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[Transcriptional control by steroid receptor]
1Institute of Molecular and Cellular Biosciences, University of Tokyo.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|August 14, 1998
Summary
Nuclear receptors are ligand-inducible transcription factors regulating gene expression. Their DNA binding and interactions with co-factors control crucial biological events.
Area of Science:
- Molecular Biology
- Genetics
- Endocrinology
Context:
- Nuclear receptors form a superfamily of ligand-inducible transcription factors.
- They regulate diverse biological events by controlling target gene expression.
Purpose:
- To elucidate the mechanisms of nuclear receptor-mediated gene transcription.
- To understand the role of specific domains (AF-1 and AF-2) and DNA binding (HREs) in transcriptional regulation.
Summary:
- Nuclear receptors bind to hormone response elements (HREs) as dimers, with HRE structure dictating receptor specificity.
- Ligand binding modulates transcription via interactions with RNA polymerase II and auxiliary factors.
- Nuclear co-activators and co-repressors play a role in ligand-induced transactivation.
Impact:
- Provides foundational knowledge on nuclear receptor function in gene regulation.
- Highlights the importance of structural motifs in HREs for selective receptor binding.
- Establishes the framework for investigating the roles of co-factors in nuclear receptor signaling pathways.