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Literature summary for 2.4.1.90 extracted from

  • Christner, J.E.; Distler, J.J.; Jourdian, G.W.
    Biosynthesis of keratan sulfate: purification and properties of a galactosyltransferase from bovine cornea (1979), Arch. Biochem. Biophys., 192, 548-558.
    View publication on PubMed

Activating Compound

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

Inhibitors

Inhibitors Comment Organism Structure
alpha-lactalbumin inhibits reaction with UDPgalactose and N-acetylglucosamine Bos taurus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.055
-
UDPgalactose
-
Bos taurus
2.8
-
agalactokeratan
-
Bos taurus
21
-
D-glucose
-
Bos taurus
40
-
N-acetylglucosamine
-
Bos taurus

Localization

Localization Comment Organism GeneOntology No. Textmining
soluble
-
Bos taurus
-
-

Metals/Ions

Metals/Ions Comment Organism Structure
Co2+ activation at 14.9% of the activity with Mn2+ Bos taurus
Mn2+ required Bos taurus
Mn2+ maximal activity at 4 mM Bos taurus
Mn2+ Km for MnCl2: 0.34 mM Bos taurus
Zn2+ activation at 9.2% of the activity with Mn2+ Bos taurus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
42200
-
x * 42200, SDS-PAGE Bos taurus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
UDPgalactose + N-acetylglucosaminyl at the non-reducing ends of protein-bound oligosaccharides Bos taurus biosynthesis of keratan sulfate-like polysaccharides ?
-
?

Organism

Organism UniProt Comment Textmining
Bos taurus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Bos taurus

Source Tissue

Source Tissue Comment Organism Textmining
cornea
-
Bos taurus
-
milk
-
Bos taurus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
10.7
-
-
Bos taurus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
UDP-galactose + methyl 2-acetamido-2-deoxy-beta-D-glucoside 76% of the activity with N-acetylglucosamine Bos taurus UDP + beta-D-galactosyl-1,4-beta-1-O-methyl-2-deoxy-2-acetylamido-beta-D-glucopyranoside
-
?
UDP-galactose + methyl 2-bromo-acetamido-2-deoxy-beta-D-glucoside 75% of the activity with N-acetylglucosamine Bos taurus UDP + beta-D-galactosyl-1,4-1-O-methyl-2-bromo-acetamido-2-deoxy-beta-D-glucoside
-
?
UDP-galactose + methyl 2-deoxy-2-benzamido-beta-D-glucoside 16% of the activity with N-acetylglucosamine Bos taurus UDP + beta-D-galactosyl-1,4-1-O-methyl-2-deoxy-2-benzamido-beta-D-glucoside
-
?
UDPgalactose + 2-acetamido-N-(L-aspart-4-oyl)-1,2-dideoxy-beta-glucoside 65% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + agalacto-ovomucoid 65% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + agalactokeratan agalactokeratan from bovine cornea and nasal septum, at 5% and 13% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + asialo-agalacto-alpha1-glycoprotein 42% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + di-acetylchitobiose 54% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + glucose in presence of alpha-lactalbumin Bos taurus lactose + UDP
-
?
UDPgalactose + N-acetyl-beta-D-glucosaminyl-glycopeptide glycoproteins containing terminal nonreducing N-acetylglucosaminyl units Bos taurus UDP + beta-D-galactosyl-1,4-N-acetyl-beta-D-glucosaminylglycopeptide
-
?
UDPgalactose + N-acetylglucosamine
-
Bos taurus UDP + N-acetyllactosamine
-
?
UDPgalactose + N-acetylglucosaminyl at the non-reducing ends of protein-bound oligosaccharides biosynthesis of keratan sulfate-like polysaccharides Bos taurus ?
-
?
UDPgalactose + p-nitrophenyl 2-acetamido-2-deoxy-beta-glucoside 67% of the activity with N-acetylglucosamine Bos taurus ?
-
?
UDPgalactose + tri-N-acetylchitotriose 64% of the activity with N-acetylglucosamine Bos taurus ?
-
?

Subunits

Subunits Comment Organism
? x * 42200, SDS-PAGE Bos taurus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5 10.5
-
Bos taurus