Enables GABA receptor binding activity and protein C-terminus binding activity. Acts upstream of or within mesoderm development. Located in chromosome, centromeric region; cytosol; and plasma membrane. Part of protein phosphatase type 2A complex. Is active in synapse. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; respiratory system; and sensory organ. Orthologous to human PPP2CA (protein phosphatase 2 catalytic subunit alpha). [provided by Alliance of Genome Resources, Apr 2022]