» Articles » PMID: 37894614

Na Binding and Transport: Insights from Light-Driven Na-Pumping Rhodopsin

Overview
Journal Molecules
Publisher MDPI
Specialty Biology
Date 2023 Oct 28
PMID 37894614
Authors
Affiliations
Soon will be listed here.
Abstract

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.

Citing Articles

Light Control in Microbial Systems.

Elahi Y, Baker M Int J Mol Sci. 2024; 25(7).

PMID: 38612810 PMC: 11011852. DOI: 10.3390/ijms25074001.

References
1.
Garczarek F, Gerwert K . Functional waters in intraprotein proton transfer monitored by FTIR difference spectroscopy. Nature. 2005; 439(7072):109-12. DOI: 10.1038/nature04231. View

2.
Skopintsev P, Ehrenberg D, Weinert T, James D, Kar R, Johnson P . Femtosecond-to-millisecond structural changes in a light-driven sodium pump. Nature. 2020; 583(7815):314-318. DOI: 10.1038/s41586-020-2307-8. View

3.
Abe-Yoshizumi R, Inoue K, Kato H, Nureki O, Kandori H . Role of Asn112 in a Light-Driven Sodium Ion-Pumping Rhodopsin. Biochemistry. 2016; 55(41):5790-5797. DOI: 10.1021/acs.biochem.6b00741. View

4.
Brown L, Ernst O . Recent advances in biophysical studies of rhodopsins - Oligomerization, folding, and structure. Biochim Biophys Acta Proteins Proteom. 2017; 1865(11 Pt B):1512-1521. DOI: 10.1016/j.bbapap.2017.08.007. View

5.
Nakamizo Y, Fujisawa T, Kikukawa T, Okamura A, Baba H, Unno M . Low-temperature Raman spectroscopy of sodium-pump rhodopsin from : insight of Na binding for active Na transport. Phys Chem Chem Phys. 2021; 23(3):2072-2079. DOI: 10.1039/d0cp05652a. View