Estrogen-related receptor beta (ERR beta) a NR3 Steroid Receptor, has been shown to affect early placental development. ERR beta also can act as a repressor of transcriptional activity mediated by the glucocorticoid receptor (GR). ERR beta binds as a monomer to the extended half-site TNAAGTGCA and as a homodimer to the estrogen response element (ERE), palindromic thyroid hormone response element (TRE(pal)), and SF-1 response element, but not to the glucocorticoid response element (GRE). ERR beta mutations lead to abnormal development of the chorion and defective diploid trophoblast proliferation, and are lethal during midgestation. References: The UniProt Consortium. Nucleic Acids Res. 47: D506-515 (2019); Nucleic Acids Res. 2016 Jan 4;44(D1):D733-45, PMID:26553804