Catalytic component of P4-ATPase flippase complex, which catalyzes the hydrolysis of ATP coupled to the transport of phosphatidylcholine (PC) from the outer to the inner leaflet of the plasma membrane (PubMed:25947375, PubMed:29599178, PubMed:30530492). Initiates inward plasma membrane bending and recruitment of Bin/amphiphysin/Rvs (BAR) domain-containing proteins involved in membrane tubulation and cell trafficking (PubMed:29599178). Facilitates ITGB1/beta1 integrin endocytosis, delaying cell adhesion and cell spreading on extracellular matrix (PubMed:25947375, PubMed:29599178). Has low flippase activity toward glucosylceramide (GlcCer) (PubMed:30530492). {ECO:0000269|PubMed:25947375, ECO:0000269|PubMed:29599178, ECO:0000269|PubMed:30530492}. This is the function of ATP10A (ATPase phospholipid transporting 10A (putative), Ensembl gene identifier ENSG00000206190).