Document Detail

Interaction of the response regulator ARR4 with phytochrome B in modulating red light signaling.
MedLine Citation:
PMID:  11691995     Owner:  NLM     Status:  MEDLINE    
The Arabidopsis thaliana response regulator 4, expressed in response to phytochrome B action, specifically interacts with the extreme amino-terminus of the photoreceptor. The response regulator 4 stabilizes the active Pfr form of phytochrome B in yeast and in planta, thus elevates the level of the active photoreceptor in vivo. Accordingly, transgenic Arabidopsis plants overexpressing the response regulator 4 display hypersensitivity to red light but not to light of other wavelengths. We propose that the response regulator 4 acts as an output element of a two-component system that modulates red light signaling on the level of the phytochrome B photoreceptor.
U Sweere; K Eichenberg; J Lohrmann; V Mira-Rodado; I Bäurle; J Kudla; F Nagy; E Schafer; K Harter
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  294     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  2001 Nov 
Date Detail:
Created Date:  2001-11-05     Completed Date:  2001-12-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1108-11     Citation Subset:  IM    
Institut für Biologie II / Botanik, Universität Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany.
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MeSH Terms
Arabidopsis / genetics,  metabolism*,  radiation effects
Arabidopsis Proteins / genetics,  metabolism*
Cell Nucleus / metabolism
Cytoplasm / metabolism
Genes, Plant
Photoreceptor Cells*
Phytochrome / chemistry,  metabolism*
Phytochrome B
Plants, Genetically Modified
Protein Conformation
Recombinant Fusion Proteins / metabolism
Signal Transduction*
Transcription Factors*
Two-Hybrid System Techniques
Yeasts / genetics,  metabolism
Reg. No./Substance:
0/ARR4 protein, Arabidopsis; 0/Arabidopsis Proteins; 0/PHYB protein, Arabidopsis; 0/Recombinant Fusion Proteins; 0/Transcription Factors; 11121-56-5/Phytochrome; 136250-22-1/Phytochrome B

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