Electronic control of H(+) current in a bioprotonic device with Gramicidin A and Alamethicin.
Electronic control of H(+) current in a bioprotonic device with Gramicidin A and Alamethicin.
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DOI:
10.1038/ncomms12981
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发表时间:
2016-10-07
影响因子:
16.6
通讯作者:
Rolandi, Marco
中科院分区:
文献类型:
--
作者:
Hemmatian, Zahra;Keene, Scott;Josberger, Erik;Miyake, Takeo;Arboleda, Carina;Soto-Rodriguez, Jessica;Baneyx, Francois;Rolandi, Marco
In biological systems, intercellular communication is mediated by membrane proteins and ion channels that regulate traffic of ions and small molecules across cell membranes. A bioelectronic device with ion channels that control ionic flow across a supported lipid bilayer (SLB) should therefore be ideal for interfacing with biological systems. Here, we demonstrate a biotic–abiotic bioprotonic device with Pd contacts that regulates proton (H+) flow across an SLB incorporating the ion channels Gramicidin A (gA) and Alamethicin (ALM). We model the device characteristics using the Goldman–Hodgkin–Katz (GHK) solution to the Nernst–Planck equation for transport across the membrane. We derive the permeability for an SLB integrating gA and ALM and demonstrate pH control as a function of applied voltage and membrane permeability. This work opens the door to integrating more complex H+ channels at the Pd contact interface to produce responsive biotic–abiotic devices with increased functionality. Conventional electronics use electrons as charge carriers whereas biological systems use ions, confounding integration of electronics with biology. Here the authors show voltage-regulated flow of protons across a supported lipid bilayer using the ion channel Gramicidin A and the voltage-gated ion channel Alamethicin.
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