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- Title
Interaction of the response regulator ARR4 with phytochrome B in modulating red light signaling.
- Authors
Sweere, U; Eichenberg, K; Lohrmann, J; Mira-Rodado, V; Bäurle, I; Kudla, J; Nagy, F; Schafer, E; Harter, K
- Abstract
The Arabidopsis thaliana response regulator 4, expressed in response to phytochrome B action, specifically interacts with the extreme amino-terminus of the photoreceptor. The response regulator 4 stabilizes the active Pfr form of phytochrome B in yeast and in planta, thus elevates the level of the active photoreceptor in vivo. Accordingly, transgenic Arabidopsis plants overexpressing the response regulator 4 display hypersensitivity to red light but not to light of other wavelengths. We propose that the response regulator 4 acts as an output element of a two-component system that modulates red light signaling on the level of the phytochrome B photoreceptor.
- Publication
Science (New York, N.Y.), 2001, Vol 294, Issue 5544, p1108
- ISSN
0036-8075
- Publication type
Journal Article
- DOI
10.1126/science.1065022