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PMID: 16857903 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Brassinosteroids regulate dissociation of BKI1, a negative regulator of BRI1 signaling, from the plasma membrane.

Science (New York, N.Y.) ·Vol. 313 ·No. 5790 ·2006-08-25 ·Pages 1118-22

Wang X, Chory J

Abstract

Brassinosteroids, the steroid hormones of plants, are perceived at the plasma membrane by a leucine-rich repeat receptor serine/threonine kinase called BRI1. We report a BRI1-interacting protein, BKI1, which is a negative regulator of brassinosteroid signaling. Brassinosteroids cause the rapid dissociation of BKI1-yellow fluorescent protein from the plasma membrane in a process that is dependent on BRI1-kinase. BKI1 is a substrate of BRI1 kinase and limits the interaction of BRI1 with its proposed coreceptor, BAK1, suggesting that BKI1 prevents the activation of BRI1.

MeSH Terms
Amino Acid Sequence Arabidopsis/metabolism Arabidopsis Proteins/chemistry,genetics,metabolism Brassinosteroids Cell Membrane/metabolism Cholestanols/metabolism,pharmacology DNA-Binding Proteins Gene Expression Regulation, Plant Meristem/metabolism Molecular Sequence Data Nuclear Proteins/metabolism Phosphorylation Plants, Genetically Modified Protein Binding Protein Kinases/chemistry,genetics,metabolism Protein Structure, Tertiary RNA Interference Recombinant Fusion Proteins/metabolism Signal Transduction Steroids, Heterocyclic/metabolism,pharmacology Two-Hybrid System Techniques
Chemicals
Arabidopsis Proteins BES1 protein, Arabidopsis BKI1 protein, Arabidopsis Brassinosteroids Cholestanols DNA-Binding Proteins Nuclear Proteins Recombinant Fusion Proteins Steroids, Heterocyclic Protein Kinases BRI1 protein, Arabidopsis brassinolide
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Wang Xuelu
Howard Hughes Medical Institute and Plant Biology Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
Chory Joanne
Article Info
Journal
Science (New York, N.Y.)
Abbr.
Science
ISSN
1095-9203
Published
2006-08-25
Epub
2006-00-20
Pages
1118-22
Language
English
Region
United States
NLM ID
0404511
Subset
IM
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