期刊
FEBS LETTERS
卷 579, 期 18, 页码 3970-3974出版社
WILEY
DOI: 10.1016/j.febslet.2005.06.025
关键词
phytochrome; two-component system; analytical; ultracentrifugation; Pfr; histidine sensor kinase; signal transduction
Phytochromes, photoreceptors controlling important physiological processes in plants and many prokaryotes, are photochromic biliproteins. The red-absorbing Pr ground state is converted by light into the farred-absorbing Pfr which can be photoconverted back to Pr. In plants at least Pfr is the physiologically active signalling state. Here, we show that the N-terminal photochromic module of Cph1 homodimerises reversibly and independently in Pr and Pfr, Pfr-dimers being significantly more stable. Implications for the mechanism of signal transduction are discussed. (c) 2005 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies.
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