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Published on: July 23, 2009
Activation and repression in the nervous system
1Vollum Institute, Oregon Health Sciences University, Portland 97201, USA. goodmanr@ohsu.edu
Current Opinion in Neurobiology
|August 4, 1998
Abstract:
The mechanisms underlying transcriptional activation and repression have become much clearer. Recent evidence suggests that transcription factors that do not bind DNA directly, the co-activators and co-repressors, mediate a large number of cell signaling events. Their association with histone acetylases, to mediate activation, or deacetylases, to mediate repression, provide a model for explaining how gene expression is regulated.
Insights
New findings clarify gene regulation. Transcription factors that don't bind DNA directly, co-activators and co-repressors, are key players in cell signaling and gene expression control.
Area of Science:
- Molecular Biology
- Genetics
- Cell Signaling
Background:
- Transcriptional activation and repression mechanisms are increasingly understood.
- Transcription factors play a crucial role in regulating gene expression.
- Cell signaling pathways are intricately linked to gene regulation.
Purpose of the Study:
- To elucidate the role of co-activators and co-repressors in transcriptional regulation.
- To explain how non-DNA-binding transcription factors mediate cell signaling.
- To present a model for gene expression regulation involving histone modifications.
Main Methods:
- Review of recent evidence on transcription factor function.
- Analysis of co-activator and co-repressor interactions.
- Integration of cell signaling pathways with epigenetic modifications.
Main Results:
- Transcription factors not directly binding DNA (co-activators/co-repressors) mediate numerous cell signaling events.
- Co-activators associate with histone acetylases for gene activation.
- Co-repressors associate with histone deacetylases for gene repression.
Conclusions:
- Co-activators and co-repressors provide a mechanistic link between cell signaling and gene expression.
- Histone acetylase and deacetylase associations offer a model for regulated gene expression.
- Understanding these mechanisms is vital for comprehending cellular function and disease.
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