Nuclear receptor coactivator that can enhance preferentially estrogen receptors ESR1 and ESR2 transactivation. Modulates also progesterone/PGR, glucocorticoid/NR3C1 and androgen/AR receptors transactivation, although at lower level; little effect on vitamin D receptor/VDR. Required for normal spermiogenesis. It probably plays a role in acrosome formation (By similarity).
Subcellular locations: Cytoplasm, Nucleus, Cytoplasmic vesicle, Secretory vesicle, Acrosome
Mainly nuclear.
Highly expressed in adult testis. Expressed in both prostate epithelial and stromal cells, with predominant expression in epithelial cells (at protein level) . Not detected in prostate by RT-PCR . Overexpressed in various cancers.