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Light-induced electron transfer in a cryptochrome blue-light photoreceptor
Baldissera Giovani1, Martin Byrdin, Margaret Ahmad
1Université Paris VI, Tour 53 E 5, Casier 156, 4, Place Jussieu, 75252 Paris Cedex 05, France.
Nature Structural Biology
|May 6, 2003
Abstract:
Cryptochromes are flavoproteins implicated in multiple blue light-dependent signaling pathways regulating, for example, photomorphogenesis in plants or circadian clocks in animals. Using transient absorption spectroscopy, it is demonstrated that the primary light reactions in isolated Arabidopsis thaliana cryptochrome-1 involve intraprotein electron transfer from tryptophan and tyrosine residues to the excited flavin adenine dinucleotide cofactor.