Catalytic component of a P4-ATPase flippase complex, which catalyzes the hydrolysis of ATP coupled to the transport of glucosylceramide (GlcCer) from the outer to the inner leaflet of the plasma membrane. . This is the function of Ensembl gene identifier ENSG00000145246 (ATP10D, ATPase phospholipid transporting 10D (putative)).