Na Binding and Transport: Insights from Light-Driven Na-Pumping Rhodopsin
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Na plays a vital role in numerous physiological processes across humans and animals, necessitating a comprehensive understanding of Na transmembrane transport. Among the various Na pumps and channels, light-driven Na-pumping rhodopsin (NaR) has emerged as a noteworthy model in this field. This review offers a concise overview of the structural and functional studies conducted on NaR, encompassing ground/intermediate-state structures and photocycle kinetics. The primary focus lies in addressing key inquiries: (1) unraveling the translocation pathway of Na; (2) examining the role of structural changes within the photocycle, particularly in the O state, in facilitating Na transport; and (3) investigating the timing of Na uptake/release. By delving into these unresolved issues and existing debates, this review aims to shed light on the future direction of Na pump research.
Light Control in Microbial Systems.
Elahi Y, Baker M Int J Mol Sci. 2024; 25(7).
PMID: 38612810 PMC: 11011852. DOI: 10.3390/ijms25074001.