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Updated: Jun 21, 2026
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An Optimized Single-Molecule Pull-Down Assay for Quantification of Protein Phosphorylation
Published on: June 6, 2022
Interrogation of phosphor-specific interaction on a high-throughput label-free optical biosensor system-Epic system
Meng Wu1, Shunyou Long, Anthony G Frutos
1Department of Neuroscience, High Throughput Biology Center and Johns Hopkins Ion Channel Center, Johns Hopkins University, School of Medicine, Baltimore, Maryland 21205, USA.
Journal of Receptor and Signal Transduction Research
|July 31, 2009
Summary
The Epic system enables high-throughput analysis of 14-3-3 protein interactions and substrate kinases. This biosensor technology aids in biomarker discovery and diagnostics.
Area of Science:
- Biochemistry
- Biosensing Technology
- Molecular Interactions
Background:
- The 14-3-3 protein family plays crucial roles in various cellular signaling pathways.
- Understanding the specific interactions between 14-3-3 proteins and their substrates is vital for deciphering cellular functions.
- Current methods for characterizing these interactions can be limited in throughput and scope.
Purpose of the Study:
- To apply the Epic system, a label-free optical biosensor, for high-throughput biochemical interrogation of phosphor-specific interactions involving 14-3-3 proteins.
- To characterize the binding rank and affinity of 14-3-3 protein-substrate interactions.
- To explore potential kinases responsible for phosphorylating 14-3-3 substrates.
Main Methods:
- Utilized the Epic system, a high-throughput label-free optical biosensor.
- Performed biochemical assays to analyze phosphor-specific interactions.
- Quantified binding rank and affinity of protein interactions.
- Investigated kinase-substrate relationships for 14-3-3 proteins.
Main Results:
- Demonstrated the Epic system's capability for high-throughput characterization of 14-3-3 protein and substrate binding.
- Successfully determined binding rank and affinity for multiple interactions.
- Identified potential interacting kinases for various substrates.
- Showcased the system's versatility in biochemical analysis.
Conclusions:
- The Epic system is a powerful tool for high-throughput analysis of 14-3-3 protein interactions.
- This technology facilitates biomarker discovery and diagnostic applications.
- The system's capabilities extend to cell-based studies, including receptor and viral infection characterization.
