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Published on: November 11, 2016
Discovery of Drug-like Inhibitors of the Human Caf1/CNOT7 poly(A)-Selective Nuclease Using Compound Screening
Ishwinder Kaur1, Lubna Hashmi1, Peter M Fischer1
1School of Pharmacy, Biodiscovery Institute, University of Nottingham, University Park, Nottingham NG7 2RD, UK.
Biomolecules
|November 27, 2025
Summary
Researchers identified 15 chemical compounds that inhibit the Caf1/CNOT7 enzyme, crucial for mRNA degradation. These inhibitors may help distinguish the enzyme's catalytic and structural roles in gene regulation.
Area of Science:
- Molecular Biology
- Biochemistry
- Drug Discovery
Background:
- The Ccr4-Not complex regulates gene expression post-transcriptionally.
- It impacts translation and mRNA degradation via poly(A)-tail shortening.
- The Caf1 nuclease (CNOT7/CNOT8) is a key subunit with catalytic and structural functions.
Purpose of the Study:
- To identify inhibitors of the Caf1/CNOT7 enzyme's enzymatic activity.
- To provide tools for investigating Caf1/CNOT7's roles.
- To develop starting points for more potent inhibitors.
Main Methods:
- Screened 10,880 chemically diverse compounds using a fluorescence-based biochemical assay.
- Identified inhibitors with biochemical IC50 values below 25 μM.
- Utilized molecular docking to predict binding modes.
Main Results:
- Discovered 15 compounds that inhibit Caf1/CNOT7 activity.
- Achieved IC50 values under 25 μM for these inhibitors.
- Explored potential binding interactions through molecular docking.
Conclusions:
- The identified compounds can differentiate between catalytic and non-catalytic roles of Caf1/CNOT7.
- These inhibitors serve as valuable starting points for developing potent drugs targeting Caf1/CNOT7.
- Facilitates further research into mRNA degradation and gene regulation.
