PubAg

Main content area

Proton-consumed nanoarchitectures toward sustainable and efficient photophosphorylation

Author:
Li, Guangle, Fei, Jinbo, Xu, Youqian, Hong, Jong-Dal, Li, Junbai
Source:
Journal of colloid and interface science 2019 v.535 pp. 325-330
ISSN:
0021-9797
Subject:
adenosine triphosphate, cell membranes, enzymes, ions, neutralization, photophosphorylation, protons
Abstract:
At present, photophosphorylation in natural or artificial systems is accomplished by the production of protons or their pumping across the biomembranes. Herein, different from this strategy above, we demonstrate a designed system which can effectively enhance photophosphorylation by photo-induced proton-scavenging through molecular assembly. Upon the introduction of photobase generators, a (photo-) chemical reaction occurs to produce hydroxyl ions. Accompanying the further extramembranous acid-base neutralization reaction, an outbound flow of protons is generated to drive the reconstituted adenosine triphosphate (ATP) synthase to produce ATP. That is, contrary to biochemistry, the proton gradient to drive photophosphorylation derives from the scavenging of protons present in the external medium by hydroxyl ions, produced by the partially photo-induced splitting of photobase generator. Such assembled system holds great potential in ATP-consuming bioapplications.
Agid:
6153714