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Information on EC 2.4.1.37 - fucosylgalactoside 3-alpha-galactosyltransferase
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EC Tree
2.4.1.37 fucosylgalactoside 3-alpha-galactosyltransferaseIUBMB Comments
Acts on blood group substance, and can use a number of 2-fucosyl-galactosides as acceptors.
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Word Map
- 2.4.1.37
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serological
- udp-galnac
- trisaccharide
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abo-incompatible
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galalpha1-3galbeta1-4glcnac-r
The enzyme appears in viruses and cellular organisms
Reaction Schemes
Synonyms
b transferase, b glycosyltransferase, blood group b galactosyltransferase, alpha(1-3)galactosyltransferase, blood group b glycosyltransferase, histo-blood group abo system transferase, blood group b alpha-(1,3)-galactosyltransferase, abo(h) blood group b glycosyltransferase, blood group b glycosyltransferase gtb, glycosyltransferases b, 
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SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
blood group B galactosyltransferase
blood group B glycosyltransferase
blood-group substance B-dependent galactosyltransferase
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glycoprotein-fucosylgalactoside alpha-galactosyltransferase
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GTB
histo-blood group B transferase
histo-blood substance B-dependent galactosyltransferase
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UDP-galactose:O-alpha-L-fucosyl(1-2)D-galactose alpha-D-galactosyltransferase
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UDPgalactose:glycoprotein-alpha-L-fucosyl-(1,2)-D-galactose 3-alpha-D-galactosyltransferase
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[blood group substance] alpha-galactosyltransferase
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additional information
the enzyme belongs to the ABO glycosyltransferases
blood group B glycosyltransferase
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GTB
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GTB
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histo-blood group B transferase
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
UDP-alpha-D-galactose + alpha-L-fucosyl-(1->2)-D-galactosyl-R = UDP + alpha-D-galactosyl-(1->3)-[alpha-L-fucosyl(1->2)]-D-galactosyl-R
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
hexosyl group transfer
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SYSTEMATIC NAME
IUBMB Comments
UDP-galactose:alpha-L-fucosyl-(1->2)-D-galactoside 3-alpha-D-galactosyltransferase
Acts on blood group substance, and can use a number of 2-fucosyl-galactosides as acceptors.
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CAS REGISTRY NUMBER
COMMENTARY
37257-33-3
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide + UDP-GalNAc
?
-
-
-
-
?
UDP-2-deoxygalactose + L-fucosyl-alpha-1,2-beta-galactosyl-OR
UDP + 2-deoxy-alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-OR
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tetramethylrhodamine labelled disaccharide
-
-
?
UDP-6-deoxygalactose + L-fucosyl-alpha-1,2-beta-galactosyl-OR
UDP + 6-deoxy-alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-OR
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tetramethylrhodamine labelled disaccharide
-
-
?
UDP-alpha-D-galactose + 8-methoxycarbonyloctyl beta-D-Galp-(1->4)-beta-D-Glcp
?
-
-
-
-
?
UDP-alpha-D-galactose + alpha-Fuc-(1->2)-beta-D-Gal-(CH2)7CH3
UDP + alpha-D-Gal-(1->3)-[alpha-Fuc-(1->2)]-beta-D-Gal-(CH2)7CH3
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
UDP-alpha-D-galactose + beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + alpha-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP-D-galactose + 2'-fucosyllactose
UDP + D-galactosyl-(1-3)-2'-fucosyllactose
-
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-(1,3)-beta-DGlcNAcp-O(CH2)7CH3
UDP + alpha-L-Fuc-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-(1,3)-beta-DGlcNAcp-O(CH2)7CH3
69% of the activity with alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-(1,4)-beta-D-GlcNAcp-O-(CH2)8CO2CH3
UDP + alpha-L-Fucp-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-(1,4)-beta-D-GlcNAcp-O-(CH2)8CO2CH3
90% of the activity with alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
UDP + alpha-L-Fuc-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-O(CH2)7CH3
UDP-D-galactose + Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-(4-nitrophenol)
UDP + alpha-D-Gal-1,3-Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-(4-nitrophenol)
-
-
-
-
?
UDP-D-galactose + Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-benzyl
UDP + alpha-D-Gal(1,3)Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-benzyl
-
-
-
-
?
UDP-D-galactose + Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-Skp1 protein
UDP + alpha-D-Gal(1,3)Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-Skp1 protein
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best substrate, Skp1A1-(HW120)-myc and Skp1 from strain HL250
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-
?
UDP-D-galactose + Fucalpha(1,2)Galbeta-1-(4-nitrophenol)
UDP + alpha-D-Gal(1,3)Fucalpha(1,2)Galbeta-1-(4-nitrophenol)
-
-
-
-
?
UDP-D-galactose + Fucalpha(1,2)Galbeta-1-benzyl
UDP + alpha-D-Gal(1,3)Fucalpha(1,2)Galbeta-1-benzyl
-
-
-
-
?
UDP-D-galactose + Fucalpha-1-(4-nitrophenol)
UDP + alpha-D-Gal(1,3)Fucalpha-1-(4-nitrophenol)
-
-
-
-
?
UDP-D-galactose + Fucalpha-1-benzyl
UDP + alpha-D-Gal(1,3)Fucalpha-1-benzyl
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-
-
-
?
UDP-D-galactose + fucosylated Skp1 protein
UDP + alpha-D-galactosyl(1-3)-fucosyl-Skp1 protein
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-
-
-
?
UDP-D-galactose + H type 3-Sp-biotin
UDP + ?
preferred substrates
-
-
?
UDP-D-galactose + H-disaccharide
UDP + alpha-D-galactosyl-1,3-H disaccharide
-
synthetic substrate
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-
?
UDP-galactose + alpha-L-Fuc-(1,2)-beta-D-Gal-O-octyl
UDP + alpha-L-Fuc(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Gal-O-octyl
it is propose that, upon acceptor binding, GTB uses the Asp302 and Glu303 side chains as molecular tweezers to promote bound UDP-Gal but not UDP-Glc into a transition state that leads to product formation
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-beta-D-galactosyl-O-(CH2)7CH3
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-beta-D-galactosyl-O-(CH2)7CH3
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i.e. alpha-L-Fucp-(1,2)-beta-DGalp-O-(CH2)7CH3
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-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
UDP-galactose + alpha-L-fucosyl-(1-2)-D-galactosyl-O-R
UDP + alpha-D-galactosyl-(1-3)-[alpha-L-fucosyl-(1-2)]-D-galactosyl-O-R
UDP-galactose + blood group antigen
UDP + alpha-D-galactosyl-blood group antigen
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GTB catalyzes the transfer of galactose from UDP-Gal to the C3 position of the terminal galactose of H antigen acceptors
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-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
UDP-galactose + L-2'-L-fucosyllactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-D-glucose
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-
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-alpha-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3[alpha-L-fucosyl-1,2]-alpha-D-galactosyl-O(CH2)7CH3
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-
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
UDP-galactose + lacto-N-fucopentaose I
UDP + alpha-D-galactosyl-1,3-[lacto-N-fucopentaose I]
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-
-
-
?
UDP-galactose + N-acetyllactosamine
UDP + alpha-D-galactosyl-1,3-[N-acetyl-lactosamine]
-
-
-
-
?
UDP-galactose + O-alpha-L-fucosyl-1,2-galactose
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactopyranoside
-
-
-
-
?
UDP-galactose + octyl 3-O-methyl-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[3-O-methyl-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl 4-O-methyl-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[4-O-methyl-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl 6'-amino-6'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[6'-amino-6'-deoxy-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl 6'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[6'-deoxy-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl 6'-fluoro-6'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[6'-fluoro-6'-deoxy-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl 6'-O-methyl-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[6'-O-methyl-alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + octyl alpha-L-xylo-hexopyranosyl-(1-2)-beta-D-galactopyranoside
UDP + alpha-D-galactosyl-1,3-[alpha-L-xylo-hexopyranosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-glucose + Fucalpha1-2Galbeta-O(CH2)7CH3
?
wild-type enzyme shows very low activity. Mutants, Ser185Asn and Ser185Cys, exhibit 4.3fold and 4.8fold elevation in kcat/Km for UDP-glucose relative to that of wild-type enzyme
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-
?
UDP-glucose + L-fucosyl-alpha-1,2-beta-galactosyl-O(CH2)7CH3
UDP + alpha-D-glucosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
UDP-N-acetyl-D-galactosamine + 2'-fucosyllactose
UDP + N-acetyl-alpha-D-galactosaminyl-(1->3)-[alpha-L-fucosyl-(1->2)]-beta-D-galactosyl-(1->4)-beta-D-glucose
low A-type activity
-
-
?
UDP-N-acetyl-D-galactosamine + H type 3-Sp-biotin
UDP + ?
low A-type activity
-
-
?
UDP-N-acetylgalactosamine + 2'-fucosyllactose
UDP + N-acetyl-alpha-D-galactosyl-1,3-[2'-fucosyllactose]
-
-
-
-
?
UDP-N-acetylgalactosamine + L-2'-fucosyllactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-D-glucose
-
-
-
-
?
UDP-N-acetylgalactosamine + L-fucosyl-alpha-1,2-alpha-D-galactosyl-O(CH2)7CH3
UDP + N-acetyl-alpha-D-galactosyl-1,3[alpha-L-fucosyl-1,2]-alpha-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-N-acetylgalactosamine + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + N-acetyl-alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-alpha-D-galactose + alpha-Fuc-(1->2)-beta-D-Gal-(CH2)7CH3
UDP + alpha-D-Gal-(1->3)-[alpha-Fuc-(1->2)]-beta-D-Gal-(CH2)7CH3
-
-
-
?
UDP-alpha-D-galactose + alpha-Fuc-(1->2)-beta-D-Gal-(CH2)7CH3
UDP + alpha-D-Gal-(1->3)-[alpha-Fuc-(1->2)]-beta-D-Gal-(CH2)7CH3
-
-
-
?
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
-
?
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
?
UDP-alpha-D-galactose + beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + alpha-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
-
-
-
-
?
UDP-alpha-D-galactose + beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + alpha-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
-
GTB, the blood group B enzyme is able to catalyze the synthesis of iGb3 in vitro, however, the rate observed is too low in order to account for iGb3 synthesis in vivo
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
UDP + alpha-L-Fuc-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-O(CH2)7CH3
-
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
UDP + alpha-L-Fuc-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-O(CH2)7CH3
-
-
-
-
?
UDP-D-galactose + alpha-L-Fucp-(1,2)-beta-D-Galp-O(CH2)7CH3
UDP + alpha-L-Fuc-(1,2)-[alpha-D-Galp-(1,3)-]-beta-D-Galp-O(CH2)7CH3
-
-
-
?
UDP-galactose + 2'-fucosyllactose
UDP + alpha-D-galactosyl-1,3-[2'-fucosyllactose]
-
-
-
-
?
UDP-galactose + 2'-fucosyllactose
UDP + alpha-D-galactosyl-1,3-[2'-fucosyllactose]
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
-
i.e. H disaccharide
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
-
i.e. H disaccharide
in the absence of UDP and Mn2+, GTB recognizes its trisaccharide product with a low affinity of about 1 mM, while the presence of UDP and Mn2+ precludes B-trisaccharide binding
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
substrate binding structure and residues involved, overview
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
-
importance of residue M214 for donor enzyme specificity
-
-
?
UDP-galactose + alpha-L-fucosyl-(1-2)-D-galactosyl-O-R
UDP + alpha-D-galactosyl-(1-3)-[alpha-L-fucosyl-(1-2)]-D-galactosyl-O-R
H-antigen disaccharide
-
-
?
UDP-galactose + alpha-L-fucosyl-(1-2)-D-galactosyl-O-R
UDP + alpha-D-galactosyl-(1-3)-[alpha-L-fucosyl-(1-2)]-D-galactosyl-O-R
H-antigen disaccharide, Met226 is responsible for substrate specificity for D-galactose as donor substrate, acceptor substrate binding pocket structure, overview
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
-
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
GTB catalyzes the transfer of galactose from UDP-Gal to the C3 position of the terminal galactose of H antigen acceptors
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
the alpha1,3-galactosyl epitope is a major xenotransplant antigen
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
alpha-L-fucosyl-(1,2)-D-galactosyl-antigen H
alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-antigen H
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
converts blood group 0 red blood cells to B-cells
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
enzyme transfers D-galactose in alpha-linkage to oligosaccharides, glycolipids and glycoproteins with terminal non-reducing H-active structures and confers blood group B activity on group 0 erythrocytes
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
acts on blood group substance
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
-
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
acts on blood group substance
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
?
UDP-galactose + L-fucosyl-alpha-1,2-beta-D-galactosyl-O(CH2)7CH3
UDP + alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
tetramethylrhodamine labelled disaccharide
-
-
?
UDP-glucose + L-fucosyl-alpha-1,2-beta-galactosyl-O(CH2)7CH3
UDP + alpha-D-glucosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
?
UDP-glucose + L-fucosyl-alpha-1,2-beta-galactosyl-O(CH2)7CH3
UDP + alpha-D-glucosyl-1,3-[alpha-L-fucosyl-1,2]-beta-D-galactosyl-O(CH2)7CH3
-
-
-
-
?
additional information
?
-
-
substrate specificity, enzyme forms Galalpha1,3Fuc-linkages, specific for L-fucose residues
-
-
?
additional information
?
-
-
fragment-based screening of the donor substrate specificity. Enzyme binds several UDP-activated sugars, including UDP-Glc, UDP-GlcNAc, and UDP-GalNAc. In all cases, UDP is the dominant binding epitope. The binding of donor substrate to GTB is essentially controlled by the base as a molecular anchor. Uracil represents the smallest fragment that is recognized. CDP, AMP, and GDP do not exhibit any significant binding affinity for the enzyme. The ribose and beta-phosphate moieties increase the affinity of the ligands. The pyranose sugar weakens the binding, although this part of the molecule controls the specificity of the enzyme. UDP represents the best binder. The binding affinities of UDP-Gal, UDP-Glc, and UMP are about the same, but lower than that of UDP. beta-D-Galactose and alpha-D-galactose bind weakly to GTB. Whereas beta-D-galactose binds to the acceptor and donor sites, it is suggested that alpha-D-galactose occupies a third hitherto unknown binding pocket
-
-
?
additional information
?
-
-
development and evaluation of a general screening assay method for glycosyltransferase activities, overview
-
-
?
additional information
?
-
-
histo-blood group B transferase transfers alpha-D-galatose to the antigen,H, while the B type enzyme transfers N-acetylgalactosamine, overview
-
-
?
additional information
?
-
the enzyme shows weakened activity with B antigen variants resulting from ABO polymophisms, phenotyping and genotyping of ABO antigens, overview
-
-
?
additional information
?
-
-
enzyme-substrate interaction analysis by electrospray ionization mass spectrometry, binding of substrate and product analogues, overview
-
-
?
additional information
?
-
-
galactose is used as an acceptor analogue and UDP as a donor analogue in all soaking trials
-
-
?
additional information
?
-
mouse ABO gene-encoded cis-AB transferase contains the GlyGlyAla tripeptide sequence, which is also found in the majority of GBGT1 genes encoding Forssman glycolipid synthase, EC 2.4.1.88. Mouse cis-AB transferase with the GlyGlyAla tripeptide sequence, but not the human cis-AB transferase with the LeuGlyAla, exhibits Forssman glycolipid synthase activity equivalent of mouse GBGT1 gene-encoded Forssman glycolipid synthase
-
-
-
additional information
?
-
-
2 distinct alpha-3-D-galactosyltransferases: one which is more tightly membrane-bound, resembles the human B-gene-specific transferase in its acceptor specificity, and the second, which is a more soluble enzyme transfers D-galactose to the same positional linkage in unsubstituted beta-D-galactosyl residues
-
-
?
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NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
UDP-D-galactose + fucosylated Skp1 protein
UDP + alpha-D-galactosyl(1-3)-fucosyl-Skp1 protein
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
UDP-galactose + alpha-L-fucosyl-(1-2)-D-galactosyl-O-R
UDP + alpha-D-galactosyl-(1-3)-[alpha-L-fucosyl-(1-2)]-D-galactosyl-O-R
H-antigen disaccharide
-
-
?
UDP-galactose + blood group antigen
UDP + alpha-D-galactosyl-blood group antigen
-
GTB catalyzes the transfer of galactose from UDP-Gal to the C3 position of the terminal galactose of H antigen acceptors
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
-
?
UDP-alpha-D-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactosyl-R
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactose
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl(1,2)]-D-galactose
-
i.e. H disaccharide
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
-
-
-
-
?
UDP-galactose + alpha-L-fucosyl-(1,2)-D-galactosyl-R
UDP + alpha-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,2)]-D-galactosyl-R
-
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
-
-
-
?
UDP-galactose + blood group antigen H
UDP + alpha-D-galactosyl-blood group antigen H
-
the alpha1,3-galactosyl epitope is a major xenotransplant antigen
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
acts on blood group substance
-
-
?
UDP-galactose + glycoprotein alpha-L-fucosyl-1,2-D-galactose
UDP + glycoprotein alpha-D-galactosyl-1,3-[alpha-L-fucosyl-1,2]-D-galactose
-
acts on blood group substance
-
-
?
additional information
?
-
-
histo-blood group B transferase transfers alpha-D-galatose to the antigen,H, while the B type enzyme transfers N-acetylgalactosamine, overview
-
-
?
additional information
?
-
the enzyme shows weakened activity with B antigen variants resulting from ABO polymophisms, phenotyping and genotyping of ABO antigens, overview
-
-
?
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Ca2+
-
0.1 mM, significant increase in activity, more significant acceleration at 10 mM
Hg
structures of the mercury derivative of GTB and GTB C209A, mercury does not affect the conformation of active-site residues, the structure of GTB C209A demonstrates that the mercury coordinated by Cys209 is partially responsible for the disorder of the 16-amino-acid internal loop observed in the heavy-atom structure of GTB
Mg2+
Mn2+
Mg2+
-
0.1 mM, significant increase in activity, more significant acceleration at 10 mM
Mn2+
-
divalent cation required, Mn2+ most effective, optimum concentration 20 mM
Mn2+
the enzyme has a characteristic 211DVD213 motif that coordinates to a Mn2+ ion shown to be critical in donor binding and catalysis
Mn2+
-
activates 9fold at 24°C, GTB requires divalent metal ions for full activity
Mn2+
-
required, in the absence of divalent metal ion, GTB does not exhibit any appreciable affinity for its native donor UDP-Gal
Mn2+
-
divalent cation required, Mn2+ most effective, optimum concentration 20 mM
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INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
9-(5-O-alpha-D-galactopyranosyl)-D-arabinityl-1,3,7-trihydropurine-2,6,8-trione
-
extremely specific inhibitor
alpha-L-fucosyl-(1-2)-beta-D-(3-amino)-galactosyl-O-R
complex mode inhibitor, binding structure, Met226 is involved by interacting with the C3-position group
alpha-L-fucosyl-(1-2)-beta-D-(3-deoxy)-galactosyl-O-R
competitive inhibitor, binding structure, Met226 is involved by interacting with the C3-position group
Fucalpha(1,2)Galbeta1-benzyl
-
competitive, 37% and 61% inhibition at 1 mM and 4 mM, respectively
octyl 3'-amino-3'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
-
-
octyl 3'-amino-3'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
-
93% inhibition at 0.025 mM
octyl alpha-L-fucopyranosyl-(1-2)-beta-D-gulopyranoside
-
88% inhibition at 0.025 mM, competitive
additional information
-
not inhibited by ethanolamine, 2-amino-2-deoxy glucosamine, and 2-amino-2-deoxy-mannosamine
-
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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
alpha-L-Fuc-(1,2)-beta-D-3-deoxy-Gal-O-octyl
-
i.e. 3DD, an acceptor substrate analogue, accelerates enzymatic hydrolysis of UDP-Gal
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DISEASE
TITLE OF PUBLICATION
LINK TO PUBMED
Embolic Stroke
Novel Drug Targets for Ischemic Stroke Identified Through Mendelian Randomization Analysis of the Blood Proteome.
Neoplasms
ABH blood group antigen expression, synthesis, and degradation in human colonic adenocarcinoma cell lines.
Neoplasms
Blood group antigen synthesis and degradation in normal and cancerous colonic tissues.
Neoplasms
Novel Drug Targets for Ischemic Stroke Identified Through Mendelian Randomization Analysis of the Blood Proteome.
Urinary Bladder Neoplasms
Genotypic and phenotypic characterization of the histoblood group ABO(H) in primary bladder tumors.
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
1.6
alpha-L-Fucp-(1,2)-beta-D-Galp-(1,3)-beta-DGlcNAcp-O(CH2)7CH3
37°C, pH 7.0
0.184
alpha-L-Fucp-(1,2)-beta-D-Galp-(1,4)-beta-D-GlcNAcp-O-(CH2)8CO2CH3
37°C, pH 7.0
1.2
Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-(4-nitrophenol)
-
pH 7.4, 22°C
0.006
Fucalpha(1,2)Galbeta(1,3)GlcNAcalpha-1-Skp1 protein
-
pH 7.4, 22°C
0.565
octyl 6'-amino-6'-deoxy-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
-
-
0.538
octyl 6'-O-methyl-alpha-L-fucopyranosyl-(1-2)-beta-D-galactopyranoside
-
-
0.4
octyl alpha-L-xylo-hexopyranosyl-(1-2)-beta-D-galactopyranoside
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