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- W2008709969 abstract "ABCA1 belongs to the A class of ABC transporter, which is absent in yeast. ABCA1 elicits lipid translocation at the plasma membrane through yet elusive processes. We successfully expressed the mouse Abca1 gene in Saccharomyces cerevisiae. The cloned ABCA1 distributed at the yeast plasma membrane in stable discrete domains that we name MCA (membrane cluster containing ABCA1) and that do not overlap with the previously identified punctate structures MCC (membrane cluster containing Can1p) and MCP (membrane cluster containing Pma1p). By comparison with a nonfunctional mutant, we demonstrated that ABCA1 elicits specific phenotypes in response to compounds known to interact with membrane lipids, such as papuamide B, amphotericin B and pimaricin. The sensitivity of these novel phenotypes to the genetic modification of the membrane lipid composition was studied by the introduction of the cho1 and lcb1-100 mutations involved respectively in phosphatidylserine or sphingolipid biosynthesis in yeast cells. The results, corroborated by the analysis of equivalent mammalian mutant cell lines, demonstrate that membrane composition, in particular its phosphatidylserine content, influences the function of the transporter. We thus have reconstituted in yeast the essential functions associated to the expression of ABCA1 in mammals and characterized new physiological phenotypes prone to genetic analysis. This article is a part of a Special Issue entitled Advances in High Density Lipoprotein Formation and Metabolism: A Tribute to John F. Oram (1945-2010)." @default.
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- W2008709969 date "2012-03-01" @default.
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- W2008709969 title "The mammalian ABC transporter ABCA1 induces lipid-dependent drug sensitivity in yeast" @default.
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- W2008709969 doi "https://doi.org/10.1016/j.bbalip.2011.07.005" @default.
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