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PMID: 10348744 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S.

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

Science (New York, N.Y.) ·Vol. 284 ·No. 5419 ·1999-05-28 ·Pages 1539-41

Fankhauser C, Yeh KC, Lagarias JC, Zhang H, Elich TD, Chory J

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.

MeSH Terms

Amino Acid Sequence Arabidopsis/genetics,metabolism Arabidopsis Proteins Carrier Proteins/chemistry,genetics,metabolism Genes, Plant Histidine Kinase Intracellular Signaling Peptides and Proteins Light Membrane Proteins Molecular Sequence Data Mutation Phosphoproteins/chemistry,genetics,metabolism Phosphorylation Photoreceptor Cells Phytochrome/metabolism Phytochrome A Phytochrome B Plant Proteins Protein Kinases/metabolism Protein Serine-Threonine Kinases/metabolism Recombinant Fusion Proteins/metabolism Signal Transduction Transcription Factors

Chemicals

Arabidopsis Proteins Carrier Proteins Intracellular Signaling Peptides and Proteins Membrane Proteins PHYA protein, Arabidopsis PHYB protein, Arabidopsis PKS1 protein, Arabidopsis PKS1 protein, plant Phosphoproteins Phytochrome A Plant Proteins Recombinant Fusion Proteins Transcription Factors Phytochrome Phytochrome B Protein Kinases Protein Serine-Threonine Kinases Histidine Kinase

Authors & Affiliations

6 authors, click to expand affiliations / ORCID

Fankhauser C

Plant Biology Laboratory, Howard Hughes Medical Institute, Salk Institute, La Jolla, CA 92037, USA.

Yeh K C

Lagarias J C

Zhang H

Elich T D

Chory J

Article Info

Journal

Science (New York, N.Y.)

Abbr.

Science

ISSN

0036-8075

DOI

10.1126/science.284.5419.1539

Published

1999-05-28

Pages

1539-41

Language

English

Region

United States

NLM ID

0404511

Subset

Grants

NIGMS NIH HHS · R01GM52413 · United States

Databases

GENBANK

AF149053

External Links

PubMed source DOI: 10.1126/science.284.5419.1539 View journal details

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

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