ID A0A0D8I7E2_9CLOT Unreviewed; 690 AA.
AC A0A0D8I7E2;
DT 27-MAY-2015, integrated into UniProtKB/TrEMBL.
DT 27-MAY-2015, sequence version 1.
DT 27-MAR-2024, entry version 39.
DE RecName: Full=DNA topoisomerase 1 {ECO:0000256|HAMAP-Rule:MF_00952};
DE EC=5.6.2.1 {ECO:0000256|HAMAP-Rule:MF_00952};
DE AltName: Full=DNA topoisomerase I {ECO:0000256|HAMAP-Rule:MF_00952};
GN Name=topA {ECO:0000256|HAMAP-Rule:MF_00952,
GN ECO:0000313|EMBL:AKL95492.1};
GN ORFNames=CACET_c20440 {ECO:0000313|EMBL:AKL95492.1}, TZ02_15805
GN {ECO:0000313|EMBL:KJF25974.1};
OS Clostridium aceticum.
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Clostridiaceae;
OC Clostridium.
OX NCBI_TaxID=84022 {ECO:0000313|EMBL:AKL95492.1, ECO:0000313|Proteomes:UP000035704};
RN [1] {ECO:0000313|EMBL:AKL95492.1, ECO:0000313|Proteomes:UP000035704}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 1496 {ECO:0000313|EMBL:AKL95492.1,
RC ECO:0000313|Proteomes:UP000035704};
RA Poehlein A., Schiel-Bengelsdorf B., Gottschalk G., Duerre P., Daniel R.;
RT "Genome sequence of Clostridium aceticum DSM 1496.";
RL Submitted (OCT-2014) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:KJF25974.1, ECO:0000313|Proteomes:UP000032372}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 1496 {ECO:0000313|EMBL:KJF25974.1,
RC ECO:0000313|Proteomes:UP000032372};
RA Song Y., Hwang S., Cho B.-K.;
RT "Draft genome sequence of Clostridium aceticum DSM 1496, a potential
RT butanol broducer through syngas fermentation.";
RL Submitted (FEB-2015) to the EMBL/GenBank/DDBJ databases.
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:0000256|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;
CC Evidence={ECO:0000256|ARBA:ARBA00000213, ECO:0000256|HAMAP-
CC Rule:MF_00952};
CC -!- SUBUNIT: Monomer. {ECO:0000256|HAMAP-Rule:MF_00952}.
CC -!- SIMILARITY: Belongs to the type IA topoisomerase family.
CC {ECO:0000256|ARBA:ARBA00009446, ECO:0000256|HAMAP-Rule:MF_00952}.
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DR EMBL; CP009687; AKL95492.1; -; Genomic_DNA.
DR EMBL; JYHU01000021; KJF25974.1; -; Genomic_DNA.
DR RefSeq; WP_044825956.1; NZ_JYHU01000021.1.
DR AlphaFoldDB; A0A0D8I7E2; -.
DR STRING; 84022.CACET_c20440; -.
DR KEGG; cace:CACET_c20440; -.
DR PATRIC; fig|84022.5.peg.1849; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000032372; Unassembled WGS sequence.
DR Proteomes; UP000035704; 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 SUPFAM; SSF57783; Zinc beta-ribbon; 1.
DR PROSITE; PS00396; TOPOISOMERASE_I_PROK; 1.
DR PROSITE; PS50880; TOPRIM; 1.
PE 3: Inferred from homology;
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|HAMAP-
KW Rule:MF_00952};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_00952};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Reference proteome {ECO:0000313|Proteomes:UP000035704};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}; Zinc {ECO:0000256|ARBA:ARBA00022833};
KW Zinc-finger {ECO:0000256|ARBA:ARBA00022771}.
FT DOMAIN 3..113
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 163..168
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 299
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 33
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 139
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 140
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 143
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 148
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 155
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 301
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 488
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 690 AA; 78597 MW; 85A1FAC9EBBC9AD9 CRC64;
MTKSLVIVES PAKAKTIKKF LGNNYVVKAS VGHIIDLPKS KLGIDIENNF NPQYITIRGK
GPVLKEIKAE AKKAKKIYLA TDPDREGEAI SWHLSNALNI QEDIPCRIEF NEITKNAVKN
AIKKPRVIDK SLVDAQQARR VLDRLVGYKI SPLLWRKMRK GLSAGRVQSV ATKIIKDREE
EIKSFIPEEY WSLVLKVQTS QKEKFEVKFA SDDLGNKDIK SQDEVNRIIT LIENKDLTVT
VVKESTKKRN PNLPFTTSTL QQEASNKMGF STKKTMSIAQ QLYEGIDLEK EGTVGLITYI
RTDSTRLSEE ATKGAQQYIL DDLGEKYLNQ APKTAGKKNQ EIQDAHEAIR PTDVNRHPDS
IRASLSKDQY KLYKLIWERF LSSQMTAAVY DTLSIELKVE NVTFKVTGSR LNFDGFLRVY
SFASVSEELN LPLLKVGDVI NILNIIPNQH FTQPPPRYTE ASLVKTMEEL GIGRPSTYSP
TISTILSRGY VEKEGKHLVL TELGALVTEI LEEYFTDIID INFTADFEKS LDNIEEGKED
WRQLIKNFYV FFEKMLIKAD EGIEEIDLVE ESDEDCDACN AKMLIKYGRY GKFLACSNYP
DCTFTKPIVH KIGVKCPKCE DGEIIERKSK KGRTFYGCSE FPKCRFVSWS RPINEKCPDC
NSLLTHKINK KSEKIMCTNK ECKYTREVNS
//
