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Transcriptional activation and repression in the plant circadian clock: Revisiting core oscillator feedback loops and output pathways
How Gene Activation and Repression Shape the Plant Biological Clock and Its Feedback and Output Systems
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Abstract
Transcription factors in plant circadian clocks may function as both activators and repressors of gene expression.
- The plant circadian clock consists of interconnected feedback loops involving transcriptional activators and repressors.
- Most identified transcription factors in these loops are repressors, suggesting a model dominated by repressive interactions.
- Recent studies indicate the presence of transcriptional activators in newly identified feedback loops.
- Some transcription factors may act as both activators and repressors, expanding understanding of clock regulatory mechanisms.
- The review provides a framework for understanding the roles of transcriptional activation and repression in core oscillator genes.
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