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TK2

Chr 16q21

thymidine kinase 2

Aliases:
SCA31
MANE:
ENST00000544898.6

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Acute rhabdomyolysis

    BIALLELIC, autosomal or pseudoautosomal
  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial DNA maintenance disorder

    BIALLELIC, autosomal or pseudoautosomal
  • Possible mitochondrial disorder - nuclear genes

    BIALLELIC, autosomal or pseudoautosomal
  • Rhabdomyolysis and metabolic muscle disorders

    BIALLELIC, autosomal or pseudoautosomal

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Disease associations (Open Targets)

  • mitochondrial DNA depletion syndrome, myopathic form

    0.83
  • progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal recessive 3

    0.76
  • mitochondrial disease

    0.65
  • autosomal recessive progressive external ophthalmoplegia

    0.64
  • mitochondrial DNA depletion syndrome

    0.55
  • neurodegenerative disease

    0.42
  • hereditary disease

    0.41
  • inborn mitochondrial metabolism disorder

    0.37
  • myopathy

    0.34
  • Abnormality of the musculature

    0.27

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

Protein function (UniProt)

Thymidine kinase 2, mitochondrial

Phosphorylates thymidine, deoxycytidine, and deoxyuridine in the mitochondrial matrix (PubMed:11687801, PubMed:9989599). In non-replicating cells, where cytosolic dNTP synthesis is down-regulated, mtDNA synthesis depends solely on TK2 and DGUOK (PubMed:9989599). Widely used as target of antiviral and chemotherapeutic agents (PubMed:9989599)

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.