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Q6G9W3

- TOP1_STAAS

UniProt

Q6G9W3 - TOP1_STAAS

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Protein

DNA topoisomerase 1

Gene
topA, SAS1184
Organism
Staphylococcus aureus (strain MSSA476)
Status
Reviewed - Annotation score: 4 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. Binds two Mg2+ per subunit By similarity.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi9 – 91Magnesium 1; catalytic By similarity
Sitei33 – 331Interaction with DNA By similarity
Metal bindingi82 – 821Magnesium 1; catalytic By similarity
Metal bindingi82 – 821Magnesium 2 By similarity
Metal bindingi84 – 841Magnesium 2 By similarity
Sitei139 – 1391Interaction with DNA By similarity
Sitei140 – 1401Interaction with DNA By similarity
Sitei143 – 1431Interaction with DNA By similarity
Sitei148 – 1481Interaction with DNA By similarity
Sitei155 – 1551Interaction with DNA By similarity
Active sitei298 – 2981O-(5'-phospho-DNA)-tyrosine intermediate By similarity
Sitei300 – 3001Interaction with DNA By similarity
Sitei488 – 4881Interaction with DNA By similarity

Regions

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Zinc fingeri577 – 60327C4-type 1UniRule annotationAdd
BLAST
Zinc fingeri617 – 64529C4-type 2UniRule annotationAdd
BLAST
Zinc fingeri658 – 68124C4-type 3UniRule annotationAdd
BLAST

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, Zinc

Names & Taxonomyi

Protein namesi
Recommended name:
DNA topoisomerase 1 (EC:5.99.1.2)
Alternative name(s):
DNA topoisomerase I
Omega-protein
Relaxing enzyme
Swivelase
Untwisting enzyme
Gene namesi
Name:topA
Ordered Locus Names:SAS1184
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 – 689689DNA topoisomerase 1UniRule annotationPRO_0000285938Add
BLAST

Proteomic databases

PRIDEiQ6G9W3.

Interactioni

Subunit structurei

Monomer By similarity.UniRule annotation

Protein-protein interaction databases

STRINGi282459.SAS1184.

Structurei

3D structure databases

ProteinModelPortaliQ6G9W3.
SMRiQ6G9W3. Positions 5-609.

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Domaini3 – 113111ToprimAdd
BLAST

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni163 – 1686Interaction with DNA By similarity

Sequence similaritiesi

Contains 1 Toprim domain.

Zinc finger

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Zinc fingeri577 – 60327C4-type 1UniRule annotationAdd
BLAST
Zinc fingeri617 – 64529C4-type 2UniRule annotationAdd
BLAST
Zinc fingeri658 – 68124C4-type 3UniRule annotationAdd
BLAST

Keywords - Domaini

Repeat, Zinc-finger

Phylogenomic databases

eggNOGiCOG0551.
HOGENOMiHOG000004018.
KOiK03168.
OMAiVVECDKC.
OrthoDBiEOG6S7XQ9.

Family and domain databases

Gene3Di1.10.460.10. 2 hits.
2.70.20.10. 2 hits.
3.40.50.140. 1 hit.
HAMAPiMF_00952. Topoisom_1_prok.
InterProiIPR000380. Topo_IA.
IPR003601. Topo_IA_2.
IPR023406. Topo_IA_AS.
IPR013497. Topo_IA_cen.
IPR013824. Topo_IA_cen_sub1.
IPR013825. Topo_IA_cen_sub2.
IPR023405. Topo_IA_core_domain.
IPR003602. Topo_IA_DNA-bd.
IPR013498. Topo_IA_Znf.
IPR005733. TopoI_bac-type.
IPR028612. Topoisom_1_IA.
IPR006171. Toprim_domain.
[Graphical view]
PANTHERiPTHR11390. PTHR11390. 1 hit.
PfamiPF01131. Topoisom_bac. 1 hit.
PF01751. Toprim. 1 hit.
PF01396. zf-C4_Topoisom. 2 hits.
[Graphical view]
PRINTSiPR00417. PRTPISMRASEI.
SMARTiSM00437. TOP1Ac. 1 hit.
SM00436. TOP1Bc. 1 hit.
SM00493. TOPRIM. 1 hit.
[Graphical view]
SUPFAMiSSF56712. SSF56712. 1 hit.
TIGRFAMsiTIGR01051. topA_bact. 1 hit.
PROSITEiPS00396. TOPOISOMERASE_I_PROK. 1 hit.
PS50880. TOPRIM. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q6G9W3-1 [UniParc]FASTAAdd to Basket

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MADNLVIVES PAKAKTIEKY LGKKYKVIAS MGHVRDLPRS QMGVDTEDNY    50
EPKYITIRGK GPVVKELKKH AKKAKNVFLA SDPDREGEAI AWHLSKILEL 100
EDSKENRVVF NEITKDAVKE SFKNPREIEM NLVDAQQARR ILDRLVGYNI 150
SPVLWKKVKK GLSAGRVQSV ALRLVIDREN EIRNFKPEEY WTIEGEFRYK 200
KSKFNAKFLH YKNKPFKLKT KKDVEKITAA LDGDQFEITN VTKKEKTRNP 250
ANPFTTSTLQ QEAARKLNFK ARKTMMVAQQ LYEGIDLKKQ GTIGLITYMR 300
TDSTRISDTA KAEAKQYITD KYGESYTSKR KASGKQGDQD AHEAIRPSST 350
MRTPDDMKSF LTKDQYRLYK LIWERFVASQ MAPAILDTVS LDITQGDIKF 400
RANGQTIKFK GFMTLYVETK DDSDSEKENK LPKLEQGDKV TATQIEPAQH 450
YTQPPPRYTE ARLVKTLEEL KIGRPSTYAP TIDTIQKRNY VKLESKRFVP 500
TELGEIVHEQ VKEYFPEIID VEFTVNMETL LDKIAEGDIT WRKVIDGFFS 550
SFKQDVERAE EEMEKIEIKD EPAGEDCEVC GSPMVIKMGR YGKFMACSNF 600
PDCRNTKAIV KSIGVKCPKC NDGDVVERKS KKNRVFYGCS KYPECDFISW 650
DKPIGRDCPK CNQYLVENKK GKTTQVICSN CDYKEAAQK 689
Length:689
Mass (Da):79,071
Last modified:July 19, 2004 - v1
Checksum:i05A19252CCC9EFDD
GO

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
BX571857 Genomic DNA. Translation: CAG42961.1.
RefSeqiYP_043310.1. NC_002953.3.

Genome annotation databases

GeneIDi2862413.
KEGGisas:SAS1184.
PATRICi19551831. VBIStaAur96780_1233.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBL
GenBank
DDBJ
Links Updated
BX571857 Genomic DNA. Translation: CAG42961.1 .
RefSeqi YP_043310.1. NC_002953.3.

3D structure databases

ProteinModelPortali Q6G9W3.
SMRi Q6G9W3. Positions 5-609.
ModBasei Search...
MobiDBi Search...

Protein-protein interaction databases

STRINGi 282459.SAS1184.

Proteomic databases

PRIDEi Q6G9W3.

Protocols and materials databases

Structural Biology Knowledgebase Search...

Genome annotation databases

GeneIDi 2862413.
KEGGi sas:SAS1184.
PATRICi 19551831. VBIStaAur96780_1233.

Phylogenomic databases

eggNOGi COG0551.
HOGENOMi HOG000004018.
KOi K03168.
OMAi VVECDKC.
OrthoDBi EOG6S7XQ9.

Family and domain databases

Gene3Di 1.10.460.10. 2 hits.
2.70.20.10. 2 hits.
3.40.50.140. 1 hit.
HAMAPi MF_00952. Topoisom_1_prok.
InterProi 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.
IPR023405. Topo_IA_core_domain.
IPR003602. Topo_IA_DNA-bd.
IPR013498. Topo_IA_Znf.
IPR005733. TopoI_bac-type.
IPR028612. Topoisom_1_IA.
IPR006171. Toprim_domain.
[Graphical view ]
PANTHERi PTHR11390. PTHR11390. 1 hit.
Pfami PF01131. Topoisom_bac. 1 hit.
PF01751. Toprim. 1 hit.
PF01396. zf-C4_Topoisom. 2 hits.
[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 TIGR01051. topA_bact. 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 nameiTOP1_STAAS
AccessioniPrimary (citable) accession number: Q6G9W3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 1, 2007
Last sequence update: July 19, 2004
Last modified: September 3, 2014
This is version 79 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

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