Gene Gene information from NCBI Gene database.
Entrez ID 7084
Gene name Thymidine kinase 2
Gene symbol TK2
Synonyms (NCBI Gene)
MTDPS2MTTKPEOB3SCA31TK2-EXT
Chromosome 16
Chromosome location 16q21
Summary This gene encodes a deoxyribonucleoside kinase that specifically phosphorylates thymidine, deoxycytidine, and deoxyuridine. The encoded enzyme localizes to the mitochondria and is required for mitochondrial DNA synthesis. Mutations in this gene are associ
SNPs SNP information provided by dbSNP.
36
SNP ID Visualize variation Clinical significance Consequence
rs137854429 G>T Pathogenic Non coding transcript variant, coding sequence variant, missense variant
rs137854430 A>T Pathogenic Non coding transcript variant, coding sequence variant, missense variant
rs137854431 G>A Pathogenic Non coding transcript variant, coding sequence variant, missense variant
rs137854432 G>C Pathogenic Intron variant, coding sequence variant, missense variant, non coding transcript variant, 5 prime UTR variant
rs137886900 G>A,C,T Uncertain-significance, pathogenic Synonymous variant, intron variant, coding sequence variant, missense variant, non coding transcript variant
miRNA miRNA information provided by mirtarbase database.
222
miRTarBase ID miRNA Experiments Reference
MIRT017549 hsa-miR-335-5p Microarray 18185580
MIRT1425935 hsa-miR-129-3p CLIP-seq
MIRT1425936 hsa-miR-1908 CLIP-seq
MIRT1425937 hsa-miR-19a CLIP-seq
MIRT1425938 hsa-miR-19b CLIP-seq
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
28
GO ID Ontology Definition Evidence Reference
GO:0000166 Function Nucleotide binding IEA
GO:0004137 Function Deoxycytidine kinase activity IDA 9989599, 11687801
GO:0004137 Function Deoxycytidine kinase activity IEA
GO:0004797 Function Thymidine kinase activity IDA 9989599, 11687801
GO:0004797 Function Thymidine kinase activity IEA
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
188250 11831 ENSG00000166548
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
O00142
Protein name Thymidine kinase 2, mitochondrial (EC 2.7.1.21) (2'-deoxyuridine kinase TK2) (EC 2.7.1.74) (Deoxycytidine kinase TK2) (EC 2.7.1.-) (Mt-TK)
Protein function 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
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF01712 dNK 53 265 Deoxynucleoside kinase Domain
Tissue specificity TISSUE SPECIFICITY: Predominantly expressed in liver, pancreas, muscle, and brain. {ECO:0000269|PubMed:9079672}.
Sequence
Sequence length 265
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Pyrimidine metabolism
Drug metabolism - other enzymes
Metabolic pathways
Nucleotide metabolism
  Pyrimidine salvage
Associated diseases Disease associations from ClinVar categorized as Causal (Pathogenic/Likely Pathogenic) or Unknown.
306
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession
Mitochondrial disease Likely pathogenic; Pathogenic rs1964523180, rs768548319, rs970983506, rs138479499, rs886039669, rs886041321, rs137854429, rs137854430, rs137854431, rs137854432, rs1567533723, rs2507184447, rs1964662122, rs281865500, rs281865486
View all (21 more)
RCV005361660
RCV005361724
RCV005356252
RCV005361816
RCV005355568
RCV005355584
RCV005357118
RCV005357119
RCV005357120
RCV005357121
RCV005356472
RCV005356474
RCV005356524
RCV005357228
RCV005357229
RCV005358312
RCV005356394
RCV005357230
RCV005357231
RCV005357232
RCV005358325
RCV005358334
RCV005358336
RCV005358335
RCV005357235
RCV005357236
RCV005357237
RCV005357238
RCV005357239
RCV005357240
RCV005357241
RCV005357242
RCV005356471
RCV005357243
RCV005357244
RCV005360000
RCV005359998
Mitochondrial DNA depletion syndrome Likely pathogenic; Pathogenic rs2144497920, rs138479499, rs137854429, rs137854431, rs281865499, rs138439950, rs281865487, rs281865507, rs281865493, rs281865492, rs281865494, rs137886900, rs281865501, rs1454450104 RCV002222951
RCV002266060
RCV004526595
RCV003993743
RCV003492321
RCV004782026
RCV006262345
RCV003155045
RCV005055529
RCV005055530
RCV000615451
RCV003230374
RCV002265574
RCV006266665
Mitochondrial DNA depletion syndrome 2, myopathic form Likely pathogenic; Pathogenic rs138439950 RCV004798750
Mitochondrial DNA depletion syndrome, myopathic form Likely pathogenic; Pathogenic rs1964523180, rs768548319, rs973152588, rs2144339570, rs773566302, rs138479499, rs886039669, rs1965024310, rs137854429, rs137854430, rs137854431, rs137854432, rs281865500, rs281865486, rs138439950
View all (10 more)
RCV005005959
RCV003388613
RCV005008381
RCV002246774
RCV002246775
RCV005006210
RCV001089979
RCV003337955
RCV000013545
RCV000013546
RCV000013547
RCV000013548
RCV000032232
RCV002496489
RCV000762978
RCV005007920
RCV005016316
RCV000032247
RCV000762977
RCV000032251
RCV000032253
RCV000032254
RCV000032592
RCV001249200
RCV001249197
Unknown Diseases with uncertain, conflicting, or no pathogenic evidence in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession
Abnormality of the musculature Conflicting classifications of pathogenicity rs770318536 RCV001814354
Clear cell carcinoma of kidney Uncertain significance rs761001323 RCV005932076
Inborn mitochondrial myopathy Conflicting classifications of pathogenicity rs1168827071 RCV002223138
Melanoma Likely benign rs2507165527 RCV005931555
Associations from Text MiningDisease associations identified through Pubtator
Disease Name Relationship Type References
Adenylate Kinase Deficiency Hemolytic Anemia Due To Associate 32904881
Asthma Associate 39217320
Cardiomyopathy Dilated Associate 23695887
HELLP Syndrome Associate 31125140
Hypertrophy Left Ventricular Associate 37715114
Inflammation Associate 24484525
Lung Neoplasms Associate 32638267
Mitochondrial Diseases Associate 12493767, 23468942, 24198295, 32904881
Mitochondrial Diseases Stimulate 26087398
Mitochondrial DNA Depletion Syndrome Myopathic Form Associate 12493767