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- W2166441406 abstract "Polypyrimidine tract-binding protein (PTB) is a splicing regulator that also plays a positive role in pre-mRNA 3′ end processing when bound upstream of the polyadenylation signal (pA signal). Here, we address the mechanism of PTB stimulatory function in mRNA 3′ end formation. We identify PTB as the protein factor whose binding to the human β-globin (HBB) 3′ UTR is abrogated by a 3′ end processing-inactivating mutation. We show that PTB promotes both in vitro 3′ end cleavage and polyadenylation and recruits directly the splicing factor hnRNP H to G-rich sequences associated with several pA signals. Increased binding of hnRNP H results in stimulation of polyadenylation through a direct interaction with poly(A) polymerase. Therefore, our results provide evidence of a concerted regulation of pA signal recognition by splicing factors bound to auxiliary polyadenylation sequence elements." @default.
- W2166441406 created "2016-06-24" @default.
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- W2166441406 date "2009-06-08" @default.
- W2166441406 modified "2023-10-16" @default.
- W2166441406 title "A physical and functional link between splicing factors promotes pre-mRNA 3′ end processing" @default.
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- W2166441406 doi "https://doi.org/10.1093/nar/gkp470" @default.
- W2166441406 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2724285" @default.
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