Reference: Calvo O and Manley JL (2001) Evolutionarily conserved interaction between CstF-64 and PC4 links transcription, polyadenylation, and termination. Mol Cell 7(5):1013-23

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Abstract


Tight connections exist between transcription and subsequent processing of mRNA precursors, and interactions between the transcription and polyadenylation machineries seem especially extensive. Using a yeast two-hybrid screen to identify factors that interact with the polyadenylation factor CstF-64, we uncovered an interaction with the transcriptional coactivator PC4. Both human proteins have yeast homologs, Rna15p and Sub1p, respectively, and we show that these two proteins also interact. Given evidence that certain polyadenylation factors, including Rna15p, are necessary for termination in yeast, we show that deletion or overexpression of SUB1 suppresses or enhances, respectively, both growth and termination defects detected in an rna15 mutant strain. Our findings provide an additional, unexpected connection between transcription and polyadenylation and suggest that PC4/Sub1p, via its interaction with CstF-64/Rna15p, possesses an evolutionarily conserved antitermination activity.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
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Calvo O, Manley JL
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