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Bluelight-induced, flavin-mediated transport of redox equivalents across artificial bilayer membranes

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Summary

This paper continues our studies of physico-chemical properties of vesicle-bound flavins. Based on previous results, an advanced model system was designed in order to study the mechanisms underlying bluelight-induced redox transport across artificial membranes. The lumen of single-shelled vesicles was charged with cytochromec, and amphiphilic flavin (AF1 3, AF1 10) was bound to the membrane. Upon bluelight irradiation redox equivalents are translocated from exogeneous 1e −(EDTA)-and 2e −(BH3CN−) donors across the membrane finally reducing the trapped cytochromec both under aerobic and anaerobic conditions. The mechanisms involved are explored and evidence for the involvement of various redox states of oxygen, dihydroflavin and flavosemiquinone is presented.

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  1. Privatdozent für Biophysik, Universität Konstanz, Fakultät für Biologie, D-7750, Konstanz I, West Germany

    Werner Schmidt

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Schmidt, W. Bluelight-induced, flavin-mediated transport of redox equivalents across artificial bilayer membranes. J. Membrain Biol. 82, 113–122 (1984). https://doi.org/10.1007/BF01868936

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