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Updated: May 18, 2026
Real-Time Monitoring of Aurora kinase A Activation using Conformational FRET Biosensors in Live Cells
Published on: July 30, 2020
Development of a fluorescence intensity assay for the mitotic serine/threonine protein kinase Aurora-A
Andrew F Slatter1, Spencer Campbell, Richard M Angell
1Population Genetics, Cambridge, UK.
Abstract:
The Aurora kinases are a group of serine/threonine protein kinases that regulate key steps during mitosis, and deregulation of these proteins (e.g., by gene amplification or overexpression) has been linked to a wide variety of tumor types. Thus, Aurora-A and Aurora-B have been intensely studied as targets for anticancer therapy and are now clinically validated targets. Here we report on the development of a novel fluorescence intensity binding assay for Aurora-A kinase inhibitors using a fluorescently labeled probe compound that shows intramolecular quenching when unbound but exhibits a dramatic increase in fluorescence when bound to Aurora-A.
Insights
Researchers developed a new fluorescence assay to find inhibitors for Aurora-A kinase, a key target in cancer therapy. This assay detects inhibitors by measuring a fluorescent signal change when they bind to Aurora-A.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Aurora kinases are crucial serine/threonine protein kinases regulating mitosis.
- Their deregulation, through gene amplification or overexpression, is implicated in various cancers.
- Aurora-A and Aurora-B are validated targets for anticancer drug development.
Purpose of the Study:
- To develop a novel fluorescence intensity binding assay for identifying Aurora-A kinase inhibitors.
- To utilize a specifically designed fluorescent probe for detecting inhibitor binding.
Main Methods:
- Development of a fluorescence intensity binding assay.
- Utilized a fluorescently labeled probe compound exhibiting intramolecular quenching.
- Measured fluorescence increase upon probe binding to Aurora-A kinase.
Main Results:
- The assay demonstrated a significant increase in fluorescence upon probe binding to Aurora-A.
- This assay is suitable for screening and characterizing Aurora-A kinase inhibitors.
- The probe's fluorescence is quenched when unbound and enhanced when bound.
Conclusions:
- A novel and sensitive fluorescence assay for Aurora-A kinase inhibitors has been successfully developed.
- This assay provides a valuable tool for anticancer drug discovery targeting Aurora-A.
- The assay leverages a unique fluorescent probe for efficient inhibitor detection.
