Journal
CHEMISTRY AND PHYSICS OF LIPIDS
Volume 141, Issue 1-2, Pages 119-132Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.chemphyslip.2006.02.007
Keywords
lipid asymmetry; aminophospholipid translocase; flippase; P-glycoprotein; Drs2p; lipid scramblase
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Since the first discovery of ATP-dependent translocation of lipids in the human erythrocyte membrane in 1984, there has been Much evidence of the existence of various ATPases translocating lipids in eukaryotic cell membranes. They include P-type ATPases involved in inwards lipid transport from the exoplasmic leaflet to the cytosolic leaflet and ABC proteins involved in outwards transport. There are also ATP-independent proteins that catalyze the passage of lipids in both directions. Five P-type ATPase involved in lipid transport have been genetically characterized in yeast cells, suggesting a pool of several proteins with partially redundant activities responsible for the regulation of lipid asymmetry. However, expression and purification of individual yeast proteins is still insufficient to allow reconstitution experiments in liposomes. In this review, we want to give an overview over current investigation efforts about the identification and purification of proteins that may be involved in lipid translocation. (c) 2006 Elsevier Ireland Ltd. All rights reserved.
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