Abstract:The biosynthesis of glycosylphosphatidylinositol (GPI) membrane protein anchors is initiated in the endoplasmic reticulum by transfer of GlcNAc from the sugar nucleotide UDP-GlcNAc to phosphatidylinositol. The reaction is catalyzed by GPI GlcNAc transferase, a multi-subunit complex comprising the catalytic subunit Gpi3/PIG-A, as well as at least five other subunits including the hydrophobic protein Gpi2 which is essential for activity in yeast and mammals, but whose function is not known. Here we exploited Try… Show more
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