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GALNT3

Chr 2q24.3

polypeptide N-acetylgalactosaminyltransferase 3

Aliases:
GalNAc-T3, HHS, HFTC
MANE:
ENST00000392701.8

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Congenital disorders of glycosylation

    BIALLELIC, autosomal or pseudoautosomal
  • Familial tumoral calcinosis

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Pigmentary skin disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Skeletal dysplasia

    BIALLELIC, autosomal or pseudoautosomal
  • Undiagnosed metabolic disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Rare genetic inflammatory skin disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Childhood onset dystonia, chorea or related movement disorder

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Disease associations (Open Targets)

  • familial hyperphosphatemic tumoral calcinosis/hyperphosphatemic hyperostosis syndrome

    0.80
  • familial tumoral calcinosis

    0.64
  • type 2 diabetes mellitus

    0.41
  • intelligence

    0.40
  • hyperphosphatemia

    0.37
  • osteoporosis

    0.33
  • diabetes mellitus

    0.31
  • alcohol drinking

    0.26
  • autism spectrum disorder

    0.23
  • attention deficit-hyperactivity disorder

    0.23

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

Protein function (UniProt)

Polypeptide N-acetylgalactosaminyltransferase 3

Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor (PubMed:16638743, PubMed:31932717, PubMed:8663203, PubMed:9295285). Has activity toward HIV envelope glycoprotein gp120, EA2, MUC2, MUC1A and MUC5AC (PubMed:8663203, PubMed:9295285). Probably glycosylates fibronectin in vivo (PubMed:9295285). Glycosylates FGF23 (PubMed:16638743, PubMed:31932717)

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.