A Palladium-Binding Deltarhodopsin for Light-Activated Conversion of Protonic to Electronic Currents

Jessica Soto-Rodríguez; Zahra Hemmatian; Erik E Josberger; Marco Rolandi; François Baneyx

doi:10.1002/adma.201600222

A Palladium-Binding Deltarhodopsin for Light-Activated Conversion of Protonic to Electronic Currents

Adv Mater. 2016 Aug;28(31):6581-5. doi: 10.1002/adma.201600222. Epub 2016 May 17.

Authors

Jessica Soto-Rodríguez¹, Zahra Hemmatian^{2

3}, Erik E Josberger^{2

4}, Marco Rolandi^{2

3}, François Baneyx¹

Affiliations

¹ Department of Chemical Engineering, University of Washington, Seattle, WA, 98195, USA.
² Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.
³ Department of Electrical Engineering, University of California, Santa Cruz, Santa Cruz, CA, 95064, USA.
⁴ Department of Electrical Engineering, University of Washington, Seattle, WA, 98195, USA.

PMID: 27185384
DOI: 10.1002/adma.201600222

Abstract

Fusion of a palladium-binding peptide to an archaeal rhodopsin promotes intimate integration of the lipid-embedded membrane protein with a palladium hydride protonic contact. Devices fabricated with the palladium-binding deltarhodopsin enable light-activated conversion of protonic currents to electronic currents with on/off responses complete in seconds and a nearly tenfold increase in electrical signal relative to those made with the wild-type protein.

Keywords: bioelectronics; bioprotonics; ion transport; rhodopsin; solid binding peptide.