle, Elmar. (2014) Reconstitution of CPSF active in polyadenylation: recognition of the polyadenylation signal by WDR33. Genes & development, Vol. 28. pp. 2381-2393.

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Official URL: http://edoc.unibas.ch/dok/A6308506

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Cleavage and polyadenylation specificity factor (CPSF) is the central component of the 3' processing machinery for polyadenylated mRNAs in metazoans: CPSF recognizes the polyadenylation signal AAUAAA, providing sequence specificity in both pre-mRNA cleavage and polyadenylation, and catalyzes pre-mRNA cleavage. Here we show that of the seven polypeptides that have been proposed to constitute CPSF, only four (CPSF160, CPSF30, hFip1, and WDR33) are necessary and sufficient to reconstitute a CPSF subcomplex active in AAUAAA-dependent polyadenylation, whereas CPSF100, CPSF73, and symplekin are dispensable. WDR33 is required for binding of reconstituted CPSF to AAUAAA-containing RNA and can be specifically UV cross-linked to such RNAs, as can CPSF30. Transcriptome-wide identification of WDR33 targets by photoactivatable ribonucleoside-enhanced cross-linking and immunoprecipitation (PAR-CLIP) showed that WDR33 binds in and very close to the AAUAAA signal in vivo with high specificity. Thus, our data indicate that the large CPSF subunit participating in recognition of the polyadenylation signal is WDR33 and not CPSF160, as suggested by previous studies.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Computational & Systems Biology > Bioinformatics (Zavolan)
UniBasel Contributors:Zavolan, Mihaela and Martin, Georges and Gruber, Andreas R. and Keller, Walter
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Cold Spring Harbor Laboratory
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:31 Dec 2015 10:56
Deposited On:05 Dec 2014 09:45

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