Triiodothyronine (T3) differentially affects T3-receptor/retinoic acid receptor and T3-receptor/retinoid X receptor heterodimer binding to DNA

P. M. Yen, A. Sugawara, W. W. Chin

研究成果: Article査読

87 被引用数 (Scopus)


Thyroid hormone receptor (TR) heterodimerizes with retinoic acid receptor (RAR), retinoid X receptor (RXR), and triiodothyronine receptor auxiliary protein (TRAP) on natural and synthetic hormone response elements. Recently we showed that triiodothyronine (T3) decreased TR homodimer, but not TR/TRAP heterodimer, binding to several thyroid hormone response elements (TREs). The effect of ligand on TR/RAR and TR/RXR heterodimer binding to DNA is not known. In this study, we showed that TR formed heterodimers with RAR and RXR on a retinoic acid (RA) response element and two TREs. Surprisingly, T3, but not RA, decreased TR/RAR heterodimer binding to DNA. In contrast, T3, all- trans-RA, or 9-cis-RA did not affect TR/RXR binding to DNA. This finding suggests that TR/RXR heterodimer is a stable receptor complex that remains bound to response elements in the presence of ligand and therefore may be a receptor complex involved in T3-regulated transcription.

ジャーナルJournal of Biological Chemistry
出版ステータスPublished - 1992

ASJC Scopus subject areas

  • 生化学
  • 分子生物学
  • 細胞生物学


「Triiodothyronine (T<sub>3</sub>) differentially affects T<sub>3</sub>-receptor/retinoic acid receptor and T<sub>3</sub>-receptor/retinoid X receptor heterodimer binding to DNA」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。