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Entry version 51 (13 Nov 2019)
Sequence version 1 (22 Feb 2012)
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Protein

DNA topoisomerase

Gene

TOP3B

Organism
Cavia porcellus (Guinea pig)
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>OrganismiCavia porcellus (Guinea pig)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 identifieri10141 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaHystricomorphaCaviidaeCavia
<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
  • UP000005447 <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: Unassembled WGS sequence

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSCPOG00000001812 Expressed in 3 organ(s), highest expression level in adult mammalian kidney

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
10141.ENSCPOP00000001640

<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>Domaini3 – 153ToprimInterPro annotationAdd BLAST151

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>Regioni377 – 397DisorderedSequence analysisAdd BLAST21
Regioni821 – 854DisorderedSequence 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 biasi826 – 844BasicSequence 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

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG1956 Eukaryota
COG0550 LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000156516

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
H0UX40

Identification of Orthologs from Complete Genome Data

More...
OMAi
TYPRVDT

Database of Orthologous Groups

More...
OrthoDBi
373433at2759

TreeFam database of animal gene trees

More...
TreeFami
TF105288

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00186 TOP1Ac, 1 hit
cd03362 TOPRIM_TopoIA_TopoIII, 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
IPR006171 TOPRIM_domain
IPR034144 TOPRIM_TopoIII

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
PF01751 Toprim, 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
SM00493 TOPRIM, 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
PS50880 TOPRIM, 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>Sequencei

<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.

H0UX40-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MKTVFMVAEK PSLAQSIAKI LSRGGMSSHK GLNGACSVHE YMGTFAGQPV
60 70 80 90 100
RFKMTSVCGH VMTLDFLGKY NKWDKVDPAE LFSQAPTEKK EANPKLNMVK
110 120 130 140 150
FLQVEGRGCD YIVLWLDCDK EGENICFEVL DAVLPVMNKT HNGEKTVFRA
160 170 180 190 200
RFSSITDTDI CNAMACLGEP DHNEALSVDA RQELDLRIGC AFTRFQTKYF
210 220 230 240 250
QGKYGDLDSS LISFGPCQTP TLGFCVERHD KIQSFKPETY WVLQAKVNVE
260 270 280 290 300
KDKSLLLDWD RVRVFDREIA QMFLNMTKLE KEAQVEATSR KEKAKQRPLA
310 320 330 340 350
LNTVEMLRVA SSALGMGPQH AMQTAERLYT QGYISYPRTE TTHYPENFDL
360 370 380 390 400
KGCLRQQANH PYWADTVKQL LTEGINRPRK GHDAGDHPPI TPMRSATEDE
410 420 430 440 450
LGGDAWRLYE YITRHFIATV SHDCKYLQST ISFRIGPELF TCSGKTVISP
460 470 480 490 500
GFTEIMPWQS VPLEESLPTC QRGDTFAVGE VKMLEKQTSP PDYLTEAELI
510 520 530 540 550
TLMEKHGIGT DASIPVHINN ICQRNYVSVE SGRRLKPTNL GIVLVHGYYK
560 570 580 590 600
IDAELVLPTI RSAVEKQLNL IAQGKADYRQ VLGHTLDIFK RKFHYFVDSI
610 620 630 640 650
AGMDELMEVS FSPLAATGKP LSRCGKCHRF MKYIQAKPSR LHCSHCDETY
660 670 680 690 700
TLPQNGTIKL YKELRCPLDD FELVLWSSGS RGKSYPLCPY CYNHPPFRDM
710 720 730 740 750
KKGMGCNECT HPTCQHSLSM LGIGQCVECE SGILVLDPTS GPKWKVACNK
760 770 780 790 800
CNVVAHCFEN AHRVRVSADT CNTCEAALLD VDFNKAKSPL PGDETQHTGC
810 820 830 840 850
VFCDPVFQEL VELKHAASCH PMHRGGPGRR QGRGRARGRR PPGKPNPRRP
860
KDKMSALAAY FV
Length:862
Mass (Da):96,877
Last modified:February 22, 2012 - 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:iBC5E0F9D8BC4BF0A
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AAKN02007374 Genomic DNA No translation available.

NCBI Reference Sequences

More...
RefSeqi
XP_003478449.1, XM_003478401.3
XP_005007385.1, XM_005007328.2
XP_012997535.1, XM_013142081.1

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSCPOT00000001833; ENSCPOP00000001640; ENSCPOG00000001812

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
100734860

<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

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AAKN02007374 Genomic DNA No translation available.
RefSeqiXP_003478449.1, XM_003478401.3
XP_005007385.1, XM_005007328.2
XP_012997535.1, XM_013142081.1

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...

Protein-protein interaction databases

STRINGi10141.ENSCPOP00000001640

Genome annotation databases

EnsembliENSCPOT00000001833; ENSCPOP00000001640; ENSCPOG00000001812
GeneIDi100734860

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
8940

Phylogenomic databases

eggNOGiKOG1956 Eukaryota
COG0550 LUCA
GeneTreeiENSGT00940000156516
InParanoidiH0UX40
OMAiTYPRVDT
OrthoDBi373433at2759
TreeFamiTF105288

Gene expression databases

BgeeiENSCPOG00000001812 Expressed in 3 organ(s), highest expression level in adult mammalian kidney

Family and domain databases

CDDicd00186 TOP1Ac, 1 hit
cd03362 TOPRIM_TopoIA_TopoIII, 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
IPR006171 TOPRIM_domain
IPR034144 TOPRIM_TopoIII
PANTHERiPTHR11390 PTHR11390, 1 hit
PfamiView protein in Pfam
PF01131 Topoisom_bac, 1 hit
PF01751 Toprim, 1 hit
PRINTSiPR00417 PRTPISMRASEI
SMARTiView protein in SMART
SM00437 TOP1Ac, 1 hit
SM00436 TOP1Bc, 1 hit
SM00493 TOPRIM, 1 hit
SUPFAMiSSF56712 SSF56712, 1 hit
PROSITEiView protein in PROSITE
PS00396 TOPOISOMERASE_I_PROK, 1 hit
PS50880 TOPRIM, 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 nameiH0UX40_CAVPO
<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: H0UX40
<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: February 22, 2012
Last sequence update: February 22, 2012
Last modified: November 13, 2019
This is version 51 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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