ID A0A1H8BWS9_9BACT Unreviewed; 770 AA.
AC A0A1H8BWS9;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 27-MAR-2024, entry version 26.
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 ORFNames=SAMN04487902_104166 {ECO:0000313|EMBL:SEM87029.1};
OS Prevotella sp. ne3005.
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Prevotellaceae;
OC Prevotella.
OX NCBI_TaxID=1761887 {ECO:0000313|EMBL:SEM87029.1, ECO:0000313|Proteomes:UP000199132};
RN [1] {ECO:0000313|Proteomes:UP000199132}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NE3005 {ECO:0000313|Proteomes:UP000199132};
RA Varghese N., Submissions S.;
RL Submitted (OCT-2016) 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}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00952}.
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DR EMBL; FOCK01000004; SEM87029.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1H8BWS9; -.
DR STRING; 1761887.SAMN04487902_104166; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000199132; Unassembled WGS sequence.
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; 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; IPR005733; TopoI_bac-type.
DR InterPro; IPR028612; Topoisom_1_IA.
DR InterPro; IPR025589; Toprim_C_rpt.
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; 2.
DR Pfam; PF01751; Toprim; 1.
DR Pfam; PF13368; Toprim_C_rpt; 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; 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:UP000199132};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}.
FT DOMAIN 3..112
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 162..167
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 287
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 138
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 142
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 154
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 289
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 478
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 770 AA; 87968 MW; 3B99D36E8B81C9CD CRC64;
MQKNLVIVES PAKAKTIEKF LGKDFKVMSS YGHIRDLKKR ELSIDDRTLE PEYEIPEEKA
KLVADLRSKA DKAEKVWLAS DEDREGEAIS WHLCEVLGLD KQKTNRIVFH EITKPAILEA
IEHPRHLNMN LVNAQQARRV LDRIVGFKLS PVLWRKVKPA LSAGRVQSVA VRLIVERERE
IQNFQSEVYY SVSGIFAITN ADGSASEVKA QLASRFKTEG EVMAFLEKCK DATFTVESIS
KKPMKRTPAP PFTTSTLQQE AARKLGFSVS QTMMVAQRLY ESGRITYMRT DSVNLSKLCL
SASKNEIVNL YGDKYSKTRQ YHTSAKGAQE AHEAIRPTYM DQVEIDGTAQ EKRLYELIWK
RTIASQMADA EIEKTTVNIQ ISNTNEMFVA QGEVVKFDGF IKVYRESSDD DEQQDEFGHI
LPPMKKDQEL TRREILATER FSAGPQRYTE ASLVKKMEEL GIGRPSTYAP TISTIQQRDY
VQRGDKKGEE RSYTLLQLKG KQVTQKTRKE IVGSEKGKLL PTDIGMVVND FLMEHFKDIM
DYNFTAKVEQ DFDKIAEGGE MWTDMMKQFY NSFEPVVEET MNSRQQHKAG ERLLGNDPKT
GRPVFVKIGR FGPVVQIGSA DDREKPLFAQ LPKEQSMETI TIDEAMELFK LPREIGEYEG
KPVTIGAGRF GPYVLHDRQY TSIPKGTDPM GITLDDAILL IQEKRQQDSK KHMKFFLEDP
KLEILNGRYG PYLTYDGKNY RLPKSLHEKV TELTYGECMK IIQSTPTNRK
//
