Proteomics analysis of the estrogen receptor α receptosome

Ivan Nalvarte, Thomas Schwend, Jan Åke Gustafsson

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The estrogen receptors (ERs) are ligand-dependent transcription factors that activate transcription by binding to estrogen response elements. Estrogen-mediated effects are tissue- and cell type-specific, determined by the cofactor recruitment to the ERs among other factors. To understand these differences in estrogen action, it is important to identify the various compositions of the ER complexes (ER receptosomes). In this report, we describe a fast and efficient method for the isolation of the ERα receptosome for proteomics analysis. Using immobilized estrogen response element on a Sepharose column in combination with two-dimensional electrophoresis and MALDI-TOF MS, significant amounts of proteins could be isolated and identified. Differences in ERα complex composition with the ER ligands 17β-estradiol, 4-hydroxytamoxifen, and ICI-182,780 could also be observed. Thus, this approach provides an easy and relevant way of identifying ERα cofactor and transcription factor recruitment under different conditions.

Original languageEnglish (US)
Pages (from-to)1411-1422
Number of pages12
JournalMolecular and Cellular Proteomics
Volume9
Issue number7
DOIs
StatePublished - Jul 2010

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Molecular Biology

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