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Literature summary for 2.4.1.90 extracted from

  • Bella, A.; Whitehead, J.S.; Kim, Y.S.
    Human plasma uridine diphosphate galactose-glycoprotein galactosyltransfertase. Purification, properties and kinetics of the enzyme-catalysed reaction (1977), Biochem. J., 167, 621-628.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
alpha-lactalbumin stimulates transfer of galactose from UDPgalactose to N-acetylgalactosamine Homo sapiens

Inhibitors

Inhibitors Comment Organism Structure
alpha1-Acid glycoprotein above 1.4 mM with respect to acceptor sites Homo sapiens
N-acetylglucosamine above 10 mM Homo sapiens

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0039
-
N-acetylglucosamine
-
Homo sapiens
0.024
-
UDPgalactose
-
Homo sapiens
0.2
-
alpha1-Acid glycoprotein
-
Homo sapiens

Localization

Localization Comment Organism GeneOntology No. Textmining
soluble
-
Homo sapiens
-
-

Metals/Ions

Metals/Ions Comment Organism Structure
Mn2+ required Homo sapiens
Mn2+ Km: 0.4 mM Homo sapiens

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
85000 90000 gel filtration Homo sapiens

Organism

Organism UniProt Comment Textmining
Homo sapiens
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Homo sapiens

Source Tissue

Source Tissue Comment Organism Textmining
plasma
-
Homo sapiens
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.535
-
-
Homo sapiens

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
UDPgalactose + alpha1-acid glycoprotein
-
Homo sapiens ?
-
?
UDPgalactose + degalactosylated fetuin
-
Homo sapiens UDP + fetuin containing beta-1,4-galactose linkages
-
?
UDPgalactose + glucose in presence of alpha-lactalbumin Homo sapiens lactose + UDP
-
?

Subunits

Subunits Comment Organism
? x * 70000-80000, SDS-PAGE Homo sapiens

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
30
-
reaction with N-acetylglucosamine and UDPgalactose, reaction with alpha1-acid glycoprotein and UDPgalactose Homo sapiens

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
reaction with N-acetylglucosamine and UDPgalactose, reaction with alpha1-acid glycoprotein and UDPgalactose Homo sapiens