Enhancement of human estrogen receptor activity by SPT6: A potential coactivator

Claudia Baniahmad, Zafar Nawaz, Aria Baniahmad, Martin A.G. Gleeson, Ming Jer Tsai, Bert W. O'Malley

Research output: Contribution to journalArticlepeer-review

90 Scopus citations


The conserved nature of the transcriptional machinery between yeast and higher eukaryotes makes the yeast system suitable to genetically dissect the signal transduction pathway of steroid hormone receptors. This report describes the yeast protein, SPT6, which modulates the transcriptional activity of the human estrogen receptor (hER) by affecting the C-terminal activation domain. It is demonstrated that SPT6 is able to potentiate hER activity in yeast and also in mammalian cells in vivo. SPT6 interacts specifically with the hormone-binding domain of hER in vivo. The in vivo studies are substantiated by specific protein-protein interactions between SPT6 and the hormone-binding domain of hER in vitro. Therefore, the data suggest that the SPT6 protein may be involved in signal transmission of ER by acting as a coactivator.

Original languageEnglish (US)
Pages (from-to)34-43
Number of pages10
JournalMolecular Endocrinology
Issue number1
StatePublished - Jan 1995
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Endocrinology


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