GTPase-activating protein (GAP) for ADP ribosylation factor 1 (ARF1). Hydrolysis of ARF1-bound GTP may lead to dissociation of coatomer from Golgi-derived membranes to allow fusion with target membranes.
Subcellular locations: Cytoplasm, Golgi apparatus membrane
Also found on peripheral punctate structures likely to be endoplasmic reticulum-Golgi intermediate compartment.
Widely expressed. Highest expression in endocrine glands (pancreas, pituitary gland, salivary gland, and prostate) and testis with a much higher expression in the testis than in the ovary.