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Entry version 87 (16 Jan 2019)
Sequence version 1 (22 Jul 2008)
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Protein

DNA topoisomerase 2

Gene

TOPII

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Unreviewed-Annotation score:

Annotation score:3 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

Control of topological states of DNA by transient breakage and subsequent rejoining of DNA strands. Topoisomerase II makes double-strand breaks.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-dependent breakage, passage and rejoining of double-stranded DNA.UniRule annotation EC:5.99.1.3

<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
LigandATP-bindingUniRule annotation, Nucleotide-binding

<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 topoisomerase 2UniRule annotation (EC:5.99.1.3UniRule 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:TOPIIImported
Synonyms:ATTOPIIImported, TOPOISOMERASE IIImported, topoisomerase IIImported
Ordered Locus Names:At3g23890Imported
<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>OrganismiArabidopsis thaliana (Mouse-ear cress)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 identifieri3702 [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 lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
<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
  • UP000006548 <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: Chromosome 3

Organism-specific databases

Arabidopsis Information Portal

More...
Araporti
AT3G23890

<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

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
B3H4G2 baseline and differential

<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

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer.UniRule annotation

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

Protein Model Portal of the PSI-Nature Structural Biology Knowledgebase

More...
ProteinModelPortali
B3H4G2

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
B3H4G2

Database of comparative protein structure models

More...
ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<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>Domaini455 – 569ToprimInterPro annotationAdd BLAST115

Coiled coil

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and domains’ section denotes the positions of regions of coiled coil within the protein.<p><a href='/help/coiled' target='_top'>More...</a></p>Coiled coili1021 – 1041Sequence analysisAdd BLAST21
Coiled coili1163 – 1190Sequence analysisAdd BLAST28

<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 II topoisomerase family.UniRule annotation

Keywords - Domaini

Coiled coilSequence analysis

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0355 Eukaryota
COG0187 LUCA
COG0188 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000216693

Identification of Orthologs from Complete Genome Data

More...
OMAi
DCASARY

Database of Orthologous Groups

More...
OrthoDBi
117851at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00075 HATPase_c, 1 hit
cd00187 TOP4c, 1 hit
cd03365 TOPRIM_TopoIIA, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.268.10, 1 hit
3.30.230.10, 1 hit
3.30.565.10, 1 hit
3.40.50.670, 1 hit
3.90.199.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR003594 HATPase_C
IPR036890 HATPase_C_sf
IPR020568 Ribosomal_S5_D2-typ_fold
IPR014721 Ribosomal_S5_D2-typ_fold_subgr
IPR001241 Topo_IIA
IPR013760 Topo_IIA-like_dom_sf
IPR002205 Topo_IIA_A/C
IPR013758 Topo_IIA_A/C_ab
IPR013757 Topo_IIA_A_a_sf
IPR013759 Topo_IIA_B_C
IPR013506 Topo_IIA_bsu_dom2
IPR018522 TopoIIA_CS
IPR031660 TOPRIM_C
IPR006171 TOPRIM_domain
IPR034157 TOPRIM_TopoII

The PANTHER Classification System

More...
PANTHERi
PTHR10169 PTHR10169, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00204 DNA_gyraseB, 1 hit
PF00521 DNA_topoisoIV, 1 hit
PF02518 HATPase_c, 1 hit
PF01751 Toprim, 1 hit
PF16898 TOPRIM_C, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00387 HATPase_c, 1 hit
SM00433 TOP2c, 1 hit
SM00434 TOP4c, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF54211 SSF54211, 1 hit
SSF55874 SSF55874, 1 hit
SSF56719 SSF56719, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00177 TOPOISOMERASE_II, 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>.<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

B3H4G2-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MATKLPLQNS NAANVAKAPA KSRAAAGGKT IEEMYQKKSQ LEHILLRPDT
60 70 80 90 100
YIGSIEKHTQ TLWVYEKDEM VQRPVTYVPG LYKIFDEILV NAADNKQRDA
110 120 130 140 150
KMDSVQVVID VEQNLISVCN SGAGVPVEIH QEEGIYVPEM IFGHLLTSSN
160 170 180 190 200
YDDNVKKTTG GRNGYGAKLT NIFSTEFIIE TADGKRLKKY KQVFENNMGK
210 220 230 240 250
KSEPVITKCN KSENWTKVTF KPDLKKFNMT ELEDDVVALM SKRVFDIAGC
260 270 280 290 300
LGKSVKVELN GKQIPVKSFT DYVDLYLSAA NKSRTEDPLP RLTEKVNDRW
310 320 330 340 350
EVCVSLSEGQ FQQVSFVNSI ATIKGGTHVD YVTSQITNHI VAAVNKKNKN
360 370 380 390 400
ANVKAHNVKN HLWVFVNALI DNPAFDSQTK ETLTLRQSSF GSKCELSEDF
410 420 430 440 450
LKKVGKSGVV ENLLSWADFK QNKDLKKSDG AKTGRVLVEK LDDAAEAGGK
460 470 480 490 500
NSRLCTLILT EGDSAKSLAL AGRSVLGNNY CGVFPLRGKL LNVREASTTQ
510 520 530 540 550
ITNNKEIENL KKILGLKQNM KYENVNSLRY GQMMIMTDQD HDGSHIKGLL
560 570 580 590 600
INFIHSFWPS LLQVPSFLVE FITPIVKATR KGTKKVLSFY SMPEYEEWKE
610 620 630 640 650
SLKGNATGWD IKYYKGLGTS TAEEGKEYFS NLGLHKKDFV WEDEQDGEAI
660 670 680 690 700
ELAFSKKKIE ARKNWLSSYV PGNHLDQRQP KVTYSDFVNK ELILFSMADL
710 720 730 740 750
QRSIPSMVDG LKPGQRKILF VAFKKIARKE MKVAQLVGYV SLLSAYHHGE
760 770 780 790 800
QSLASAIIGM AQDYVGSNNI NLLLPNGQFG TRTSGGKDSA SARYIFTKLS
810 820 830 840 850
PVTRILFPKD DDLLLDYLNE DGQRIEPTWY MPIIPTVLVN GAEGIGTGWS
860 870 880 890 900
TFIPNYNPRE IVANVRRLLN GESMVPMDPW YRGFKGTIEK TASKEGGCTY
910 920 930 940 950
TITGLYEEVD ETTIRITELP IRRWNDDYKN FLQSLKTDNG APFFQDVKAY
960 970 980 990 1000
NDEKSVDFDL ILSEENMLAA RQEGFLKKFK LTTTIATSNM HLFDKKGVIK
1010 1020 1030 1040 1050
KYVTPEQILE EFFDLRFEYY EKRKETVVKN MEIELLKLEN KARFILAVLS
1060 1070 1080 1090 1100
GEIIVNKRKK ADIVEDLRQK GFTPFPRKAE SVEAAIAGAV DDDAAEEPEE
1110 1120 1130 1140 1150
ILVDPESSSS YIPGSEYDYL LAMAIASLTI EKVEELLADR DKMIIAVADM
1160 1170 1180 1190 1200
KKTTPKSLWL SDLESLDKEL EKLDLKDAQV QQAIEAAQKK IRAKSGAAVK
1210 1220 1230 1240 1250
VKRQAPKKPA PKKTTKKASE SETTEASYSA MDTDNNVAEV VKPKGRQGAK
1260 1270 1280 1290 1300
KKAPAAAKEV EEDEMLDLAQ RLAQYNFGSA PADSSKTAET SKAIAVDDDD
1310 1320 1330 1340 1350
DDVVVEVAPV KKGGRKPAAT KAAKPPAAPR KRGKQTVAST EVLAIGVSPE
1360 1370 1380 1390 1400
KKVRKMRSSP FNKKSSSVMS RLADNKEEES SENVAGNSSS EKSGGDVSAI
1410 1420 1430
SRPQRANRRK MTYVLSDSES ESANDSEFDD IEDDEDDE
Length:1,438
Mass (Da):160,409
Last modified:July 22, 2008 - 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:i8032F880F3403AC8
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
P30182TOP2_ARATH
DNA topoisomerase 2
TOP2 At3g23890, F14O13.7
1,473Annotation score:

Annotation score:5 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

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
CP002686 Genomic DNA Translation: AEE76827.1

NCBI Reference Sequences

More...
RefSeqi
NP_001118686.1, NM_001125214.2

UniGene gene-oriented nucleotide sequence clusters

More...
UniGenei
At.22343

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
AT3G23890.2; AT3G23890.2; AT3G23890

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
821972

Gramene; a comparative resource for plants

More...
Gramenei
AT3G23890.2; AT3G23890.2; AT3G23890

<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
CP002686 Genomic DNA Translation: AEE76827.1
RefSeqiNP_001118686.1, NM_001125214.2
UniGeneiAt.22343

3D structure databases

ProteinModelPortaliB3H4G2
SMRiB3H4G2
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiAT3G23890.2; AT3G23890.2; AT3G23890
GeneIDi821972
GrameneiAT3G23890.2; AT3G23890.2; AT3G23890

Organism-specific databases

AraportiAT3G23890

Phylogenomic databases

eggNOGiKOG0355 Eukaryota
COG0187 LUCA
COG0188 LUCA
HOGENOMiHOG000216693
OMAiDCASARY
OrthoDBi117851at2759

Gene expression databases

ExpressionAtlasiB3H4G2 baseline and differential

Family and domain databases

CDDicd00075 HATPase_c, 1 hit
cd00187 TOP4c, 1 hit
cd03365 TOPRIM_TopoIIA, 1 hit
Gene3Di1.10.268.10, 1 hit
3.30.230.10, 1 hit
3.30.565.10, 1 hit
3.40.50.670, 1 hit
3.90.199.10, 1 hit
InterProiView protein in InterPro
IPR003594 HATPase_C
IPR036890 HATPase_C_sf
IPR020568 Ribosomal_S5_D2-typ_fold
IPR014721 Ribosomal_S5_D2-typ_fold_subgr
IPR001241 Topo_IIA
IPR013760 Topo_IIA-like_dom_sf
IPR002205 Topo_IIA_A/C
IPR013758 Topo_IIA_A/C_ab
IPR013757 Topo_IIA_A_a_sf
IPR013759 Topo_IIA_B_C
IPR013506 Topo_IIA_bsu_dom2
IPR018522 TopoIIA_CS
IPR031660 TOPRIM_C
IPR006171 TOPRIM_domain
IPR034157 TOPRIM_TopoII
PANTHERiPTHR10169 PTHR10169, 1 hit
PfamiView protein in Pfam
PF00204 DNA_gyraseB, 1 hit
PF00521 DNA_topoisoIV, 1 hit
PF02518 HATPase_c, 1 hit
PF01751 Toprim, 1 hit
PF16898 TOPRIM_C, 1 hit
SMARTiView protein in SMART
SM00387 HATPase_c, 1 hit
SM00433 TOP2c, 1 hit
SM00434 TOP4c, 1 hit
SUPFAMiSSF54211 SSF54211, 1 hit
SSF55874 SSF55874, 1 hit
SSF56719 SSF56719, 1 hit
PROSITEiView protein in PROSITE
PS00177 TOPOISOMERASE_II, 1 hit
PS50880 TOPRIM, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
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 nameiB3H4G2_ARATH
<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: B3H4G2
<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: July 22, 2008
Last sequence update: July 22, 2008
Last modified: January 16, 2019
This is version 87 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
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

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