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 (By similarity). Interacts with ESR1 and ESR2 in the presence of estradiol/E2. The interaction with ESR2 recruits CCDC62 to ER target genes, including cyclin-D1/CCND1 AP-1 promoter (By similarity). Mainly nuclear. Contains 2 Leu-Xaa-Xaa-Leu-Leu (LXXLL) motifs. The first one is essential for the association with ESR1 and ESR2 (By similarity).