FEATURES

FAMILY

cation transport ATPase (P-type) (TC 3.A.3) family

DESCRIPTION

Also known as AT8A1_HUMAN, ATP8A1, ATPIA. Catalytic component of a P4-ATPase flippase complex which catalyzes the hydrolysis of ATP coupled to the transport of aminophospholipids from the outer to the inner leaflet of various membranes and ensures the maintenance of asymmetric distribution of phospholipids (PubMed:31416931). Phospholipid translocation seems also to be implicated in vesicle formation and in uptake of lipid signaling molecules. In vitro, its ATPase activity is selectively and stereospecifically stimulated by phosphatidylserine (PS) (PubMed:31416931). The flippase complex ATP8A1:TMEM30A seems to play a role in regulation of cell migration probably involving flippase-mediated translocation of phosphatidylethanolamine (PE) at the plasma membrane (By similarity). Acts as aminophospholipid translocase at the plasma membrane in neuronal cells (By similarity). Component of a P4-ATPase flippase complex which consists of a catalytic alpha subunit and an accessory beta subunit (PubMed:31416931). Interacts with TMEM30A to form a flippase complex; this complex forms an intermediate phosphoenzyme (PubMed:20947505, PubMed:20961850, PubMed:21914794, PubMed:31416931). Interacts with TMEM30B; this interaction is reported conflictingly (PubMed:20961850).

EXTERNAL LINKS

ATP8A1

Phospholipid-transporting ATPase IA

ATP8A1

Molecular Synopsis