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Updated: Jun 27, 2026

Analysis of Termination of Transcription Using BrUTP-strand-specific Transcription Run-on (TRO) Approach
Published on: March 12, 2017
Evolutionarily conserved interaction between CstF-64 and PC4 links transcription, polyadenylation, and termination
1Department of Biological Sciences, Columbia University, New York, NY 10027, USA.
Researchers discovered that the transcriptional coactivator PC4 interacts with polyadenylation factor CstF-64. This interaction, conserved in yeast, suggests a role in regulating gene expression and mRNA processing.
Area of Science:
- Molecular Biology
- Gene Expression Regulation
Background:
- Transcription and mRNA processing are tightly linked.
- Interactions between transcription and polyadenylation machineries are extensive.
Purpose of the Study:
- To identify factors interacting with the polyadenylation factor CstF-64.
- To investigate the functional relationship between transcription and polyadenylation.
Main Methods:
- Yeast two-hybrid screen to identify protein interactions.
- Analysis of yeast homologs (Rna15p and Sub1p) and mutant strains.
Main Results:
- Identified an interaction between CstF-64 and transcriptional coactivator PC4.
- Demonstrated interaction between yeast homologs Rna15p and Sub1p.
- Showed that SUB1 modulates growth and termination defects in rna15 mutants.
Conclusions:
- PC4/Sub1p interacts with CstF-64/Rna15p, linking transcription and polyadenylation.
- This interaction suggests an evolutionarily conserved antitermination activity for PC4/Sub1p.
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