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PHKA1

Chr Xq13.1

phosphorylase kinase regulatory subunit alpha 1

MANE:
ENST00000373542.9

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Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Acute rhabdomyolysis

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Glycogen storage disease

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Likely inborn error of metabolism

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Rhabdomyolysis and metabolic muscle disorders

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Undiagnosed metabolic disorders

    X-LINKED: hemizygous mutation in males, biallelic mutations in females
  • Childhood onset dystonia, chorea or related movement disorder

  • Intellectual disability

    X-LINKED: hemizygous mutation in males, monoallelic mutations in females may cause disease (may be less severe, later onset than males)

Disease associations (Open Targets)

  • glycogen storage disease IXd

    0.80
  • Glycogen storage disease due to phosphorylase kinase deficiency

    0.48
  • hereditary disease

    0.47
  • Cornelia de Lange syndrome

    0.34
  • autoimmune disorder of central nervous system

    0.31
  • disorder of glycogen metabolism

    0.27
  • ornithine carbamoyltransferase deficiency

    0.27
  • neurodegenerative disease

    0.19
  • Intellectual disability

    0.12
  • peripheral neuropathy

    0.12

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

Protein function (UniProt)

Phosphorylase b kinase regulatory subunit alpha, skeletal muscle isoform

Phosphorylase b kinase catalyzes the phosphorylation of serine in certain substrates, including troponin I. The alpha chain may bind calmodulin

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.