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Plant bZIP G-box binding factors. Modular structure and activation mechanisms
Y Sibéril1, P Doireau, P Gantet
1UPRES-EA2106 Biomolécules et Biotechnologies Végétales, Université de Tours, UFR des Sciences et Techniques, Laboratoire de Physiologie Végétale, Parc de Grandmont, France.
European Journal of Biochemistry
|November 28, 2001
Summary
This review summarizes knowledge on G-box binding factors (GBFs), a key transcription factor family. We propose a model for GBF signal transduction from cytoplasm to nucleus, impacting plant development.
Area of Science:
- Molecular Biology
- Plant Science
- Genetics
Background:
- G-box binding factors (GBFs) are a well-studied transcription factor family in plants.
- They possess conserved structural domains including proline-rich, basic, and leucine-zipper regions.
Purpose of the Study:
- To review current knowledge on GBF structure, function, and regulation.
- To propose a model for GBF-mediated signal transduction pathways in plants.
Main Methods:
- Bioinformatic analysis of protein sequence homology.
- Functional characterization through in vitro and in vivo experiments.
- Identification of conserved protein motifs and specific functional regions.
Main Results:
- Discovery of GBF-specific sequences involved in post-transcriptional regulation and protein interactions.
- Identification of a 'multifunctional mosaic region' potentially regulating translocation and transcription.
- Evidence for a modular structure and involvement in light and hormone signaling.
Conclusions:
- GBFs play crucial roles in plant development and physiology.
- A comprehensive model for GBF signal transduction is proposed, linking cytoplasmic events to nuclear gene regulation.
- Further research is needed to assign specific physiological roles to GBF modular structures.