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Science 23 November 2007:
Vol. 318. no. 5854, pp. 1302 - 1305
DOI: 10.1126/science.1146281
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Reports

Transposase-Derived Transcription Factors Regulate Light Signaling in Arabidopsis

Rongcheng Lin,1 Lei Ding,1 Claudio Casola,2 Daniel R. Ripoll,3 Cédric Feschotte,2 Haiyang Wang1*

Plants use light to optimize growth and development. The photoreceptor phytochrome A (phyA) mediates various far-red light–induced responses. We show that Arabidopsis FHY3 and FAR1, which encode two proteins related to Mutator-like transposases, act together to modulate phyA signaling by directly activating the transcription of FHY1 and FHL, whose products are essential for light-induced phyA nuclear accumulation and subsequent light responses. FHY3 and FAR1 have separable DNA binding and transcriptional activation domains that are highly conserved in Mutator-like transposases. Further, expression of FHY3 and FAR1 is negatively regulated by phyA signaling. We propose that FHY3 and FAR1 represent transcription factors that have been co-opted from an ancient Mutator-like transposase(s) to modulate phyA-signaling homeostasis in higher plants.

1 Boyce Thompson Institute for Plant Research (BTI), Cornell University, Ithaca, NY 14853, USA.
2 Department of Biology, University of Texas, Arlington, TX 76019, USA.
3 Computational Biology Service Unit (CBSU), Cornell University, Ithaca, NY 14853, USA.

* To whom correspondence should be addressed. E-mail: hw75{at}cornell.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Discrete and Essential Roles of the Multiple Domains of Arabidopsis FHY3 in Mediating Phytochrome A Signal Transduction.
R. Lin, Y. Teng, H.-J. Park, L. Ding, C. Black, P. Fang, and H. Wang (2008)
Plant Physiology 148, 981-992
   Abstract »    Full Text »    PDF »
Hormone- and light-regulated nucleocytoplasmic transport in plants: current status.
Y. Lee, H.-S. Lee, J.-S. Lee, S.-K. Kim, and S.-H. Kim (2008)
J. Exp. Bot. 59, 3229-3245
   Abstract »    Full Text »    PDF »
Genome-Wide Analysis of Transposon Insertion Polymorphisms Reveals Intraspecific Variation in Cultivated Rice.
X. Huang, G. Lu, Q. Zhao, X. Liu, and B. Han (2008)
Plant Physiology 148, 25-40
   Abstract »    Full Text »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)