Inhibits signal transduction by increasing the GTPase activity of G protein alpha subunits thereby driving them into their inactive GDP-bound form.
Subcellular locations: Cytoplasm, Nucleus
Expressed in the cytoplasm of spermatogonia and spermatocytes. In spermatids, also expressed in the nucleus.
Testis-specific. Expressed in Leydig cells and spermatogenic cells from the spermatogonia to spermatid stages (at protein level).