Glycosylphosphatidylinositol mannosyltransferase II is the rate-limiting enzyme in glycosylphosphatidylinositol biosynthesis under limited dolichol-phosphate mannose availability.

Abstract excerpt

Although the genes involved in the biosynthesis of glycosylphosphatidylinositol (GPI) are well characterized, the regulation of GPI biosynthesis remains unclear. We isolated and characterized a mutant cell line showing decreased surface expression of CD59 and the accumulation of GPI intermediates. The mutant cell line was partially defective in MPDU1, which encodes a protein required for the utilization of...

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