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. 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.