WW domain-binding protein 2 (Wbp2)

Acts as transcriptional coactivator of estrogen and progesterone receptors (ESR1 and PGR) upon hormone stimulation. In presence of estrogen, binds to ESR1-responsive promoters.

Required for YAP1 coactivation function on PGR activity. Synergizes with WBP2 in improving PGR activity (By similarity).