======= TOP3B =======


== Gene Information ==
  * **<color #00a2e8>Official Symbol</color>**: TOP3B
  * **<color #00a2e8>Official Name</color>**: DNA topoisomerase III beta
  * **<color #00a2e8>Aliases and Previous Symbols</color>**: N/A
  * **<color #00a2e8>Entrez ID</color>**: [[https://www.ncbi.nlm.nih.gov/gene/?term=8940|8940]]
  * **<color #00a2e8>UniProt</color>**: [[https://www.uniprot.org/uniprot/O95985|O95985]]
  * **<color #00a2e8>Interactions</color>**: [[https://thebiogrid.org/search.php?search=TOP3B&organism=9606|BioGRID]]
  * **<color #00a2e8>PubMed articles</color>**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20TOP3B|Open PubMed]]
  * **<color #00a2e8>OMIM</color>**: [[https://omim.org/entry/603582|Open OMIM]]

== Function Summary ==
  * **<color #00a2e8>Entrez Summary</color>**: N/A
  * **<color #00a2e8>UniProt Summary</color>**:  Releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand than undergoes passage around the unbroken strand thus removing DNA supercoils. Finally, in the religation step, the DNA 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone (By similarity). Possesses negatively supercoiled DNA relaxing activity. {ECO:0000250}.

<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'>
|Topoisom bac|
|Toprim|
</modal>

<modal id='GO_terms' size='lg' title='GO Terms'>
|DNA topoisomerase activity|
|DNA topoisomerase type I activity|
|DNA topological change|
|condensed chromosome|
|chromosome segregation|
|DNA conformation change|
|DNA metabolic process|
|chromosome organization|
|RNA binding|
|DNA binding|
</modal>
\\

 === CRISPR Data ===
<button type='default' 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'>
No hits were found.
</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>**: 5460
    * **<color #00a2e8>Expression level (log2 read counts)</color>**: 6.04 
<button type='primary' size='small' modal='Dist_expr'>Expression Distribution</button>
<modal id='Dist_expr' size='lg' title='TOP3B Expression in NALM6 Cells: 6.04'>
{{:chemogenomics:nalm6 dist.png?nolink |}}
</modal>