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SPA1, a WD-Repeat Protein Specific to Phytochrome A Signal Transduction
Abstract
The five members of the phytochrome photoreceptor family of Arabidopsis thaliana control morphogenesis differentially in response to light. Genetic analysis has identified a signaling pathway that is specifically activated by phytochrome A. A component in this pathway, SPA1 (for “suppressor of phyA-105”), functions in repression of photomorphogenesis and is required for normal photosensory specificity of phytochrome A. Molecular cloning of the SPA1 gene indicates that SPA1 is a WD (tryptophan–aspartic acid)-repeat protein that also shares sequence similarity with protein kinases. SPA1 can localize to the nucleus, suggesting a possible function in phytochrome A–specific regulation of gene expression.
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Citations
Cited by
Phytochrome photosensory signalling networks
Quail, P. H. (2002) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm728 · Cited by 769
Self-citationDirect Targeting of Light Signals to a Promoter Element-Bound Transcription Factor
Martı́nez-Garcı́a, J. F., Huq, E., & Quail, P. H. (2000) · Science · doi:10.1126/science.288.5467.859 · Cited by 687
Self-citationPhytochrome Signaling Mechanisms
Li, J., Li, G., Wang, H., & Wang Deng, X. (2011) · The Arabidopsis Book · doi:10.1199/tab.0148 · Cited by 561
Jang, S., Marchal, V., Panigrahi, K. C. S., Wenkel, S., Soppe, W., Deng, X.-W., Valverde, F., & Coupland, G. (2008) · The EMBO Journal · doi:10.1038/emboj.2008.68 · Cited by 517
LAF1 ubiquitination by COP1 controls photomorphogenesis and is stimulated by SPA1
Seo, H. S., Yang, J.-Y., Ishikawa, M., Bolle, C., Ballesteros, M. L., & Chua, N.-H. (2003) · Nature · doi:10.1038/nature01696 · Cited by 489
Metadata
- Authors
- Hoecker, U., Tepperman, J. M., & Quail, P. H.
- Venue
- Science
- Published
- 1999-04-16
- Volume
- 284
- Issue
- 5413
- Pages
- 496-499
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2054857943
- Cited by
- 256
- References
- 0
- FWCI
- 33.15
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hoecker, U., Tepperman, J. M., & Quail, P. H. (1999). SPA1, a WD-Repeat Protein Specific to Phytochrome A Signal Transduction. Science. https://doi.org/10.1126/science.284.5413.496
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