ID   2.4.1.198
DE   phosphatidylinositol N-acetylglucosaminyltransferase.
AN   UDP-N-acetyl-D-glucosamine:phosphatidylinositol N-acetyl-D-
AN   glucosaminyltransferase.
AN   uridine diphosphoacetylglucosamine alpha1,6-acetyl-D-
AN   glucosaminyltransferase.
CA   a 1,2-diacyl-sn-glycero-3-phospho-(1D-myo-inositol) + UDP-N-acetyl-alpha-
CA   D-glucosamine = a 6-(N-acetyl-alpha-D-glucosaminyl)-1-phosphatidyl-
CA   1D-myo-inositol + H(+) + UDP.
CC   -!- Involved in the first step of glycosylphosphatidylinositol (GPI)
CC       anchor formation in all eukaryotes.
CC   -!- In mammalian cells, the enzyme is composed of at least five subunits
CC       (PIG-A, PIG-H, PIG-C, GPI1 and PIG-P).
CC   -!- PIG-A subunit is the catalytic subunit.
CC   -!- In some species, the long-chain acyl groups of the phosphatidyl group
CC       are partly replaced by long-chain alkyl or alk-1-enyl groups.
DR   Q9Y7L7, GPI15_SCHPO;  P53961, GPI15_YEAST;  Q756D4, GPI19_EREGS;
DR   Q04082, GPI19_YEAST;  P53306, GPI1_YEAST ;  O59802, GPI2_SCHPO ;
DR   P46961, GPI2_YEAST ;  P87172, GPI3_SCHPO ;  B3LKQ3, GPI3_YEAS1 ;
DR   B5VSZ6, GPI3_YEAS6 ;  A6ZW78, GPI3_YEAS7 ;  P32363, GPI3_YEAST ;
DR   Q94BX4, PIGA_ARATH ;  P37287, PIGA_HUMAN ;  Q64323, PIGA_MOUSE ;
DR   O64761, PIGC_ARATH ;  Q54M40, PIGC_DICDI ;  O64792, PIGP_ARATH ;
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