Negatively regulates the androgen receptor by recruiting histone deacetylase complex, and protein DJ-1 antagonizes this inhibition by abrogation of this complex. Microtubule inner protein (MIP) part of the dynein-decorated doublet microtubules (DMTs) in cilia axoneme, which is required for motile cilia beating. Binds PARK7. Part of a ternary complex containing PARK7, EFCAB6/DJBP and AR (By similarity). Truncated N-terminus.