Regulates phosphatase activity of protein phosphatase 1 (PP1) complexes in the testis.
Subcellular locations: Cytoplasm, Cytoskeleton, Cytoplasm, Cytoskeleton, Microtubule organizing center, Centrosome
Colocalizes with alpha tubulin to the manchette of developing spermatids. Detected to nuclear rim in pachytene spermatocytes. Detected at nuclear surface, opposite the acrosome in elongating spermatids. Detected at the microtubule-organizing center (MTOC). Localized to the centrosomal region of late-stage spermatids (By similarity).