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Potassium channel-based optogenetic silencing.

Abstract：

:Optogenetics enables manipulation of biological processes with light at high spatio-temporal resolution to control the behavior of cells, networks, or even whole animals. In contrast to the performance of excitatory rhodopsins, the effectiveness of inhibitory optogenetic tools is still insufficient. Here we report a two-component optical silencer system comprising photoactivated adenylyl cyclases (PACs) and the small cyclic nucleotide-gated potassium channel SthK. Activation of this 'PAC-K' silencer by brief pulses of low-intensity blue light causes robust and reversible silencing of cardiomyocyte excitation and neuronal firing. In vivo expression of PAC-K in mouse and zebrafish neurons is well tolerated, where blue light inhibits neuronal activity and blocks motor responses. In combination with red-light absorbing channelrhodopsins, the distinct action spectra of PACs allow independent bimodal control of neuronal activity. PAC-K represents a reliable optogenetic silencer with intrinsic amplification for sustained potassium-mediated hyperpolarization, conferring high operational light sensitivity to the cells of interest.

journal_name

Nat Commun

journal_title

Nature communications

authors

Bernal Sierra YA,Rost BR,Pofahl M,Fernandes AM,Kopton RA,Moser S,Holtkamp D,Masala N,Beed P,Tukker JJ,Oldani S,Bönigk W,Kohl P,Baier H,Schneider-Warme F,Hegemann P,Beck H,Seifert R,Schmitz D

doi

10.1038/s41467-018-07038-8

subject

Has Abstract

pub_date

2018-11-05 00:00:00

pages

4611

issue

1

issn

2041-1723

pii

10.1038/s41467-018-07038-8

journal_volume

9

pub_type

杂志文章

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