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GPI transamidase complex
Catalyzes transfer of GPI to proteins.
General
molecular complex
transferase
Properties
MOTIF: active site
SUBUNITS: glycosylphosphatidylinositol anchor attachment 1 protein
COMPARTMENT: cellular membrane
MOTIF: cytoplasmic domain {1-23}
transmembrane domain {24-44}
exoplasmic loop {45-367}
MOTIF: N-glycosylation site {N202}
transmembrane domain {368-388}
cytoplasmic loop {389-426}
transmembrane domain {427-447}
exoplasmic loop {448-457}
transmembrane domain {458-478}
cytoplasmic loop {479-494}
transmembrane domain {495-515}
exoplasmic loop {516-542}
MOTIF: N-glycosylation site {N516}
transmembrane domain {543-563}
cytoplasmic loop {564-598}
transmembrane domain {599-619}
exoplasmic domain {620-620}
phosphatidylinositol N-acetylglucosaminyltransferase subunit C
COMPARTMENT: endoplasmic reticulum
MOTIF: transmembrane domain {51-71}
transmembrane domain {80-100}
transmembrane domain {154-174}
transmembrane domain {239-259}
phosphatidylinositol-glycan biosynthesis class F protein
COMPARTMENT: endoplasmic reticulum
MOTIF: transmembrane domain {11-31}
transmembrane domain {42-62}
transmembrane domain {86-106}
transmembrane domain {113-133}
transmembrane domain {155-175}
transmembrane domain {189-209}
GPI-anchor transamidase
COMPARTMENT: endoplasmic reticulum
MOTIF: signal sequence {1-27}
cysteine residue {C92}
MODIFICATION: cysteine residue {C182 IN PIGT}
histidine residue {H164}
cysteine residue {C206}
Essential for GPI attachment {311-321}
transmembrane domain {368-388}
N-acetylglucosaminyl-phosphatidylinositol de-N-acetylase
COMPARTMENT: endoplasmic reticulum
MOTIF: transmembrane domain {2-22}
PIG0
GPI transamidase component PIG-S
COMPARTMENT: endoplasmic reticulum
MOTIF: cytoplasmic domain {2-18}
transmembrane domain {19-39}
exoplasmic loop {40-520}
MOTIF: N-glycosylation site {N267}
N-glycosylation site {N370}
transmembrane domain {521-541}
cytoplasmic domain {542-555}
GPI transamidase component PIG-T
COMPARTMENT: endoplasmic reticulum
MOTIF: signal sequence {1-21}
N-glycosylation site {N164}
cysteine residue {C182}
MODIFICATION: cysteine residue {C92 IN PIGK/GPI8}
N-glycosylation site {N291}
N-glycosylation site {N327}
transmembrane domain {528-548}
References
UniProt :accession Q969N2
Components
glycosylphosphatidylinositol anchor attachment 1 protein; GPI anchor attachment protein 1; GAA1 protein homolog; hGAA1 (GPAA1, GAA1)
GPI transamidase component PIG-S; phosphatidylinositol-glycan biosynthesis class S protein (PIGS)
GPI transamidase component PIG-T; phosphatidylinositol-glycan biosynthesis class T protein (PIGT)
GPI-anchor transamidase; GPI transamidase; GPI8 homolog; hGPI8; phosphatidylinositol-glycan biosynthesis class K protein; PIG-K (PIGK, GPI8)
N-acetylglucosaminyl-phosphatidylinositol de-N-acetylase; phosphatidylinositol-glycan biosynthesis class L protein; PIG-L (PIGL)
phosphatidylinositol N-acetylglucosaminyltransferase subunit C; phosphatidylinositol-glycan biosynthesis class C protein; PIG-C (PIGC, GPI2)
phosphatidylinositol-glycan biosynthesis class F protein; PIG-F; GPI11 homolog (PIGF)