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E9F0C3 · E9F0C3_METRA

Function

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 the specific target site 5'-[CT]CCTTp site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(3'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 5'-OH DNA strand. The free DNA strand then undergoes passage around the unbroken strand thus removing DNA supercoils. Finally, in the religation step, the DNA 5'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone.

Caution

The sequence shown here is derived from an EMBL/GenBank/DDBJ whole genome shotgun (WGS) entry which is preliminary data.

Catalytic activity

  • ATP-independent breakage of single-stranded DNA, followed by passage and rejoining.
    EC:5.6.2.1 (UniProtKB | ENZYME | Rhea)

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentchromosome
Cellular Componentnucleolus
Molecular FunctionDNA binding
Molecular FunctionDNA topoisomerase type I (single strand cut, ATP-independent) activity
Biological Processchromosome segregation
Biological ProcessDNA replication
Biological ProcessDNA topological change

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    DNA topoisomerase I
  • EC number
  • Alternative names
    • DNA topoisomerase 1

Gene names

    • ORF names
      MAA_05722

Organism names

Accessions

  • Primary accession
    E9F0C3

Proteomes

Subcellular Location

Family & Domains

Features

Showing features for region, compositional bias, domain, coiled coil.

Type
IDPosition(s)Description
Region1-258Disordered
Compositional bias74-125Basic and acidic residues
Compositional bias132-181Basic and acidic residues
Compositional bias196-215Basic and acidic residues
Compositional bias231-258Basic and acidic residues
Domain422-877DNA topoisomerase I eukaryotic-type
Coiled coil824-851

Sequence similarities

Belongs to the type IB topoisomerase family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    907
  • Mass (Da)
    103,103
  • Last updated
    2011-04-05 v1
  • MD5 Checksum
    BAC0387235BEEEFC1950B0C49979260F
MSSDSSDDDRPLARPNGHLSSAKVSRAEDEALDRSQPRKSSGMAGIVVRNGPVDDAMDLDAPNGVNKRKSRSSISKVSYRDESDSDGEPLAKRPRPSARPVDSDSDDEPISKVKAKKKSTSMLADSSDDEKPLGVQLAKKKAAIEKKAAREAQTIRSKETAKSTPKKNIKEESDDEPLAKSSANKRQSNGASAKRKSNGVKKEESDSDAPISKKTKAKGKTTASSKGKSTASTKDSKKAKVKETSEDEEGYEWWNAPKPEDDSIKWQTLEHNGVLFAPEYEPLPKNVKLLYDGKPVTLSKEAEEVATFWVAMMTPASSHHLDNPVFRNNFFTDFSEIVKKNGGATDREGNKVQIKSLDKCDFSKIYDHWLAKTEANKTKNLSKEEKEAAKAKKDALEAPYLYCIWDGRKQKVGNFRVEPPSLFRGRGEHPKTGRVKTRVFPEQITINIGKDAKIPEPPAGHKWKAVQHDQKATWLAMWQENINGAYKYVMLGAASDVKGQSDYKKFEKARELKKYIDKIRKDYTRELKSEVMADRQRATAMYLIDQLALRAGNEKDTENEADTVGCCSLKYEHITLEPPNKVTFDFLGKDSIRYNETALVEPQVFKNLKLFKKAPKSDGDDLFDRLTTSQLNKHLNSYMTGLTAKVFRTYNASYTMSTLLKELSQDPRSKGSIAEKVKLYNDCNRKVAILCNHKRTVGAGHEQQMQKMGDRIKGLRYQKWRTKKMILDLEPSYKKKKGASWFELDEDLDQEWIQEHQQFLIEEQRTKITKKFEKDNEKRKANKEKPMPEKELKERLQVVKDLETKFRKENKIGKVEAEGRGASVDKYLKAIEKLDERVKVLETQAEDRDGNKEVALGTSKINYIDPRLTVVFAKKFDVPIEKFFSKTLRDKFRWAIKSVEDTEDWEF

Features

Showing features for compositional bias.

TypeIDPosition(s)Description
Compositional bias74-125Basic and acidic residues
Compositional bias132-181Basic and acidic residues
Compositional bias196-215Basic and acidic residues
Compositional bias231-258Basic and acidic residues

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
ADNJ02000002
EMBL· GenBank· DDBJ
EFY98583.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
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