Acts as a transcriptional coactivator in Wg signaling. Proposed core component of the chromatin remodeling Ino80 complex which is involved in transcriptional regulation, DNA replication and probably DNA repair. ATP + H2O = ADP + H(+) + phosphate Forms homohexameric rings (Probable). May form a dodecamer with pont made of two stacked hexameric rings. Component of the chromatin remodeling Ino80 complex (By similarity). Belongs to the RuvB family.