The function of Ensembl gene identifier ENSG00000112139 (MDGA1, MAM domain containing glycosylphosphatidylinositol anchor 1) is as follows. Required for radial migration of cortical neurons in the superficial layer of the neocortex (By similarity). Plays a role in the formation or maintenance of inhibitory synapses. May function by inhibiting the activity of NLGN2. {ECO:0000250, ECO:0000269|PubMed:23248271}.