2.4.1.165: N-acetylneuraminylgalactosylglucosylceramide beta-1,4-N-acetylgalactosaminyltransferase
This is an abbreviated version!
For detailed information about N-acetylneuraminylgalactosylglucosylceramide beta-1,4-N-acetylgalactosaminyltransferase, go to the full flat file.
Reaction
Synonyms
acetylgalactosaminyltransferase, uridine diphosphoacetylgalactosamine-acetylneuraminyl(alpha2-->3)galactosyl(beta1-->4)glucosyl beta1-->4-, beta-1,4-N-acetylgalactosyltransferase II, beta4GalNAc-T, beta4GalNAcT-II, CT GalNAc transferase, cytotoxic T cell GalNAc transferase, Galgt2, More, Sd(alpha) beta4GalNAcT-II, Sda-beta-1,4-N-acetylgalactosaminyltransferase, Sda-beta-GalNAc-transferase, UDP-GalNAc:beta1,4-N-acetylgalactosaminyltransferase
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Natural Substrates Products
Natural Substrates Products on EC 2.4.1.165 - N-acetylneuraminylgalactosylglucosylceramide beta-1,4-N-acetylgalactosaminyltransferase
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REACTION DIAGRAM
UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP-N-acetyl-D-galactosamine + NeuAcalpha(2-3)Galbeta(1-4)Glc
UDP + GalNAcbeta(1-4)(NeuAcalpha(2-3))Galbeta(1-4)Glc
responsible for the final step in the formation of the Sda/Cad antigenic epitopes, Sd(alpha) beta4GalNAcT-II mRNA transcript is drastically reduced in oncogenetic processes in gastrointestinal tissues
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additional information
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involved in formation of blood group Sda/CAD antigen
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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enzymic activity correlates with the degree of enterocytic differentiation
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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responsible for addition of the immunodominant sugar of the Sda-isto-blood-group determinant
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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overexpression of the enzyme in skeletal muscles inhibits muscular dystrophy in mdx mice. The enzyme produces the terminal beta1,4GalNAc linkage on the cytotoxic T cell carbohydrate antigen which is also localized to the neuromuscular junction in adult animals
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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the enzyme can affect the post-translational processing of dystroglycan and the extent of muscular dystrophy even in muscles where the VIA4-1 antigen is not present
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UDP-N-acetyl-D-galactosamine + alpha-N-acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
UDP + N-acetyl-beta-D-galactosaminyl-(1->4)-[alpha-N-acetylneuraminyl-(2->3)]-beta-D-galactosyl-(1->4)-beta-D-glucosyl-(1<->1)-ceramide
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