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Entry version 14 (13 Nov 2019)
Sequence version 1 (28 Mar 2018)
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Protein

DNA topoisomerase

Gene

TOP3B

Organism
Aotus nancymaae (Ma's night monkey)
Status
Unreviewed-Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Introduces a single-strand break via transesterification at a target site in duplex DNA. 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. 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.UniRule annotation

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

  • ATP-independent breakage of single-stranded DNA, followed by passage and rejoining.UniRule annotation EC:5.6.2.1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionDNA-bindingUniRule annotation, Isomerase, TopoisomeraseUniRule annotation

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
DNA topoisomeraseUniRule annotation (EC:5.6.2.1UniRule annotation)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:TOP3BImported
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiAotus nancymaae (Ma's night monkey)Imported
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri37293 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniPlatyrrhiniAotidaeAotus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000233020 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Whole Genome Shotgun Assembly

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini10 – 106TOP1BcInterPro annotationAdd BLAST97
Domaini153 – 409TOP1AcInterPro annotationAdd BLAST257

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni685 – 718DisorderedSequence analysisAdd BLAST34

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi690 – 708BasicSequence analysisAdd BLAST19

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the type IA topoisomerase family.UniRule annotation

Phylogenomic databases

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000156516

Database of Orthologous Groups

More...
OrthoDBi
373433at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00186 TOP1Ac, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.290.10, 1 hit
1.10.460.10, 1 hit
2.70.20.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000380 Topo_IA
IPR003601 Topo_IA_2
IPR023406 Topo_IA_AS
IPR013497 Topo_IA_cen
IPR013824 Topo_IA_cen_sub1
IPR013825 Topo_IA_cen_sub2
IPR013826 Topo_IA_cen_sub3
IPR023405 Topo_IA_core_domain
IPR003602 Topo_IA_DNA-bd_dom

The PANTHER Classification System

More...
PANTHERi
PTHR11390 PTHR11390, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01131 Topoisom_bac, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00417 PRTPISMRASEI

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00437 TOP1Ac, 1 hit
SM00436 TOP1Bc, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF56712 SSF56712, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00396 TOPOISOMERASE_I_PROK, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All

A0A2K5E7S3-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MNKAHGSEKT VFRAKFSSIT DTDICNAMAC LGEPDHNEAL SVDARQELDL
60 70 80 90 100
RIGCAFTRFQ TKYFQGKYGD LDSSLISFGP CQTPTLGFCV ERHDKIQSFK
110 120 130 140 150
PETYWVLQAK VNTDKDRSLL LDWDRVRVFD REIAQMFLNM TKLEKEAQVE
160 170 180 190 200
ATSRKEKAKQ RPLALNTVEM LRVASSSLGM GPQHAMQTAE RLYTQGYISY
210 220 230 240 250
PRTETTHYPE NFDLKGALRQ QANHPYWADM VKQLLAEGIN RPRKGHDAGD
260 270 280 290 300
HPPITPMRSA TEAELGGDAW RLYEYITRHF IATVSHDCKY LQSTISFRIG
310 320 330 340 350
PELFTCSGKT VLSPGFTEIM PWQSVPLEES LPTCQRGDTF TVSEVKMLEK
360 370 380 390 400
QTSPPDYLTE AELITLMEKH GIGTDASIPV HINNICQRNY VTVESGRRLK
410 420 430 440 450
PTNLGIVLVH GYYKIDAELV LPTIRSAVEK QLNLIAQGKA DYRQVLGHTL
460 470 480 490 500
DVFKRKFHYF VDSIAGMDEL MEVSFSPLAA TGKPLSRCGK CHRFMKYIQA
510 520 530 540 550
KPSRLHCSHC DETYTLPQNG TIKLYKELRC PLDDFELVLW SSGSRGKSYP
560 570 580 590 600
LCPYCYNHPP FRDMKKGMGC NECTHPSCQH SLSMLGIGQC VECENGVLVL
610 620 630 640 650
DPTSGPKWKV ACNKCNVVAH CFENAHRVRV SADTCSVCEA ALLDVDFNKA
660 670 680 690 700
KSPLPGDETQ HMGCVFCDPV FQELVELKHA ASCHPMHRGG PGRRQGRGRG
710 720
RARRPPGKPN PRRPKDKMSA LAAYFV
Length:726
Mass (Da):81,734
Last modified:March 28, 2018 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i00D1366FA462B175
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
A0A2K5E7V3A0A2K5E7V3_AOTNA
DNA topoisomerase
TOP3B
862Annotation score:

Annotation score:2 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Sequence databases

NCBI Reference Sequences

More...
RefSeqi
XP_012321903.1, XM_012466480.1

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSANAT00000047323; ENSANAP00000029295; ENSANAG00000032388

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
105726900

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

RefSeqiXP_012321903.1, XM_012466480.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Genome annotation databases

EnsembliENSANAT00000047323; ENSANAP00000029295; ENSANAG00000032388
GeneIDi105726900

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
8940

Phylogenomic databases

GeneTreeiENSGT00940000156516
OrthoDBi373433at2759

Family and domain databases

CDDicd00186 TOP1Ac, 1 hit
Gene3Di1.10.290.10, 1 hit
1.10.460.10, 1 hit
2.70.20.10, 1 hit
InterProiView protein in InterPro
IPR000380 Topo_IA
IPR003601 Topo_IA_2
IPR023406 Topo_IA_AS
IPR013497 Topo_IA_cen
IPR013824 Topo_IA_cen_sub1
IPR013825 Topo_IA_cen_sub2
IPR013826 Topo_IA_cen_sub3
IPR023405 Topo_IA_core_domain
IPR003602 Topo_IA_DNA-bd_dom
PANTHERiPTHR11390 PTHR11390, 1 hit
PfamiView protein in Pfam
PF01131 Topoisom_bac, 1 hit
PRINTSiPR00417 PRTPISMRASEI
SMARTiView protein in SMART
SM00437 TOP1Ac, 1 hit
SM00436 TOP1Bc, 1 hit
SUPFAMiSSF56712 SSF56712, 1 hit
PROSITEiView protein in PROSITE
PS00396 TOPOISOMERASE_I_PROK, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiA0A2K5E7S3_AOTNA
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: A0A2K5E7S3
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/TrEMBL: March 28, 2018
Last sequence update: March 28, 2018
Last modified: November 13, 2019
This is version 14 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiUnreviewed (UniProtKB/TrEMBL)

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteomeImported
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