LCoR (ligand-dependent corepressor), also known as MLR2 (Mblk1-related protein 2), is a 47-50 kDa nuclear phosphoprotein that is a corepressor of ligand-dependent transcriptional activation by nuclear receptors such as estrogen and progesterone receptors. The 433 amino acid LCoR contains two N-terminal PxDLS nuclear receptor interaction motifs, a central HDAC interaction motif, a nuclear localization signal, and a C-terminal Helix-Turn-Helix motif. Nuclear receptors (NRs) regulate gene transcription by recruiting coregulators, involved in chromatin remodeling and assembly of the basal transcription machinery. The NR-associated protein ligand-dependent corepressor (LCoR) has previously been shown to suppress hepatic lipogenesis by decreasing the binding of steroid receptor coactivators to thyroid hormone receptor.
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