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Information on EC 2.4.1.198 - phosphatidylinositol N-acetylglucosaminyltransferase

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EC Tree
IUBMB Comments
Involved in the first step of glycosylphosphatidylinositol (GPI) anchor formation in all eukaryotes. In mammalian cells, the enzyme is composed of at least five subunits (PIG-A, PIG-H, PIG-C, GPI1 and PIG-P). PIG-A subunit is the catalytic subunit. In some species, the long-chain acyl groups of the phosphatidyl group are partly replaced by long-chain alkyl or alk-1-enyl groups.
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This record set is specific for:
UNIPROT: Q9BRB3
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Word Map
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria, Archaea
Synonyms
pig-a, gpi-gnt, dscr5, gpi19, gpi-n-acetylglucosaminyltransferase, gpi-glcnac transferase, phosphatidylinositol n-acetylglucosaminyltransferase, phosphatidylinositol n-acetylglucosaminyltransferase subunit a, gpi15, gpi-n-acetylglucosaminyltransferase complex, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
GPI-GlcNAc transferase
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acetyl-D-glucosaminyltransferase, uridine diphosphoacetylglucosamine alpha1,6-
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UDP-N-acetyl-D-glucosamine:phosphatidylinositol N-acetyl-D-glucosaminyltransferase
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uridine diphosphoacetylglucosamine alpha1,6-acetyl-D-glucosaminyltransferase
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
hexosyl group transfer
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SYSTEMATIC NAME
IUBMB Comments
UDP-N-acetyl-D-glucosamine:1-phosphatidyl-1D-myo-inositol 6-(N-acetyl-alpha-D-glucosaminyl)transferase
Involved in the first step of glycosylphosphatidylinositol (GPI) anchor formation in all eukaryotes. In mammalian cells, the enzyme is composed of at least five subunits (PIG-A, PIG-H, PIG-C, GPI1 and PIG-P). PIG-A subunit is the catalytic subunit. In some species, the long-chain acyl groups of the phosphatidyl group are partly replaced by long-chain alkyl or alk-1-enyl groups.
CAS REGISTRY NUMBER
COMMENTARY hide
144388-35-2
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
UDP-N-acetyl-D-glucosamine + phosphatidylinositol
UDP + N-acetyl-D-glucosaminyl-phosphatidylinositol
show the reaction diagram
additional information
?
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NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
UDP-N-acetyl-D-glucosamine + phosphatidylinositol
UDP + N-acetyl-D-glucosaminyl-phosphatidylinositol
show the reaction diagram
additional information
?
-
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
PIGQ_HUMAN
760
0
84082
Swiss-Prot
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MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
purification of GPI1 by overexpression of PIG-A in JY5 cells and isolation of the complex by affinity chromatography
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
hGPI1, DNA sequence determination, coexpression as GST-tagged protein in human B lymphoblastoid JY25 or JY5 cells with the other three GST- or FLAG-tagged protein of the active protein complex
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Watanabe, R.; Inoue, N.; Westfall, B.; Taron, C.H.; Orlean, P.; Takeda, J.; Kinoshita, T.
The first step of glycosylphosphatidylinositol biosynthesis is mediated by a complex of PIG-A, PIG-H, PIG-C and GPI1
EMBO J.
17
877-885
1998
Homo sapiens, Homo sapiens (Q9BRB3), Saccharomyces cerevisiae
Manually annotated by BRENDA team
Watanabe, R.; Murakami, Y.; Marmor, M.; Inoue, N.; Maeda, Y.; Hino, J.; Kangawa, K.; Julius, M.; Kinoshita, T.
Initial enzyme for glycosylphosphatidylinositol biosynthesis requires PIG-P and is regulated by DPM2
EMBO J.
19
4402-4411
2000
Homo sapiens, Homo sapiens (P57054), Homo sapiens (Q9BRB3), Mus musculus (Q9JHG1)
Manually annotated by BRENDA team