دورية
Another Link between Phospholipid Transmembrane Migration and ABC Transporter Gene Family, Inferred from a Rare Inherited Disorder of Phosphatidylserine Externalization
| العنوان: | Another Link between Phospholipid Transmembrane Migration and ABC Transporter Gene Family, Inferred from a Rare Inherited Disorder of Phosphatidylserine Externalization |
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| المؤلفون: | Toti, Florence, Schindler, Véronique, Riou, Jean-François, Lombard-Platet, Gaël, Fressinaud, Edith, Meyer, Dominique, Uzan, André, Pecq, Jean-Bernard Le, Mandel, Jean-Louis, Freyssinet, Jean-Marie |
| المصدر: | Biochemical and Biophysical Research Communications; December 1997, Vol. 241 Issue: 2 p548-552, 5p |
| مستخلص: | The mechanisms involved in the maintenance or loss of the asymmetric distribution of phospholipids in the cell plasma membrane remain mysterious. In the yeastSaccharomyces cerevisiae,the transmembrane migration of certain phospholipids is controlled by transcription regulators of various ATP-binding cassette (ABC) transporters. The P-glycoprotein membrane transporters encoded by the multidrug resistance (MDR) genes, members of the ABC protein family, act as lipid translocases in mammalian cells. We report here the lack of expression ofMDRgenes in lymphoblasts derived from the B cells of a patient with an inherited Scott syndrome, characterized by impaired transmembrane migration of procoagulant phosphatidylserine and hemorrhagic complications. From microsatellite analysis of 7q21.1 and functional assessment, the most likely explanation accounting for Scott phenotype is a mutation in an unlinked gene coding for a regulatory protein necessary for the expression ofMDRgenes. Because phosphatidylserine externalization is also one of the hallmarks of cells undergoing apoptosis, these observations are suggestive of a relationship between basic processes such as multidrug transport, apoptosis and procoagulant phospholipid exposure. |
| قاعدة البيانات: | Supplemental Index |
| تدمد: | 0006291X 10902104 |
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| DOI: | 10.1006/bbrc.1997.7836 |