Tuning of B12 photochemistry in the CarH photoreceptor to avoid radical photoproducts
I. S. Camacho, E. Wall, I. V. Sazanovich, E. Gozzard, M. Towrie, N. T. Hunt, S. Hay, A. R. Jones
Abstract
Time-resolved infrared spectroscopy reveals the flow of electron density through coenzyme B12 in the light-activated, bacterial transcriptional regulator, CarH. The protein stabilises a series of charge transfer states that result in a photoresponse that avoids reactive, and potentially damaging, radical photoproducts.
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