Structural basis for ion selectivity and engineering in channelrhodopsins.

Abstract:

:Channelrhodopsins have become an integral part of modern neuroscience approaches due to their ability to control neuronal activity in targeted cell populations. The recent determination of several channelrhodopsin X-ray structures now enables us to study their function with unprecedented molecular precision. We will discuss how these insights can guide the engineering of the ion conducting pathway to increase its selectivity for Cl-, Ca2+, and K+ ions and improve the overall conductance. Engineering such channelrhodopsins would further increase their utility in neuroscience research and beyond by controlling a wider range of physiological events. To thoroughly address this issue, we compare channelrhodopsin structures with structural features of voltage and ligand-gated K+, Cl- and Ca2+ channels and discuss how these could be implemented in channelrhodopsins.

journal_name

Curr Opin Struct Biol

authors

Rappleye M,Berndt A

doi

10.1016/j.sbi.2019.04.008

subject

Has Abstract

pub_date

2019-08-01 00:00:00

pages

176-184

eissn

0959-440X

issn

1879-033X

pii

S0959-440X(18)30143-X

journal_volume

57

pub_type

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