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Visualization of Calcium Decoding via a FRET-Based Reporter for Calcium-Decoder Conformation
Anja Liese1, Sarah Lederer2, Bernadette Eichstädt2
1Department for Biochemistry of Plant Interactions, Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany. anja.liese@ipb-halle.de.
Methods in Molecular Biology (Clifton, N.J.)
|February 5, 2026
Summary
Researchers developed CPKaleon, a novel reporter for visualizing calcium-dependent protein kinase (CPK) activation. This tool allows real-time monitoring of CPK conformational changes, advancing calcium signaling research.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Biology
Background:
- Calcium signaling is crucial for cellular processes.
- Visualizing calcium dynamics has advanced understanding, but calcium decoding remains challenging.
- Calcium-dependent protein kinases (CPKs) play key roles in calcium signaling pathways.
Purpose of the Study:
- To develop a reporter system for monitoring CPK activation and inactivation.
- To enable real-time visualization of conformational changes in CPKs.
- To provide detailed protocols for CPKaleon characterization and imaging.
Main Methods:
- Development of the CPKaleon reporter system.
- In vitro characterization of CPKaleon.
- In vivo imaging of CPKaleon in cellular systems.
Main Results:
- CPKaleon successfully monitors conformational changes of CPKs.
- Real-time visualization of CPK activation and inactivation is achieved.
- Detailed protocols for CPKaleon application are established.
Conclusions:
- CPKaleon is a valuable tool for studying calcium decoding.
- The reporter facilitates real-time monitoring of CPK activity in response to stimuli.
- This work provides a foundation for further investigations into CPK-mediated signaling.
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