Design and assembly of a chemically switchable and fluorescently traceable light-driven proton pump system for bionanotechnological applications.

Hirschi, Stephan; Fischer, Nathalie; Kalbermatter, David; Laskowski, P R; Ucurum, Zöhre; Müller, D J; Fotiadis, Dimitrios (2019). Design and assembly of a chemically switchable and fluorescently traceable light-driven proton pump system for bionanotechnological applications. Scientific reports, 9(1), p. 1046. Springer Nature 10.1038/s41598-018-37260-9

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Energy-supplying modules are essential building blocks for the assembly of functional multicomponent nanoreactors in synthetic biology. Proteorhodopsin, a light-driven proton pump, is an ideal candidate to provide the required energy in form of an electrochemical proton gradient. Here we present an advanced proteoliposome system equipped with a chemically on-off switchable proteorhodopsin variant. The proton pump was engineered to optimize the specificity and efficiency of chemical deactivation and reactivation. To optically track and characterize the proteoliposome system using fluorescence microscopy and nanoparticle tracking analysis, fluorescenlty labelled lipids were implemented. Fluorescence is a highly valuable feature that enables detection and tracking of nanoreactors in complex media. Cryo-transmission electron microscopy, and correlative atomic force and confocal microscopy revealed that our procedure yields polylamellar proteoliposomes, which exhibit enhanced mechanical stability. The combination of these features makes the presented energizing system a promising foundation for the engineering of complex nanoreactors.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Biochemistry and Molecular Medicine

UniBE Contributor:

Hirschi, Stephan; Fischer, Nathalie; Kalbermatter, David; Ucurum Fotiadis, Zöhre and Fotiadis, Dimitrios José

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

2045-2322

Publisher:

Springer Nature

Language:

English

Submitter:

Barbara Järmann-Bangerter

Date Deposited:

26 Sep 2019 09:59

Last Modified:

22 Oct 2019 22:37

Publisher DOI:

10.1038/s41598-018-37260-9

PubMed ID:

30705382

BORIS DOI:

10.7892/boris.133486

URI:

https://boris.unibe.ch/id/eprint/133486

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