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APOA5

Chr 11q23.3

apolipoprotein A5

Aliases:
RAP3, APOA-V
MANE:
ENST00000227665.9

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Familial chylomicronaemia syndrome (FCS)

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
  • Severe hypertriglyceridaemia

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
  • Undiagnosed metabolic disorders

    BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
  • Childhood onset dystonia, chorea or related movement disorder

  • Familial hypercholesterolaemia

    MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Disease associations (Open Targets)

  • hyperlipoproteinemia type V

    0.77
  • Hyperlipoproteinemia type 4

    0.74
  • hypertriglyceridemia

    0.66
  • Hyperlipoproteinemia type 5

    0.63
  • metabolic syndrome

    0.61
  • coronary artery disorder

    0.60
  • hyperlipidemia

    0.57
  • metabolic disease

    0.56
  • Hypercholesterolemia

    0.56
  • Abnormality of the cardiovascular system

    0.55

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

Protein function (UniProt)

Apolipoprotein A-V

Minor apolipoprotein mainly associated with HDL and to a lesser extent with VLDL. May also be associated with chylomicrons. Important determinant of plasma triglyceride (TG) levels by both being a potent stimulator of apo-CII lipoprotein lipase (LPL) TG hydrolysis and an inhibitor of the hepatic VLDL-TG production rate (without affecting the VLDL-apoB production rate) (By similarity). Activates poorly lecithin:cholesterol acyltransferase (LCAT) and does not enhance efflux of cholesterol from macrophages. Binds heparin (PubMed:17326667)

Curated MONDO disease pages that list APOA5 among their top associated genes.

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.