Format

Send to:

Choose Destination
See comment in PubMed Commons below
Science. 2001 Nov 2;294(5544):1108-11.

Interaction of the response regulator ARR4 with phytochrome B in modulating red light signaling.

Author information

  • 1Institut für Biologie II / Botanik, Universität Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany.

Abstract

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.

PMID:
11691995
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Write to the Help Desk