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Glycosyltransferase Curated Online Resource for Enzymology

Family-organised sequence, structure, mechanism and substrate-specificity records for the CAZy glycosyltransferases

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B4galt1

Mus musculus · Beta-1,4-galactosyltransferase 1 (EC 2.4.1.-; 2.4.1.38; 2.4.1.22; 2.4.1.90; 2.4.1.275)

GT7Non-model organism · annotation 4–5Fold GT-AInverting

External resources

UniProt P15535AlphaFold modelInterPro domainsNCBI Gene 14595CAZy GT7

Identification and annotation

CAZy familyGT7 · CAZy entry
Gene symbolB4galt1
Synonyms / alternate names
  • Ggtb
  • Ggtb2
  • Beta-N-acetylglucosaminyl-glycolipid beta-1,4-galactosyltransferase
  • Beta-N-acetylglucosaminylglycopeptide beta-1,4-galactosyltransferase
  • Lactose synthase A protein
  • N-acetyllactosamine synthase
  • Nal synthase
  • Neolactotriaosylceramide beta-1,4-galactosyltransferase
  • UDP-Gal:beta-GlcNAc beta-1,4-galactosyltransferase 1
  • UDP-galactose:beta-N-acetylglucosamine beta-1,4-galactosyltransferase 1
UniProt accessionP15535
NCBI Gene ID14595
Source speciesMus musculus
Taxonomic domainEukaryota
UniProt annotation level5

Function and localisation

Enzyme functionBeta-1,4-galactosyltransferase 1 (EC 2.4.1.-; 2.4.1.38; 2.4.1.22; 2.4.1.90; 2.4.1.275)
Subcellular location
  • Golgi apparatus
  • Golgi stack membrane

Structure and mechanism

Fold typeGT-A
Catalytic mechanismInverting
Cation dependenceYes (Mn2+)
Oligomeric statehomodimer
PDB structuresnot curated

Donor and acceptor specificity

Sugar nucleotide donorUDP-alpha-D-galactose
Donor CCD code(s)GDU
Acceptor substrate(s)
  • D-glucose
  • an N-acetyl-beta-D-glucosaminyl derivative
  • N-acetyl-D-glucosamine
  • a beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-Cer(d18:1(4E))
  • a beta-D-glucosylceramide
  • a neolactoside IV(3)-beta-GlcNAc-nLc4Cer
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[alpha-Neu5Ac-(2->6)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[alpha-Neu5Ac-(2->6)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-[alpha-L-Fuc-(1->6)]-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-(1->3)-[alpha-D-Man-(1->6)]-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[alpha-Neu5Ac-(2->6)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{alpha-Neu5Ac-(2->6)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{alpha-Neu5Ac-(2->3)-beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-GlcNAc-(1->4)]-[beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
  • an N(4)-{beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->3)-[beta-D-Gal-(1->4)-beta-D-GlcNAc-(1->2)-alpha-D-Man-(1->6)]-beta-D-Man-(1->4)-beta-D-GlcNAc-(1->4)-beta-D-GlcNAc}-L-asparaginyl-[protein]
Acceptor CCD / GlycoCTnot curated

Protein sequences

Full protein sequence

399 aa 
MRFREQFLGGSAAMPGATLQRACRLLVAVCALHLGVTLVYYLSGRDLSRLPQLVGVSSTLQGGTNGAAASKQPPGEQRPRGARPPPPLGVSPKPRPGLDSSPGAASGPGLKSNLSSLPVPTTTGLLSLPACPEESPLLVGPMLIDFNIAVDLELLAKKNPEIKTGGRYSPKDCVSPHKVAIIIPFRNRQEHLKYWLYYLHPILQRQQLDYGIYVINQAGDTMFNRAKLLNIGFQEALKDYDYNCFVFSDVDLIPMDDRNAYRCFSQPRHISVAMDKFGFSLPYVQYFGGVSALSKQQFLAINGFPNNYWGWGGEDDDIFNRLVHKGMSISRPNAVVGRCRMIRHSRDKKNEPNPQRFDRIAHTKETMRFDGLNSLTYKVLDVQRYPLYTQITVDIGTPR

Catalytic domain sequence

219 aa 
PHKVAIIIPFRNRQEHLKYWLYYLHPILQRQQLDYGIYVINQAGDTMFNRAKLLNIGFQEALKDYDYNCFVFSDVDLIPMDDRNAYRCFSQPRHISVAMDKFGFSLPYVQYFGGVSALSKQQFLAINGFPNNYWGWGGEDDDIFNRLVHKGMSISRPNAVVGRCRMIRHSRDKKNEPNPQRFDRIAHTKETMRFDGLNSLTYKVLDVQRYPLYTQITVD
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