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1o23

X-ray diffraction
2.32Å resolution

Function and Biology Details

Reactions catalysed:
D-glucose + UDP-alpha-D-galactose = lactose + UDP + H(+).
a beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-beta-D-Glc-(1<->1)-Cer(d18:1(4E)) + UDP-alpha-D-galactose = a neolactosidenLc4Cer(d18:1(4E)) + UDP + H(+).
an N-acetyl-beta-D-glucosaminyl derivative + UDP-alpha-D-galactose =a beta-D-galactosyl-(1->4)-N-acetyl-beta-D-glucosaminyl derivative +UDP + H(+).
N-acetyl-D-glucosamine + UDP-alpha-D-galactose = beta-D-galactosyl-(1->4)-N-acetyl-D-glucosamine + UDP + H(+).
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
PDBe Complex ID:
PDB-CPX-139893 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Alpha-lactalbumin Chains: A, C
Molecule details ›
Chains: A, C
Length: 123 amino acids
Theoretical weight: 14.02 KDa
Source organism: Mus musculus
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P29752 (Residues: 21-143; Coverage: 100%)
Gene name: Lalba
Sequence domains: C-type lysozyme/alpha-lactalbumin family
Structure domains: Lysozyme
Beta-1,4-galactosyltransferase 1 Chains: B, D
Molecule details ›
Chains: B, D
Length: 286 amino acids
Theoretical weight: 32.85 KDa
Source organism: Bos taurus
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: P08037 (Residues: 130-402; Coverage: 68%)
Gene names: B4GALT1, GALT, GGTB2
Sequence domains:
Structure domains: Spore Coat Polysaccharide Biosynthesis Protein SpsA; Chain A

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X9B
Spacegroup: P21
Unit cell:
a: 55.545Å b: 99.379Å c: 102.568Å
α: 90° β: 104.09° γ: 90°
R-values:
R R work R free
0.201 0.201 0.265
Expression system: Escherichia coli BL21