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The nuclear receptor transcriptional coregulator RIP140
Patrick Augereau1, Eric Badia, Sophie Carascossa
1INSERM, U540, Montpellier, France.
RIP140 is a nuclear receptor cofactor that represses transcription, essential for female fertility and energy balance. Its activity is modulated by post-translational modifications and regulation by nuclear receptors.
Area of Science:
- Molecular Biology
- Endocrinology
- Genetics
Background:
- Nuclear receptors are ligand-regulated transcription factors controlling development and physiology.
- They recruit coregulatory proteins to modulate gene expression.
- RIP140 was one of the first identified hormone-recruited cofactors.
Purpose of the Study:
- To investigate the role and regulation of RIP140, a transcriptional cofactor.
- To understand RIP140's function in nuclear receptor activity and physiological processes.
Main Methods:
- Analysis of RIP140's modular structure and inhibitory domains.
- Investigating transcriptional regulation of the RIP140 gene.
- Studying post-translational modifications of RIP140.
- Phenotypic analysis of RIP140-deficient mice.
Main Results:
- RIP140 exhibits strong transcriptional repressive activity despite receptor recruitment.
- The RIP140 gene is transcriptionally regulated by nuclear receptors.
- Post-translational modifications influence RIP140's repressive activity.
- RIP140 deficiency in mice impairs female fertility and energy homeostasis.
Conclusions:
- RIP140 is a crucial modulator of nuclear receptor activity.
- RIP140 plays significant roles in physiological processes and hormone-dependent diseases.
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