ID   TOP1_STAAN              Reviewed;         689 AA.
AC   Q7A5Y5;
DT   01-MAY-2007, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   27-MAR-2024, entry version 124.
DE   RecName: Full=DNA topoisomerase 1 {ECO:0000255|HAMAP-Rule:MF_00952};
DE            EC=5.6.2.1 {ECO:0000255|HAMAP-Rule:MF_00952};
DE   AltName: Full=DNA topoisomerase I {ECO:0000255|HAMAP-Rule:MF_00952};
DE   AltName: Full=Omega-protein;
DE   AltName: Full=Relaxing enzyme;
DE   AltName: Full=Swivelase;
DE   AltName: Full=Untwisting enzyme;
GN   Name=topA {ECO:0000255|HAMAP-Rule:MF_00952}; OrderedLocusNames=SA1093;
OS   Staphylococcus aureus (strain N315).
OC   Bacteria; Bacillota; Bacilli; Bacillales; Staphylococcaceae;
OC   Staphylococcus.
OX   NCBI_TaxID=158879;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=N315;
RX   PubMed=11418146; DOI=10.1016/s0140-6736(00)04403-2;
RA   Kuroda M., Ohta T., Uchiyama I., Baba T., Yuzawa H., Kobayashi I., Cui L.,
RA   Oguchi A., Aoki K., Nagai Y., Lian J.-Q., Ito T., Kanamori M.,
RA   Matsumaru H., Maruyama A., Murakami H., Hosoyama A., Mizutani-Ui Y.,
RA   Takahashi N.K., Sawano T., Inoue R., Kaito C., Sekimizu K., Hirakawa H.,
RA   Kuhara S., Goto S., Yabuzaki J., Kanehisa M., Yamashita A., Oshima K.,
RA   Furuya K., Yoshino C., Shiba T., Hattori M., Ogasawara N., Hayashi H.,
RA   Hiramatsu K.;
RT   "Whole genome sequencing of meticillin-resistant Staphylococcus aureus.";
RL   Lancet 357:1225-1240(2001).
RN   [2]
RP   IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS].
RC   STRAIN=N315;
RA   Vaezzadeh A.R., Deshusses J., Lescuyer P., Hochstrasser D.F.;
RT   "Shotgun proteomic analysis of total and membrane protein extracts of S.
RT   aureus strain N315.";
RL   Submitted (OCT-2007) to UniProtKB.
CC   -!- FUNCTION: Releases the supercoiling and torsional tension of DNA, which
CC       is introduced during the DNA replication and transcription, by
CC       transiently cleaving and rejoining one strand of the DNA duplex.
CC       Introduces a single-strand break via transesterification at a target
CC       site in duplex DNA. The scissile phosphodiester is attacked by the
CC       catalytic tyrosine of the enzyme, resulting in the formation of a DNA-
CC       (5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH
CC       DNA strand. The free DNA strand then undergoes passage around the
CC       unbroken strand, thus removing DNA supercoils. Finally, in the
CC       religation step, the DNA 3'-OH attacks the covalent intermediate to
CC       expel the active-site tyrosine and restore the DNA phosphodiester
CC       backbone. {ECO:0000255|HAMAP-Rule:MF_00952}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP-independent breakage of single-stranded DNA, followed by
CC         passage and rejoining.; EC=5.6.2.1; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00952};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00952};
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_00952}.
CC   -!- SIMILARITY: Belongs to the type IA topoisomerase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00952}.
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DR   EMBL; BA000018; BAB42345.1; -; Genomic_DNA.
DR   PIR; E89898; E89898.
DR   AlphaFoldDB; Q7A5Y5; -.
DR   SMR; Q7A5Y5; -.
DR   EnsemblBacteria; BAB42345; BAB42345; BAB42345.
DR   KEGG; sau:SA1093; -.
DR   HOGENOM; CLU_002929_4_3_9; -.
DR   Proteomes; UP000000751; Chromosome.
DR   GO; GO:0005694; C:chromosome; IEA:InterPro.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0003917; F:DNA topoisomerase type I (single strand cut, ATP-independent) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0006265; P:DNA topological change; IEA:UniProtKB-UniRule.
DR   CDD; cd00186; TOP1Ac; 1.
DR   CDD; cd03363; TOPRIM_TopoIA_TopoI; 1.
DR   Gene3D; 3.40.50.140; -; 1.
DR   Gene3D; 3.30.65.10; Bacterial Topoisomerase I, domain 1; 2.
DR   Gene3D; 1.10.460.10; Topoisomerase I, domain 2; 1.
DR   Gene3D; 2.70.20.10; Topoisomerase I, domain 3; 1.
DR   Gene3D; 1.10.290.10; Topoisomerase I, domain 4; 1.
DR   HAMAP; MF_00952; Topoisom_1_prok; 1.
DR   InterPro; IPR000380; Topo_IA.
DR   InterPro; IPR003601; Topo_IA_2.
DR   InterPro; IPR023406; Topo_IA_AS.
DR   InterPro; IPR013497; Topo_IA_cen.
DR   InterPro; IPR013824; Topo_IA_cen_sub1.
DR   InterPro; IPR013825; Topo_IA_cen_sub2.
DR   InterPro; IPR013826; Topo_IA_cen_sub3.
DR   InterPro; IPR023405; Topo_IA_core_domain.
DR   InterPro; IPR003602; Topo_IA_DNA-bd_dom.
DR   InterPro; IPR013498; Topo_IA_Znf.
DR   InterPro; IPR005733; TopoI_bac-type.
DR   InterPro; IPR028612; Topoisom_1_IA.
DR   InterPro; IPR006171; TOPRIM_domain.
DR   InterPro; IPR034149; TOPRIM_TopoI.
DR   NCBIfam; TIGR01051; topA_bact; 1.
DR   PANTHER; PTHR42785:SF1; DNA TOPOISOMERASE; 1.
DR   PANTHER; PTHR42785; DNA TOPOISOMERASE, TYPE IA, CORE; 1.
DR   Pfam; PF01131; Topoisom_bac; 1.
DR   Pfam; PF01751; Toprim; 1.
DR   Pfam; PF01396; zf-C4_Topoisom; 3.
DR   PRINTS; PR00417; PRTPISMRASEI.
DR   SMART; SM00437; TOP1Ac; 1.
DR   SMART; SM00436; TOP1Bc; 1.
DR   SMART; SM00493; TOPRIM; 1.
DR   SUPFAM; SSF56712; Prokaryotic type I DNA topoisomerase; 1.
DR   PROSITE; PS00396; TOPO_IA_1; 1.
DR   PROSITE; PS52039; TOPO_IA_2; 1.
DR   PROSITE; PS50880; TOPRIM; 1.
PE   1: Evidence at protein level;
KW   DNA-binding; Isomerase; Magnesium; Metal-binding; Repeat; Topoisomerase;
KW   Zinc; Zinc-finger.
FT   CHAIN           1..689
FT                   /note="DNA topoisomerase 1"
FT                   /id="PRO_0000285941"
FT   DOMAIN          3..113
FT                   /note="Toprim"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   DOMAIN          129..557
FT                   /note="Topo IA-type catalytic"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01383"
FT   ZN_FING         577..603
FT                   /note="C4-type 1"
FT   ZN_FING         617..645
FT                   /note="C4-type 2"
FT   ZN_FING         658..681
FT                   /note="C4-type 3"
FT   REGION          163..168
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   REGION          328..357
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        328..342
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        298
FT                   /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01383"
FT   BINDING         9
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   BINDING         82
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            33
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            139
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            140
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            143
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            148
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            155
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            300
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
FT   SITE            488
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00952"
SQ   SEQUENCE   689 AA;  79071 MW;  05A19252CCC9EFDD CRC64;
     MADNLVIVES PAKAKTIEKY LGKKYKVIAS MGHVRDLPRS QMGVDTEDNY EPKYITIRGK
     GPVVKELKKH AKKAKNVFLA SDPDREGEAI AWHLSKILEL EDSKENRVVF NEITKDAVKE
     SFKNPREIEM NLVDAQQARR ILDRLVGYNI SPVLWKKVKK GLSAGRVQSV ALRLVIDREN
     EIRNFKPEEY WTIEGEFRYK KSKFNAKFLH YKNKPFKLKT KKDVEKITAA LDGDQFEITN
     VTKKEKTRNP ANPFTTSTLQ QEAARKLNFK ARKTMMVAQQ LYEGIDLKKQ GTIGLITYMR
     TDSTRISDTA KAEAKQYITD KYGESYTSKR KASGKQGDQD AHEAIRPSST MRTPDDMKSF
     LTKDQYRLYK LIWERFVASQ MAPAILDTVS LDITQGDIKF RANGQTIKFK GFMTLYVETK
     DDSDSEKENK LPKLEQGDKV TATQIEPAQH YTQPPPRYTE ARLVKTLEEL KIGRPSTYAP
     TIDTIQKRNY VKLESKRFVP TELGEIVHEQ VKEYFPEIID VEFTVNMETL LDKIAEGDIT
     WRKVIDGFFS SFKQDVERAE EEMEKIEIKD EPAGEDCEVC GSPMVIKMGR YGKFMACSNF
     PDCRNTKAIV KSIGVKCPKC NDGDVVERKS KKNRVFYGCS KYPECDFISW DKPIGRDCPK
     CNQYLVENKK GKTTQVICSN CDYKEAAQK
//