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. ATP + H2O + phospholipidSide 1 = ADP + phosphate + phospholipidSide 2. a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine(out) + ATP + H2O = a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine(in) + ADP + H(+) + phosphate Component of a P4-ATPase flippase complex which consists of a catalytic alpha subunit ATP10A and an accessory beta subunit TMEM30A. Exit from the endoplasmic reticulum requires the presence of TMEM30A, but not that of TMEM30B. Expressed in placenta and, to a lesser extent, in kidney. Autophosphorylated at the conserved aspartate of the P-type ATPase signature sequence. Belongs to the cation transport ATPase (P-type) (TC 3.A.3) family. Type IV subfamily.