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Updated: Aug 13, 2026
07:49
Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods
Published on: July 17, 2019
Inactivation of Ras function by allele-specific peptide aptamers
1Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA. w-xu@ski.mskcc.org
Oncogene
|August 13, 2002
Summary
Researchers developed peptide aptamers to target specific gene variants, demonstrating their potential to inhibit oncogenic Ras signaling and control cellular pathways. This approach aids in understanding gene function and disease-related mutations.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Elucidating human gene function and polymorphic variants is a significant challenge in biology.
- Specific reagents are needed to dissect complex cellular regulatory networks.
Purpose of the Study:
- To identify peptide aptamers capable of distinguishing between allelic forms of H-Ras.
- To evaluate the utility of peptide aptamers in controlling cellular signaling pathways.
Main Methods:
- Utilized a two-bait two-hybrid system to screen for peptide aptamers.
- Tested aptamer inhibition of Ras-Raf1 interaction in vitro.
- Assessed aptamer effects on EGF-stimulated Raf1 activation in vivo.
Main Results:
- Identified peptide aptamers that specifically target allelic forms of H-Ras.
- Demonstrated that some anti-Ras aptamers inhibit Ras-Raf1 interaction in vitro.
- Showed that these aptamers abolish EGF-stimulated Raf1 activation in vivo.
Conclusions:
- Peptide aptamer inactivation of protein function is a viable strategy for understanding signaling pathways.
- This approach can be used to control oncogenic missense alleles.
- Peptide aptamers offer a novel tool for dissecting gene function and regulatory networks.
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