Negatively regulates the Hedgehog (SHH) signaling. Binds to the promoter of the SHH signaling mediator, GLI1, and inhibits its expression. Both detected in the nucleus and cytoplasm, localizes to the nucleus where it binds chromatin upon stimulation of the Hedgehog pathway. In skin, expressed in the basal, spinous and granular layers of the epidermis. Also expressed in hair follicles, sebaceaous glands, eccrine sweat glands and semen. Mutations and insertions in the coding sequence or in regulatory non-coding elements of this gene may be associated with Bazex syndrome; a cancer-prone genodermatosis with an X-linked dominant inheritance pattern. Belongs to the actin family.