Gene Gene information from NCBI Gene database.
Entrez ID 7156
Gene name DNA topoisomerase III alpha
Gene symbol TOP3A
Synonyms (NCBI Gene)
MGRISCE2PEOB5TOP3ZGRF7
Chromosome 17
Chromosome location 17p11.2
Summary This gene encodes a DNA topoisomerase, an enzyme that controls and alters the topologic states of DNA during transcription. This enzyme catalyzes the transient breaking and rejoining of a single strand of DNA which allows the strands to pass through one a
SNPs SNP information provided by dbSNP.
6
SNP ID Visualize variation Clinical significance Consequence
rs200944917 G>A,T Pathogenic Synonymous variant, stop gained, coding sequence variant, 5 prime UTR variant, non coding transcript variant
rs376902371 T>C Pathogenic Intron variant, coding sequence variant, 5 prime UTR variant, missense variant, non coding transcript variant, genic upstream transcript variant
rs752838075 G>-,GG Pathogenic Coding sequence variant, frameshift variant, non coding transcript variant
rs1288928564 C>- Pathogenic Coding sequence variant, frameshift variant, non coding transcript variant
rs1555568139 A>- Pathogenic Frameshift variant, non coding transcript variant, coding sequence variant
miRNA miRNA information provided by mirtarbase database.
242
miRTarBase ID miRNA Experiments Reference
MIRT046639 hsa-miR-222-3p CLASH 23622248
MIRT044415 hsa-miR-320a CLASH 23622248
MIRT680154 hsa-miR-5571-5p HITS-CLIP 23824327
MIRT680153 hsa-miR-660-3p HITS-CLIP 23824327
MIRT680152 hsa-miR-4324 HITS-CLIP 23824327
Transcription factors Transcription factors information provided by TRRUST V2 database.
3
Transcription factor Regulation Reference
USF1 Activation 9748294
USF2 Activation 11557042
YY1 Activation 9748294
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
34
GO ID Ontology Definition Evidence Reference
GO:0000724 Process Double-strand break repair via homologous recombination IDA 23543748
GO:0003677 Function DNA binding IEA
GO:0003677 Function DNA binding TAS 8622991
GO:0003697 Function Single-stranded DNA binding IDA 29290614
GO:0003916 Function DNA topoisomerase activity IEA
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
601243 11992 ENSG00000177302
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
Q13472
Protein name DNA topoisomerase 3-alpha (EC 5.6.2.1) (DNA topoisomerase III alpha)
Protein function 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 targ
PDB 4CGY , 4CHT
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF01751 Toprim 36 181 Toprim domain Family
PF01131 Topoisom_bac 195 607 DNA topoisomerase Family
PF01396 zf-C4_Topoisom 655 694 Topoisomerase DNA binding C4 zinc finger Family
PF06839 zf-GRF 811 852 GRF zinc finger Domain
PF06839 zf-GRF 895 939 GRF zinc finger Domain
Tissue specificity TISSUE SPECIFICITY: High expression is found in testis, heart, skeletal muscle and pancreas.
Sequence
MIFPVARYALRWLRRPEDRAFSRAAMEMALRGVRKVLCVAEKNDAAKGIADLLSNGRMRR
REGLSKFNKIYEFDYHLYGQNVTMVMTSVSGHLLAHDFQMQFRKWQSCNPLVLFEAEIEK
YCPENFVDIKKTLERETRQCQALVIWTDCDREGENIGFEIIHVCKAVKPNLQVLRARFSE
I
TPHAVRTACENLTEPDQRVSDAVDVRQELDLRIGAAFTRFQTLRLQRIFPEVLAEQLIS
YGSCQFPTLGFVVERFKAIQAFVPEIFHRIKVTHDHKDGIVEFNWKRHRLFNHTACLVLY
QLCVEDPMATVVEVRSKPKSKWRPQALDTVELEKLASRKLRINAKETMRIAEKLYTQGYI
SYPRTETNIFPRDLNLTVLVEQQTPDPRWGAFAQSILERGGPTPRNGNKSDQAHPPIHPT
KYTNNLQGDEQRLYEFIVRHFLACCSQDAQGQETTVEIDIAQERFVAHGLMILARNYLDV
YPYDHWSDKILPVYEQGSHFQPSTVEMVDGETSPPKLLTEADLIALMEKHGIGTDATHAE
HIETIKARMYVGLTPDKRFLPGHLGMGLVEGYDSMGYEMSKPDLRAELEADLKLICDGKK
DKFVVLR
QQVQKYKQVFIEAVAKAKKLDEALAQYFGNGTELAQQEDIYPAMPEPIRKCPQ
CNKDMVLKTKKNGGFYLSCMGFPECRSAVWLPDS
VLEASRDSSVCPVCQPHPVYRLKLKF
KRGSLPPTMPLEFVCCIGGCDDTLREILDLRFSGGPPRASQPSGRLQANQSLNRMDNSQH
PQPADSRQTGSSKALAQTLPPPTAAGESNSVTCNCGQEAVLLTVRKEGPNRGRQFFKCNG
GSCNFFLWADSP
NPGAGGPPALAYRPLGASLGCPPGPGIHLGGFGNPGDGSGSGTSCLCS
QPSVTRTVQKDGPNKGRQFHTCAKPREQQCGFFQWVDEN
TAPGTSGAPSWTGDRGRTLES
EARSKRPRASSSDMGSTAKKPRKCSLCHQPGHTRPFCPQNR
Sequence length 1001
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Homologous recombination
Fanconi anemia pathway
  HDR through Single Strand Annealing (SSA)
HDR through Homologous Recombination (HRR)
Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA)
Resolution of D-loop Structures through Holliday Junction Intermediates
Homologous DNA Pairing and Strand Exchange
Processing of DNA double-strand break ends
Presynaptic phase of homologous DNA pairing and strand exchange
Regulation of TP53 Activity through Phosphorylation
G2/M DNA damage checkpoint
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
22
Evidence Score: ★☆☆☆☆  Gene-disease association found in Text Mining only ★★☆☆☆  Found in Text Mining and Unknown/Other Associations ★★★☆☆  Reported in Unknown/Other Associations across ≥2 Sources ★★★★☆  ClinVar: Pathogenic/Likely Pathogenic (<5 Variants) ★★★★★  ClinVar: Pathogenic/Likely Pathogenic (≥5 Variants)
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession Evidence Score
Microcephaly, growth restriction, and increased sister chromatid exchange 2 Likely pathogenic; Pathogenic rs200150335, rs1288928564, rs752838075, rs1555568139 RCV004594678
RCV000678245
RCV000678246
RCV000678247
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Mitochondrial disease Pathogenic rs200944917, rs376902371 RCV000627803
RCV000627802
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal recessive 5 Pathogenic; Likely pathogenic rs1181170417, rs200944917, rs376902371, rs1597981046 RCV003890773
RCV000678503
RCV000678502
RCV000787954
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Unknown / Other Associations ClinVar entries with uncertain/conflicting evidence, and associations from other databases (OMIM, Orphanet, GWAS, etc.) where the gene is not established as causal.
Phenotype Name Clinical Significance Source Evidence Score
AUTOSOMAL RECESSIVE PROGRESSIVE EXTERNAL OPHTHALMOPLEGIA Orphanet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Cervical cancer Benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Cholangiocarcinoma Benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Clear cell carcinoma of kidney Uncertain significance; Benign ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Associations from Text Mining Disease associations identified through text mining
Disease Name Disease (Merged) Source PMID Relationship Type Evidence Score
Adenocarcinoma of lung (disorder) Lung adenocarcinoma BEFREE 28355294
★☆☆☆☆
Found in Text Mining only
Alternating hemiplegia of childhood Alternating hemiplegia of childhood Pubtator 28877996, 31138797 Associate
★☆☆☆☆
Found in Text Mining only
Astrocytoma Astrocytoma BEFREE 22102081
★☆☆☆☆
Found in Text Mining only
Bladder Neoplasm Bladder Neoplasm BEFREE 19432957
★☆☆☆☆
Found in Text Mining only
Blepharoptosis Ptosis HPO_DG
★☆☆☆☆
Found in Text Mining only
Bloom Syndrome Bloom Syndrome BEFREE 30057030
★☆☆☆☆
Found in Text Mining only
Bloom Syndrome Bloom syndrome Pubtator 33631320, 35119917, 37013609 Associate
★☆☆☆☆
Found in Text Mining only
Breast Carcinoma Breast Carcinoma BEFREE 19432957
★☆☆☆☆
Found in Text Mining only
Breast Neoplasms Breast neoplasm Pubtator 19432957 Associate
★☆☆☆☆
Found in Text Mining only
Carcinoma of bladder Bladder carcinoma BEFREE 19432957
★☆☆☆☆
Found in Text Mining only