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CYB5A

Chr 18q22.3

cytochrome b5 type A

Aliases:
MCB5
MANE:
ENST00000340533.9

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Differences in sex development

    BIALLELIC, autosomal or pseudoautosomal
  • Rare anaemia

    BIALLELIC, autosomal or pseudoautosomal

Disease associations (Open Targets)

  • hereditary methemoglobinemia

    0.52
  • 46,XY disorder of sex development due to isolated 17,20 lyase deficiency

    0.37
  • methemoglobinemia due to deficiency of methemoglobin reductase

    0.37
  • Abnormality of the skeletal system

    0.35
  • skin wound

    0.28
  • Abnormality of the immune system

    0.28
  • cholelithiasis

    0.27
  • sinusitis

    0.24
  • hepatocellular carcinoma

    0.09
  • Isolated anophthalmia - microphthalmia

    0.07

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

Protein function (UniProt)

Cytochrome b5

Cytochrome b5 is a membrane-bound hemoprotein functioning as an electron carrier for several membrane-bound oxygenases

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.