DNA helicase that modulates androgen receptor (AR)-dependent transactivation in a promoter-dependent manner. Not able to remodel mononucleosomes in vitro (By similarity). ATP + H2O = ADP + H(+) + phosphate Enzyme activity is enhanced by dsDNA (double-stranded DNA) and ssDNA (single-stranded DNA). Interacts with AR via its N-terminus. Interacts with DYRK1A. Binds DNA and mononucleosomes, but does not seem to form large multiprotein complexes (By similarity). Localizes in speckle-like nuclear compartments. Leu-Xaa-Xaa-Leu-Leu (LXXLL) motifs are known to be important for the association with nuclear receptors. Sumoylated. Belongs to the SNF2/RAD54 helicase family. Truncated N-terminus.