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Regulation of PIEZO1 channel force sensitivity by interblade handshaking
Katie A Smith1, Eulashini Chuntharpursat-Bon1, Oleksandr V Povstyan1
1Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, LS2 9JT, UK.
Science Advances
|June 13, 2025
Summary
PIEZO channels, crucial for sensing touch, adapt to different contexts via an interblade handshake. This interaction, involving lipids and amino acids, regulates the channel’s sensitivity to mechanical forces.
Area of Science:
- Biophysics
- Molecular Biology
- Cell Biology
Background:
- PIEZO channels are essential mechanosensitive ion channels.
- Their regulation for context-specific force adaptation remains unclear.
Purpose of the Study:
- To investigate the regulatory mechanisms of human PIEZO1 channel force sensitivity.
- To elucidate the role of interblade interactions in PIEZO1 function.
Main Methods:
- Coarse-grained and all-atom molecular dynamics simulations of human PIEZO1.
- Experimental disruption of identified interactions.
- Structural and sequence analysis across PIEZO homologs.
Main Results:
- An interblade handshake interaction involving basic amino acids and phosphatidylinositol 4,5-bisphosphate was identified.
- This interaction dictates the channel's resting state, blade conformation, and pore structure.
- Disrupting the handshake increased channel sensitivity to membrane tension.
Conclusions:
- A dynamic interblade handshake mechanism regulates PIEZO channel force sensitivity.
- This interaction allows PIEZO channels to adapt their mechanical response.
- Findings provide insights into PIEZO channel regulation and mechanotransduction.
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