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When a PLC-γ1-based light switch tells a cell which way to go
Jichao Sun1,2, Mo Chen3,4
1Department of Critical Care Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, China.
The Journal of Cell Biology
|May 26, 2026
Summary
Scientists engineered a light-controlled enzyme, phospholipase C-gamma 1 (PLC-γ1). Activating PLC-γ1 with light on the cell membrane directed cell migration, revealing its role in cell polarity.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Phospholipase C-gamma 1 (PLC-γ1) is a key enzyme in cellular signaling pathways.
- Understanding the precise spatiotemporal control of PLC-γ1 activity is crucial for deciphering its role in cell behavior.
- Existing methods lack the precision to rapidly and locally activate PLC-γ1 within living cells.
Purpose of the Study:
- To engineer a photoswitchable variant of PLC-γ1 for light-inducible activation.
- To investigate the role of localized PLC-γ1 activation in controlling cell migration and polarity.
- To establish PLC-γ1 as a direct instructive signal for cell polarity.
Main Methods:
- Genetic engineering to create a light-sensitive PLC-γ1 mutant.
- Optogenetic control to activate the engineered PLC-γ1 using specific wavelengths of light.
- Live-cell imaging techniques to observe cell migration and membrane dynamics.
- Biochemical assays to confirm enzyme activity upon light stimulation.
Main Results:
- The engineered light-controlled PLC-γ1 was successfully activated by illumination.
- Localized activation of PLC-γ1 at the cell membrane induced directed cell migration towards the illuminated region.
- The study demonstrated that PLC-γ1 activity directly influences the establishment of cell polarity.
- The spatiotemporal control of PLC-γ1 activity provides a novel tool for studying cell migration.
Conclusions:
- Phospholipase C-gamma 1 (PLC-γ1) can be precisely controlled using light, enabling optogenetic manipulation of cellular processes.
- Light-activated PLC-γ1 serves as an instructive signal, driving directional cell migration and establishing cell polarity.
- This engineered system offers a powerful new approach to study cell polarity and migration dynamics in real-time.
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