======= TK2 =======


== Gene Information ==
  * **<color #00a2e8>Official Symbol</color>**: TK2
  * **<color #00a2e8>Official Name</color>**: thymidine kinase 2
  * **<color #00a2e8>Aliases and Previous Symbols</color>**: N/A
  * **<color #00a2e8>Entrez ID</color>**: [[https://www.ncbi.nlm.nih.gov/gene/?term=7084|7084]]
  * **<color #00a2e8>UniProt</color>**: [[https://www.uniprot.org/uniprot/O00142|O00142]]
  * **<color #00a2e8>Interactions</color>**: [[https://thebiogrid.org/search.php?search=TK2&organism=9606|BioGRID]]
  * **<color #00a2e8>PubMed articles</color>**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20TK2|Open PubMed]]
  * **<color #00a2e8>OMIM</color>**: [[https://omim.org/entry/188250|Open OMIM]]

== Function Summary ==
  * **<color #00a2e8>Entrez Summary</color>**:  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 associated with a myopathic form of mitochondrial DNA depletion syndrome. Alternate splicing results in multiple transcript variants encoding distinct isoforms, some of which lack transit peptide, so are not localized to mitochondria. [provided by RefSeq, Dec 2012]. 
  * **<color #00a2e8>UniProt Summary</color>**:  Phosphorylates thymidine, deoxycytidine, and deoxyuridine in the mitochondrial matrix. In non-replicating cells, where cytosolic dNTP synthesis is down-regulated, mtDNA synthesis depends solely on TK2 and DGUOK. Widely used as target of antiviral and chemotherapeutic agents. {ECO:0000269|PubMed:11687801}.

<button type='primary' size='sm' modal='Pfam_Domains'>Pfam Domains</button>
<button type='primary' size='sm' modal='GO_terms'>GO Terms</button>


<modal id='Pfam_Domains' size='lg' title='Pfam Domains'>
|dNK|
</modal>

<modal id='GO_terms' size='lg' title='GO Terms'>
|deoxycytidine metabolic process|
|nucleoside kinase activity|
|thymidine kinase activity|
|deoxycytidine kinase activity|
|deoxynucleoside kinase activity|
|thymidine metabolic process|
|pyrimidine deoxyribonucleoside metabolic process|
|deoxyribonucleoside metabolic process|
|deoxyribonucleoside monophosphate biosynthetic process|
|pyrimidine-containing compound salvage|
|pyrimidine nucleoside salvage|
|deoxyribonucleoside monophosphate metabolic process|
|pyrimidine nucleoside biosynthetic process|
|nucleoside salvage|
|cellular metabolic compound salvage|
|pyrimidine nucleoside metabolic process|
|nucleoside biosynthetic process|
|glycosyl compound biosynthetic process|
|nucleoside monophosphate biosynthetic process|
|pyrimidine-containing compound biosynthetic process|
|nucleoside monophosphate metabolic process|
|nucleobase-containing small molecule biosynthetic process|
|pyrimidine-containing compound metabolic process|
|nucleoside metabolic process|
|DNA biosynthetic process|
|glycosyl compound metabolic process|
|nucleotide biosynthetic process|
|nucleoside phosphate biosynthetic process|
|mitochondrial matrix|
|nucleotide metabolic process|
|nucleoside phosphate metabolic process|
|organophosphate biosynthetic process|
|nucleobase-containing small molecule metabolic process|
|small molecule biosynthetic process|
|carbohydrate derivative biosynthetic process|
|DNA metabolic process|
|organophosphate metabolic process|
|carbohydrate derivative metabolic process|
|nucleobase-containing compound biosynthetic process|
|heterocycle biosynthetic process|
|aromatic compound biosynthetic process|
|mitochondrion|
|phosphorylation|
|organic cyclic compound biosynthetic process|
|organonitrogen compound biosynthetic process|
|ATP binding|
|cellular nitrogen compound biosynthetic process|
|cellular macromolecule biosynthetic process|
|small molecule metabolic process|
|macromolecule biosynthetic process|
</modal>
\\

 === CRISPR Data ===
<button type='primary' size='small' modal='Compound_Hit'>Compound Hit</button>
<button type='default' size='small' modal='Most_Correlated_Genes'>Most Correlated Genes in Chemogenomics</button>
<button type='primary' size='small' modal='Essential_Avana'>Tissues where Essential in the Avana Dataset (DepMap 20Q1)</button>

<modal id='Compound_Hit' size='lg' title='Compound Hit'>
^Screen^Score^
|[[:results:exp68|Clomiphene 4.4μM R02 exp68]]|-1.99|
|[[:results:exp71|KU-0063794 3.8μM R02 exp71]]|-1.73|
</modal>

<modal id='Most_Correlated_Genes' size='lg' title='Most Correlated Genes in Chemogenomics'>
No correlation found to any other genes in chemogenomics.
</modal>

<modal id='Essential_Avana' size='lg' title='Tissues where Essential in the Avana Dataset (DepMap 20Q1)'>
Global Fraction of Cell Lines Where Essential: 0/739
^Tissue^Fraction Of Cell Lines Where Essential^
|1290807.0|0/1|
|909776.0|0/1|
|bile duct|0/28|
|blood|0/28|
|bone|0/26|
|breast|0/33|
|central nervous system|0/56|
|cervix|0/4|
|colorectal|0/17|
|esophagus|0/13|
|fibroblast|0/1|
|gastric|0/16|
|kidney|0/21|
|liver|0/20|
|lung|0/75|
|lymphocyte|0/16|
|ovary|0/26|
|pancreas|0/24|
|peripheral nervous system|0/16|
|plasma cell|0/15|
|prostate|0/1|
|skin|0/24|
|soft tissue|0/9|
|thyroid|0/2|
|upper aerodigestive|0/22|
|urinary tract|0/29|
|uterus|0/5|
</modal>

== Essentiality in NALM6  ==
    * **<color #00a2e8>Essentiality Rank</color>**: 7533
    * **<color #00a2e8>Expression level (log2 read counts)</color>**: 2.74 
<button type='primary' size='small' modal='Dist_expr'>Expression Distribution</button>
<modal id='Dist_expr' size='lg' title='TK2 Expression in NALM6 Cells: 2.74'>
{{:chemogenomics:nalm6 dist.png?nolink |}}
</modal>