title: P4 ATPases--the physiological relevance of lipid flipping transporters.
abstract: P4 ATPases are integral transmembrane proteins implicated in phospholipid translocation from the exoplasmic to the cytosolic leaflet of biological membranes. Our present knowledge on the cellular physiology of P4 ATPases is mostly derived from studies in the yeast Saccharomyces cerevisiae, where P4 ATPases play a pivotal role in the biogenesis of intracellular transport vesicles, polarized protein transport and protein maturation. In contrast, the physiological and cellular functions of mammalian P4 ATPases are largely unexplored. P4 ATPases act in concert with members of the CDC50 protein family, which are putative beta-subunits for P4 ATPases. This review highlights the current status of a slowly emerging research field and emphasizes the contribution of P4 ATPases to the vesicle-generating machinery.
authors.affiliation: Tytgat Institute for Liver and Intestinal Research, Academic Medical Center, Amsterdam, The Netherlands. c.c.paulusma@amc.uva.nl
authors.forename: Coen C
authors.initials: CC
authors.lastname: Paulusma
authors.forename: Ronald P J Oude
authors.initials: RP
authors.lastname: Elferink
mesh_terms: D000251:Adenosine Triphosphatases / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D001692:Biological Transport / Q000235:genetics / Q000502:physiology; D002784:Cholesterol / Q000378:metabolism; D006801:Humans; D026901:Membrane Transport Proteins / Q000145:classification / Q000235:genetics / Q000378:metabolism*; D010743:Phospholipids / Q000378:metabolism; D010802:Phylogeny; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism; D022161:Transport Vesicles / Q000235:genetics / Q000378:metabolism
chemical_list: D026901:Membrane Transport Proteins; D010743:Phospholipids; D002784:Cholesterol; D000251:Adenosine Triphosphatases