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Updated: Jul 20, 2025

10:03
Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
Published on: June 27, 2014
18.0K
Voltage Imaging with Engineered Proton-Pumping Rhodopsins: Insights from the Proton Transfer Pathway
Xin Meng1, Srividya Ganapathy1,2, Lars van Roemburg1
1Department of Imaging Physics, Delft University of Technology, 2628 CJ Delft, The Netherlands.
ACS Physical Chemistry Au
|July 31, 2023
Summary
Genetically encoded voltage indicators (GEVIs) enable neuroscience research. Microbial rhodopsin-based GEVIs offer fast, sensitive voltage imaging by leveraging unique photocycle properties.
Area of Science:
- Neuroscience
- Biophysics
- Molecular Biology
Background:
- Genetically encoded voltage indicators (GEVIs) are revolutionizing neuroscience.
- GEVI performance relies on indicator response kinetics.
- Microbial rhodopsins are a key GEVI subclass with fast kinetics and high voltage sensitivity.
Purpose of the Study:
- To review microbial rhodopsin photocycles.
- To understand voltage sensitivity mechanisms in microbial rhodopsins.
- To link photocycle properties to engineering efforts for improved GEVIs.
Main Methods:
- Review of existing literature on microbial rhodopsins and GEVIs.
- Analysis of photocycle mechanisms.
- Correlation of protein properties with voltage sensing capabilities.
Main Results:
- Microbial rhodopsin photocycles are crucial for voltage sensitivity.
- Photocycle kinetics directly impact GEVI performance.
- Understanding these mechanisms guides the development of enhanced GEVIs.
Conclusions:
- Microbial rhodopsins are promising for advanced voltage imaging.
- Further research into photocycle dynamics will yield faster, brighter, and more sensitive GEVIs.
- This review provides a framework for future GEVI engineering.
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