GPI mannosyltransferase 4

Definition:

Mannosyltransferase involved in glycosylphosphatidylinositol-anchor biosynthesis. Transfers a fourth mannose to some trimannosyl-GPIs during GPI precursor assembly. The presence of a fourth mannose in GPI is facultative and only scarcely detected, suggesting that it only exists in some tissues.

References:

[1]. Barbara W Taron, et al. Human Smp3p adds a fourth mannose to yeast and human glycosylphosphatidylinositol precursors in vivo. J Biol Chem. 2004 Aug 20;279(34):36083-92. [Content Brief]

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