Binds DNA as a homodimer. Can form a heterodimer with ESR1. Interacts with NCOA3, NCOA5 and NCOA6 coactivators, leading to a strong increase of transcription of target genes. Interacts with PELP1, UBE1C and AKAP13. Interacts with DNTTIP2 (By similarity). Interacts with CCDC62 in the presence of estradiol/E2; this interaction seems to enhance the transcription of target genes. Interacts with DYX1C1. Interacts with PRMT2 (By similarity).