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B3GALNT2

Chr 1q42.3

beta-1,3-N-acetylgalactosaminyltransferase 2

Aliases:
MGC39558
MANE:
ENST00000366600.8

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Arthrogryposis

    BIALLELIC, autosomal or pseudoautosomal
  • Ataxia and cerebellar anomalies - narrow panel

    BIALLELIC, autosomal or pseudoautosomal
  • Cerebellar hypoplasia

    BIALLELIC, autosomal or pseudoautosomal
  • Congenital disorders of glycosylation

    BIALLELIC, autosomal or pseudoautosomal
  • Congenital muscular dystrophy

    BIALLELIC, autosomal or pseudoautosomal
  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Hereditary ataxia with onset in adulthood

    BIALLELIC, autosomal or pseudoautosomal

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Disease associations (Open Targets)

  • muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type a, 11

    0.83
  • muscular dystrophy-dystroglycanopathy, type A

    0.60
  • congenital muscular dystrophy

    0.51
  • congenital muscular dystrophy due to LMNA mutation

    0.51
  • muscle-eye-brain disease

    0.50
  • hereditary disease

    0.38
  • autosomal recessive non-syndromic intellectual disability

    0.37
  • muscular dystrophy-dystroglycanopathy

    0.34
  • parasitic infectious disease

    0.23
  • type 2 diabetes mellitus

    0.22

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

UDP-GalNAc:beta-1,3-N-acetylgalactosaminyltransferase 2

Beta-1,3-N-acetylgalactosaminyltransferase that synthesizes a unique carbohydrate structure, GalNAc-beta-1-3GlcNAc, on N- and O-glycans. Has no galactose nor galactosaminyl transferase activity toward any acceptor substrate. Involved in alpha-dystroglycan (DAG1) glycosylation: acts coordinately with GTDC2/POMGnT2 to synthesize a GalNAc-beta3-GlcNAc-beta-terminus at the 4-position of protein O-mannose in the biosynthesis of the phosphorylated O-mannosyl trisaccharide (N-acetylgalactosamine-beta-3-N-acetylglucosamine-beta-4-(phosphate-6-)mannose), a carbohydrate structure present in alpha-dystroglycan, which is required for binding laminin G-like domain-containing extracellular proteins with high affinity

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.