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Proton Logic Gate Based on a Gramicidin-ATP Synthase Integrated Biotransducer
Yukun Chen1, Gábor Méhes1, Bingfu Liu1
1Graduate School of Information, Production and Systems, Waseda University, 2-7 Hibikino, Wakamatu, Kitakyushu 808-0135, Fukuoka, Japan.
ACS Applied Materials & Interfaces
|January 31, 2024
Summary
Researchers developed a novel hybrid biotransducer using ATP synthase and gramicidin A (gA) proton channels. This bioiontronics system controls ion transport for advanced biological and medical applications.
Area of Science:
- Bioiontronics
- Molecular Engineering
- Biophysics
Background:
- Ion channels are crucial membrane proteins for biological signal transmission.
- Existing biodevices lack integrated bidirectional signal transmission and control through supported lipid bilayers (SLBs).
Purpose of the Study:
- To develop a hybrid biotransducer integrating ATP synthase and gramicidin A (gA) proton channels.
- To control ion transport using electrical and chemical signals for biofunctional modulation.
Main Methods:
- Fabrication of a hybrid biotransducer with ATP synthase and gA within SLBs on microelectrodes.
- Utilizing sulfonated polyaniline (SPA) for electrical control of proton transport.
- Employing chemical signals (calcium ions, EDTA) to modulate gA channel activity.
Main Results:
- Demonstrated controlled proton transport across gA channels via electrical and chemical stimuli.
- Achieved an integrated biotransducer where proton current is regulated by adenosine diphosphate and calcium ions.
- Constructed an XOR logic gate demonstrating enzymatic logic with controlled ion flux.
Conclusions:
- Successfully combined gA, ATP synthase, and SPA into a hybrid bioiontronics system.
- Enabled control over bidirectional and unidirectional ion transport across SLBs in biotransducers.
- Highlighted potential for advanced biological and medical applications through novel bioelectronic interfaces.
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