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Q6G767

- TOP3_STAAS

UniProt

Q6G767 - TOP3_STAAS

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Protein
DNA topoisomerase 3
Gene
topB, SAS2145
Organism
Staphylococcus aureus (strain MSSA476)
Status
Reviewed - Annotation score: 3 out of 5 - Protein inferred from homologyi

Functioni

Releases the supercoiling and torsional tension of DNA, which is 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 target site in duplex DNA. 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. The free DNA strand then undergoes passage around the unbroken strand, thus removing DNA supercoils. Finally, in the religation step, the DNA 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone By similarity.UniRule annotation

Catalytic activityi

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

Cofactori

Magnesium By similarity.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi8 – 81Magnesium; catalytic By similarity
Sitei60 – 601Interaction with DNA By similarity
Metal bindingi104 – 1041Magnesium; catalytic By similarity
Sitei167 – 1671Interaction with DNA By similarity
Sitei175 – 1751Interaction with DNA By similarity
Active sitei305 – 3051O-(5'-phospho-DNA)-tyrosine intermediate By similarity
Sitei307 – 3071Interaction with DNA By similarity

GO - Molecular functioni

  1. ATP binding Source: UniProtKB-KW
  2. DNA binding Source: UniProtKB-KW
  3. DNA topoisomerase type I activity Source: UniProtKB-HAMAP
  4. magnesium ion binding Source: UniProtKB-HAMAP

GO - Biological processi

  1. DNA topological change Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Molecular functioni

Isomerase, Topoisomerase

Keywords - Ligandi

DNA-binding, Magnesium, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
DNA topoisomerase 3 (EC:5.99.1.2)
Alternative name(s):
DNA topoisomerase III
Gene namesi
Name:topB
Ordered Locus Names:SAS2145
OrganismiStaphylococcus aureus (strain MSSA476)
Taxonomic identifieri282459 [NCBI]
Taxonomic lineageiBacteriaFirmicutesBacilliBacillalesStaphylococcus
ProteomesiUP000002201: Chromosome

Subcellular locationi

GO - Cellular componenti

  1. chromosome Source: InterPro
Complete GO annotation...

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 711711DNA topoisomerase 3UniRule annotation
PRO_0000286374Add
BLAST

Interactioni

Protein-protein interaction databases

STRINGi282459.SAS2145.

Structurei

3D structure databases

ProteinModelPortaliQ6G767.
SMRiQ6G767. Positions 1-640.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini2 – 135134Toprim
Add
BLAST

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni186 – 1916Interaction with DNA By similarity

Sequence similaritiesi

Contains 1 Toprim domain.

Phylogenomic databases

eggNOGiCOG0551.
HOGENOMiHOG000086847.
KOiK03169.
OMAiTKHDEYF.
OrthoDBiEOG60CWM6.

Family and domain databases

Gene3Di1.10.290.10. 1 hit.
1.10.460.10. 2 hits.
3.40.50.140. 1 hit.
HAMAPiMF_00953. Topoisom_3_prok.
InterProiIPR000380. Topo_IA.
IPR003601. Topo_IA_2.
IPR023406. Topo_IA_AS.
IPR013497. Topo_IA_cen.
IPR013824. Topo_IA_cen_sub1.
IPR013826. Topo_IA_cen_sub3.
IPR023405. Topo_IA_core_domain.
IPR003602. Topo_IA_DNA-bd.
IPR005738. TopoIII.
IPR006171. Toprim_domain.
[Graphical view]
PANTHERiPTHR11390. PTHR11390. 1 hit.
PfamiPF01131. Topoisom_bac. 1 hit.
PF01751. Toprim. 1 hit.
[Graphical view]
PRINTSiPR00417. PRTPISMRASEI.
SMARTiSM00437. TOP1Ac. 1 hit.
SM00436. TOP1Bc. 1 hit.
SM00493. TOPRIM. 1 hit.
[Graphical view]
SUPFAMiSSF56712. SSF56712. 1 hit.
TIGRFAMsiTIGR01056. topB. 1 hit.
PROSITEiPS00396. TOPOISOMERASE_I_PROK. 1 hit.
PS50880. TOPRIM. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q6G767-1 [UniParc]FASTAAdd to Basket

« Hide

MKSLILAEKP SVARDIADAL QINQKRNGYF ENNQYIVTWA LGHLVTNATP    50
EQYDKNLKEW RLEDLPIIPK YMKTVVIGKT SKQFKTVKAL ILDNKVKDII 100
IATDAGREGE LVARLILDKV GNKKPIRRLW ISSVTKKAIQ QGFKNLKDGR 150
QYNDLYYAAL ARSEADWIVG INATRALTTK YDAQLSLGRV QTPTIQLVNT 200
RQQEINQFKP QQYFTLSLTV KGFDFQLESN QRYTNKETLE QMVNNLKNVD 250
GKIKSVATKH KKSYPQSLYN LTDLQQDMYR RYKIGPKETL NTLQSLYERH 300
KVVTYPRTDS NYLTTDMVDT MKERIQATMA TTYKDQARPL MSKTFSSKMS 350
IFNNQKVSDH HAIIPTEVRP VMSDLSNREL KLYDMIVERF LEALMPPHEY 400
DAITVTLEVA GHTFVLKENV TTVLGFKSIR QGESITEMQQ PFSEGDEVKI 450
SKTNIREHET TPPEYFNEGS LLKAMENPQN FIQLKDKKYA QTLKQTGGIG 500
TVATRADIID KLFNMNAIES RDGKIKVTSK GKQILELAPE ELTSPLLTAQ 550
WEEKLLLIER GKYQAKTFIN EMKDFTKDVV NGIKNSDRKY KHDNLTTTEC 600
PTCGKFMIKV KTKNGQMLVC QDPSCKTKKN VQRKTNARCP NCKKKLTLFG 650
KGKEAVYRCV CGHSETQAHM DQRMKSKSSG KVSRKEMKKY MNKNEGLDNN 700
PFKDALKNLN L 711
Length:711
Mass (Da):81,524
Last modified:July 19, 2004 - v1
Checksum:i9C67B5BAC841CBB6
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
BX571857 Genomic DNA. Translation: CAG43956.1.
RefSeqiYP_044257.1. NC_002953.3.

Genome annotation databases

GeneIDi2863413.
KEGGisas:SAS2145.
PATRICi19553923. VBIStaAur96780_2229.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
BX571857 Genomic DNA. Translation: CAG43956.1 .
RefSeqi YP_044257.1. NC_002953.3.

3D structure databases

ProteinModelPortali Q6G767.
SMRi Q6G767. Positions 1-640.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 282459.SAS2145.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 2863413.
KEGGi sas:SAS2145.
PATRICi 19553923. VBIStaAur96780_2229.

Phylogenomic databases

eggNOGi COG0551.
HOGENOMi HOG000086847.
KOi K03169.
OMAi TKHDEYF.
OrthoDBi EOG60CWM6.

Family and domain databases

Gene3Di 1.10.290.10. 1 hit.
1.10.460.10. 2 hits.
3.40.50.140. 1 hit.
HAMAPi MF_00953. Topoisom_3_prok.
InterProi IPR000380. Topo_IA.
IPR003601. Topo_IA_2.
IPR023406. Topo_IA_AS.
IPR013497. Topo_IA_cen.
IPR013824. Topo_IA_cen_sub1.
IPR013826. Topo_IA_cen_sub3.
IPR023405. Topo_IA_core_domain.
IPR003602. Topo_IA_DNA-bd.
IPR005738. TopoIII.
IPR006171. Toprim_domain.
[Graphical view ]
PANTHERi PTHR11390. PTHR11390. 1 hit.
Pfami PF01131. Topoisom_bac. 1 hit.
PF01751. Toprim. 1 hit.
[Graphical view ]
PRINTSi PR00417. PRTPISMRASEI.
SMARTi SM00437. TOP1Ac. 1 hit.
SM00436. TOP1Bc. 1 hit.
SM00493. TOPRIM. 1 hit.
[Graphical view ]
SUPFAMi SSF56712. SSF56712. 1 hit.
TIGRFAMsi TIGR01056. topB. 1 hit.
PROSITEi PS00396. TOPOISOMERASE_I_PROK. 1 hit.
PS50880. TOPRIM. 1 hit.
[Graphical view ]
ProtoNeti Search...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: MSSA476.

Entry informationi

Entry nameiTOP3_STAAS
AccessioniPrimary (citable) accession number: Q6G767
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 1, 2007
Last sequence update: July 19, 2004
Last modified: September 3, 2014
This is version 70 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi