Photoconversion and nuclear trafficking cycles determine phytochrome A's response profile to far-red light
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Author (Corporation)
Publication date
02.09.2011
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Type
01A - Journal article
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Parent work
Cell
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Volume
146
Issue / Number
5
Pages / Duration
813-825
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Cell Press
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Abstract
Phytochrome A (phyA) is the only photoreceptor in plants, initiating responses in far-red light and, as such, essential for survival in canopy shade. Although the absorption and the ratio of active versus total phyA are maximal in red light, far-red light is the most efficient trigger of phyA-dependent responses. Using a joint experimental-theoretical approach, we unravel the mechanism underlying this shift of the phyA action peak from red to far-red light and show that it relies on specific molecular interactions rather than on intrinsic changes to phyA's spectral properties. According to our model, the dissociation rate of the phyA-FHY1/FHL nuclear import complex is a principle determinant of the phyA action peak. The findings suggest how higher plants acquired the ability to sense far-red light from an ancestral photoreceptor tuned to respond to red light.
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ISBN
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0092-8674
1097-4172
1097-4172
Language
English
Created during FHNW affiliation
No
Strategic action fields FHNW
Publication status
Published
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Peer review of the complete publication
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Closed
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Citation
Rausenberger, J., Tscheuschler, A., Nordmeier, W., Wüst, F., Timmer, J., Schäfer, E., Fleck, C., & Hiltbrunner, A. (2011). Photoconversion and nuclear trafficking cycles determine phytochrome A’s response profile to far-red light. Cell, 146(5), 813–825. https://doi.org/10.1016/j.cell.2011.07.023