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Updated: Aug 5, 2026
13:07
One-channel Cell-attached Patch-clamp Recording
Published on: June 9, 2014
Locking the TMEM16A chloride channel into its conductive state
1School of Life Sciences, Nanjing Medical University , Changzhou, China.
The Journal of General Physiology
|July 30, 2026
Summary
A hydrophobic patch connecting TM4 remodeling to TMEM16A channel gating was identified. This finding helps explain the divergence within the TMEM16 protein family.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- The TMEM16 family comprises essential ion channels and lipid scramblases.
- Understanding the structural basis of TMEM16A channel gating is crucial for its function.
- The TMEM16 family exhibits significant functional and structural diversity.
Purpose of the Study:
- To elucidate the structural mechanism coupling TM4 remodeling to TMEM16A channel gating.
- To investigate the role of a specific hydrophobic patch in channel function.
- To gain insights into the evolutionary divergence of the TMEM16 family.
Main Methods:
- X-ray crystallography
- Biochemical assays
- Mutagenesis studies
Main Results:
- A TM3-TM4 hydrophobic patch was identified as a key structural element.
- This patch directly links TM4 conformational changes to TMEM16A channel gating.
- Mutations in the hydrophobic patch disrupt channel function.
Conclusions:
- The TM3-TM4 hydrophobic patch is essential for TMEM16A channel gating.
- This structural feature provides a mechanism for TM4 remodeling.
- The findings shed light on TMEM16 family divergence and evolution.
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