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The CRY1 Blue Light Photoreceptor of Arabidopsis Interacts with Phytochrome A In Vitro
Open accessAbstract
Plants have at least two major photosensory receptors: phytochrome (absorbing primarily red/far-red light) and cryptochrome (absorbing blue/UV-A light); considerable physiological and genetic evidence suggests some form of communication or functional dependence between the receptors. Here, we demonstrate in vitro, using purified recombinant photoreceptors, that Arabidopsis CRY1 and CRY2 (cryptochrome) are substrates for phosphorylation by a phytochrome A-associated kinase activity. Several mutations within the CRY1 C terminus lead to reduced phosphorylation by phytochrome preparations in vitro. Yeast two-hybrid interaction studies using expressed C-terminal fragments of CRY1 and phytochrome A from Arabidopsis confirm a direct physical interaction between both photoreceptors. In vivo labeling studies and specific mutant alleles of CRY1, which interfere with the function of phytochrome, suggest the possible relevance of these findings in vivo.
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Citations
Cites
Putative Human Blue-Light Photoreceptors hCRY1 and hCRY2 Are Flavoproteins
Hsu, D. S., Zhao, X., Zhao, S., Kazantsev, A., Wang, R.-P., Todo, T., Wei, Y.-F., & Sancar, A. (1996) · Biochemistry · doi:10.1021/bi962209o · Cited by 291
Cited by
Molecular Bases for Circadian Clocks
Dunlap, J. C. (1999) · Cell · doi:10.1016/s0092-8674(00)80566-8 · Cited by 2,900
PAS Domains: Internal Sensors of Oxygen, Redox Potential, and Light
Taylor, B. L., & Zhulin, I. B. (1999) · Microbiology and Molecular Biology Reviews · doi:10.1128/mmbr.63.2.479-506.1999 · Cited by 1,632
Phytochromes and light signal perception by plants—an emerging synthesis
Smith, H. (2000) · Nature · doi:10.1038/35036500 · Cited by 1,380
The cryb mutation identifies cryptochrome as a circadian photoreceptor in Drosophila
Stanewsky, R., Kaneko, M., Emery, P., Beretta, B., Wager-Smith, K., Kay, S. A., Rosbash, M., & Hall, J. C. (1998) · Cell · doi:10.1016/s0092-8674(00)81638-4 · Cited by 968
Phytochrome Signaling Mechanisms
Li, J., Li, G., Wang, H., & Wang Deng, X. (2011) · The Arabidopsis Book · doi:10.1199/tab.0148 · Cited by 561
Metadata
- Authors
- Ahmad, M., Jarillo, J. A., Smirnova, O., & Cashmore, A. R.
- Venue
- Molecular Cell
- Publisher
- Elsevier BV
- Published
- 1998-06
- Volume
- 1
- Issue
- 7
- Pages
- 939-948
- ISSN
- 1097-2765 (ISSN-L)
- OpenAlex
- W2011832991
- Cited by
- 312
- References
- 1
- FWCI
- 32.70
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Ahmad, M., Jarillo, J. A., Smirnova, O., & Cashmore, A. R. (1998). The CRY1 Blue Light Photoreceptor of Arabidopsis Interacts with Phytochrome A In Vitro. Molecular Cell. https://doi.org/10.1016/s1097-2765(00)80094-5
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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