Photomodulation of Transmembrane Transport and Potential by Stiff-Stilbene Based Bis(thio)ureas
Access status:
Open Access
Type
ArticleAuthor/s
Wezenberg, Sander J.Chen, Li-Jun
Howe, Ethan N.W.
Wu, Xin
Siegler, Maxime A.
Gale, Philip A.
Bos, Jasper E.
Feringa, Ben L.
Abstract
Membrane transport proteins fulfil important regulatory functions in biology with a common trait being their ability to respond to stimuli in the environment. Various small-molecule receptors, capable of mediating transmembrane transport have been successfully developed. However, ...
See moreMembrane transport proteins fulfil important regulatory functions in biology with a common trait being their ability to respond to stimuli in the environment. Various small-molecule receptors, capable of mediating transmembrane transport have been successfully developed. However, to confer stimuli-responsiveness on them poses a fundamental challenge. Here we demonstrate photocontrol of transmembrane transport and electric potential using bis-(thio)ureas derived from stiff-stilbene. UV-vis and 1H NMR spectroscopy are used to monitor E-Z photoisomerization of these bis-(thio)ureas and 1H NMR titrations reveal stronger binding of chloride to the (Z)-form than to the (E)-form. Additional insight into the binding properties is provided by single crystal X-ray crystallographic analysis and DFT geometry optimization. Importantly, the (Z)-isomers are much more active in transmembrane transport than the respective (E)-isomers as shown through various assays. As a result, both membrane transport and depolarization can be modulated upon irradiation, opening up new prospects toward light-based therapeutics as well as physiological and optopharmacological tools for studying anion transport-associated diseases and to stimulate neuronal activity, respectively.
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See moreMembrane transport proteins fulfil important regulatory functions in biology with a common trait being their ability to respond to stimuli in the environment. Various small-molecule receptors, capable of mediating transmembrane transport have been successfully developed. However, to confer stimuli-responsiveness on them poses a fundamental challenge. Here we demonstrate photocontrol of transmembrane transport and electric potential using bis-(thio)ureas derived from stiff-stilbene. UV-vis and 1H NMR spectroscopy are used to monitor E-Z photoisomerization of these bis-(thio)ureas and 1H NMR titrations reveal stronger binding of chloride to the (Z)-form than to the (E)-form. Additional insight into the binding properties is provided by single crystal X-ray crystallographic analysis and DFT geometry optimization. Importantly, the (Z)-isomers are much more active in transmembrane transport than the respective (E)-isomers as shown through various assays. As a result, both membrane transport and depolarization can be modulated upon irradiation, opening up new prospects toward light-based therapeutics as well as physiological and optopharmacological tools for studying anion transport-associated diseases and to stimulate neuronal activity, respectively.
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Date
2021Source title
Journal of the American Chemical SocietyVolume
144Issue
1Publisher
American Chemical SocietyFunding information
ARC DP200100453Licence
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0Faculty/School
Faculty of Science, School of ChemistryThe University of Sydney Multidisciplinary Centres and Institutes , The University of Sydney Nano Institute
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