Abstract
This review provides a brief description of the structure and transport function of the recently discovered family of retinal-containing Na+-translocating rhodopsins. The main emphasis is put on the kinetics of generation of electric potential difference in the membrane during a single transporter turnover. According to the proposed transport mechanism of Na+-rhodopsin, the driving force for the Na+ translocation from the cytoplasm is the local electric field created by the H+ movement from the Schiff base.
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Abbreviations
- bR:
-
bacteriorhodopsin
- hR:
-
halorhodopsin
- NaR:
-
Na+-translocating rhodopsin
- SB:
-
Schiff base
- ΔΨ:
-
transmembrane difference in electric potentials
- Δp :
-
proton motive force
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This work was supported by the Ministry of Science and Higher Education of the Russian Federation, Agreement no. 075-15-2021-1354 from October 7, 2021.
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A. V. Bogachev and A. A. Baykov wrote the paper, Y. V. Bertsova and M. D. Mamedov prepared figures and participated in discussion. All authors read and approved the final version of the paper.
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Bogachev, A.V., Baykov, A.A., Bertsova, Y.V. et al. Mechanism of Ion Translocation by Na+-Rhodopsin. Biochemistry Moscow 87, 731–741 (2022). https://doi.org/10.1134/S0006297922080053
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DOI: https://doi.org/10.1134/S0006297922080053