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.
Publication types
-
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.
MeSH terms
-
Amino Acid Sequence
-
Arabidopsis / genetics
-
Arabidopsis / metabolism*
-
Arabidopsis Proteins*
-
Carrier Proteins / chemistry
-
Carrier Proteins / genetics
-
Carrier Proteins / metabolism*
-
Genes, Plant
-
Histidine Kinase
-
Intracellular Signaling Peptides and Proteins*
-
Light*
-
Membrane Proteins
-
Molecular Sequence Data
-
Mutation
-
Phosphoproteins / chemistry
-
Phosphoproteins / genetics
-
Phosphoproteins / 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*
Substances
-
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