Related Experiment Videos
The CREB/ATF family of transcription factors: modulation by reversible phosphorylation
1European Molecular Biology Laboratory, Differentiation Programme, Heidelberg, Germany.
Abstract:
Changes in genetic programming of a cell are brought about by modulating the activity of transcription factors which control the initiation of gene transcription by RNA polymerase II. Phosphorylation of transcription factors as a regulatory mechanism is both rapid and readily reversible. Moreover, because a transcription factor can be targeted by several protein kinases and phosphatases, this covalent modification can effectively integrate information carried by multiple signal transduction pathways, thereby providing a palette for great versatility and flexibility in the regulation of gene expression. The CREB/ATF family of transcription factors serves as a paradigm illustrating the phosphorylation-mediated transfer of regulatory information from the cell surface to the nucleus.
Insights
Cellular genetic programming relies on transcription factors, which regulate gene transcription. Phosphorylation of these factors offers a rapid, reversible method for controlling gene expression and integrating cellular signals.
Area of Science:
- Molecular Biology
- Cellular Regulation
- Gene Expression
Background:
- Cellular genetic programming is modulated by transcription factors that control gene transcription initiation.
- Transcription factor activity is crucial for regulating gene expression patterns within cells.
Purpose of the Study:
- To elucidate the role of transcription factor phosphorylation in regulating gene expression.
- To demonstrate how phosphorylation integrates signals from various cellular pathways.
Main Methods:
- Investigated the regulatory mechanism of transcription factor phosphorylation.
- Analyzed the impact of protein kinases and phosphatases on transcription factor activity.
- Utilized the CREB/ATF family as a model system.
Main Results:
- Phosphorylation provides a rapid and reversible mechanism for modulating transcription factor activity.
- This covalent modification allows for the integration of information from multiple signal transduction pathways.
- The CREB/ATF family exemplifies phosphorylation-mediated information transfer.
Conclusions:
- Transcription factor phosphorylation is a key regulatory mechanism for gene expression.
- This process offers significant versatility and flexibility in cellular responses.
- Phosphorylation acts as a critical link between cell surface signals and nuclear gene regulation.