Related Experiment Video

Updated: Aug 9, 2026

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay
09:07

Detecting the Ligand-binding Domain Dimerization Activity of Estrogen Receptor Alpha Using the Mammalian Two-Hybrid Assay

Published on: December 19, 2018

Ligand-induced estrogen receptor alpha degradation by the proteasome: new actors?

Mathilde Calligé1, Hélène Richard-Foy

  • 1Laboratoire de Biologie Moléculaire Eucaryote, Institut d'Exploration Fonctionnelle des Génomes, Toulouse, France.

Nuclear Receptor Signaling
|April 11, 2006
PubMed

Insights

Ligand-induced estrogen receptor alpha (ERalpha) degradation involves CSN5/Jab1 and the CSN complex. This perspective explores ERalpha degradation, nuclear export, and its link to transcription activation.

Area of Science:

  • Molecular Endocrinology
  • Cell Biology
  • Biochemistry

Background:

  • Estrogen receptor alpha (ERalpha) is a key regulator of gene expression.
  • Ligand-induced ERalpha degradation is a critical mechanism controlling its activity.
  • The roles of CSN5/Jab1 and the COP9 signalosome (CSN) complex in ERalpha regulation are not fully understood.

Purpose of the Study:

  • To explore new aspects of ligand-induced ERalpha degradation.
  • To investigate the potential roles of CSN5/Jab1 and the CSN complex in ERalpha degradation.
  • To integrate new findings into a model of ERalpha action.

Main Methods:

  • Comparative analysis of ERalpha degradation induced by estrogen or fulvestrant.
  • Review of the effects of kinase inhibitors on ERalpha degradation.
  • Examination of CRM1-dependent nuclear export's impact on ERalpha degradation and transcription.

Main Results:

  • Ligand-induced ERalpha degradation is influenced by CSN5/Jab1 and the CSN complex.
  • Kinase inhibitors and CRM1-dependent nuclear export affect ERalpha degradation and transcriptional activity.
  • A novel model for ERalpha action is proposed, integrating these factors.

Conclusions:

  • CSN5/Jab1 and the CSN complex play significant roles in ERalpha degradation.
  • ERalpha degradation is intricately linked to its transcriptional activation.
  • Understanding these mechanisms provides new insights into ERalpha-mediated signaling.

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