PKS1, a substrate phosphorylated by phytochrome that modulates light signaling in Arabidopsis

Christian Fankhauser, Kuo Chen Yeh, J. Clark Lagarias, Hong Zhang, Tedd D. Elich, Joanne Chory

Research output: Contribution to journalArticle

319 Scopus citations

Abstract

Plants constantly monitor their light environment in order to grow and develop optimally, in part through use of the phytochromes, which sense red/far-red light. A phytochrome binding protein, PKS1 (phytochrome kinase substrate 1), was identified that is a substrate for light-regulated phytochrome kinase activity in vitro. In vivo experiments suggest that PKS1 is phosphorylated in a phytochrome-dependent manner and negatively regulates phytochrome signaling. The data suggest that phytochromes signal by serine- threonine phosphorylation.

Original languageEnglish
Pages (from-to)1539-1541
Number of pages3
JournalScience
Volume284
Issue number5419
DOIs
StatePublished - May 28 1999

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    Fankhauser, C., Yeh, K. C., Lagarias, J. C., Zhang, H., Elich, T. D., & Chory, J. (1999). PKS1, a substrate phosphorylated by phytochrome that modulates light signaling in Arabidopsis. Science, 284(5419), 1539-1541. https://doi.org/10.1126/science.284.5419.1539