Nuclear Receptor Coactivator 2 (NCOA2)

Members of the nuclear hormone receptor superfamily, which includes the 5 steroid receptors and class II nuclear receptors (see below), are structurally characterized by 3 distinct domains: an N-terminal transcriptional activation domain, a central DNA-binding domain, and a C-terminal hormone-binding domain.

The nuclear receptor coactivator 2 (NCOA2) is a transcriptional coregulatory protein which contains several nuclear receptor interacting domains and an intrinsic histone acetyltransferase activity. NCOA2 is recruited to DNA promotion sites by ligand activated nuclear receptors. NCOA2 in turn acylates histones which makes downsteam DNA more accessible to transcription. Hence NCOA2 assists nuclear receptors in the upregulation of DNA expression.