ID A0A2N4SB59_9BACT Unreviewed; 790 AA.
AC A0A2N4SB59;
DT 25-APR-2018, integrated into UniProtKB/TrEMBL.
DT 25-APR-2018, sequence version 1.
DT 27-MAR-2024, entry version 25.
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:PLB87322.1};
GN ORFNames=C0T31_00050 {ECO:0000313|EMBL:PLB87322.1};
OS Dysgonamonadaceae bacterium.
OC Bacteria; Bacteroidota; Bacteroidia; Bacteroidales; Dysgonomonadaceae.
OX NCBI_TaxID=2065189 {ECO:0000313|EMBL:PLB87322.1, ECO:0000313|Proteomes:UP000234415};
RN [1] {ECO:0000313|EMBL:PLB87322.1, ECO:0000313|Proteomes:UP000234415}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=XHS2771 {ECO:0000313|EMBL:PLB87322.1,
RC ECO:0000313|Proteomes:UP000234415};
RA Vasudevan G., Joshi A.J., Hivarkar S., Lanjekar V.B., Engineer A.S.,
RA Dhakephalkar P.K., Dagar S.;
RT "Anaerobic cellulose degrading bacterium isolated from hot springs that can
RT be used for biotechnological applications.";
RL Submitted (DEC-2017) 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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:PLB87322.1}.
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DR EMBL; PKMK01000001; PLB87322.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2N4SB59; -.
DR OrthoDB; 9803554at2; -.
DR Proteomes; UP000234415; 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:UP000234415};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}.
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 REGION 761..790
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 775..790
FT /note="Basic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
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 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 155
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 477
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 790 AA; 89378 MW; 986A1E649644F1DA CRC64;
MAKNLVIVES PAKAKTIEKF LGKDFHVMSS YGHIRDLKKK DFSIDIEHQF TPIYEIPADK
KKVVSELKEA AKNADTVWLA SDEDREGEAI SWHLYEVLGL KNKDTKRIVF HEITKPAILA
AIENPRQIDQ NLVDAQQARR VLDRIVGFEL SPVLWRKIKP ALSAGRVQSV AVRLIVERER
EIQNFKSEAT YRIVAVFTKE ENGQTYEIKA EYNKRLKTKK EALALLEKLK SSTFTVGDIV
TKPVKRSPAP PFTTSTLQQE ASRKLGFSVA QTMMVAQRLY ESGKITYMRT DSVNLSTLAL
NLAKSEIKEL YGDRYVKTRQ FTTKSKGAQE AHEAIRPTYL NQQDIEGTAQ EKRLYDLIRK
RTIASQMADA ELEKTTANID ISNADGKFVA TGEVVKFDGF LRVYTEGTDD EEADNESGLL
APMKKGEALV MNETNATERF TQHPPRYTEA SLVRKMEELG IGRPSTYAPT ISTILNRGYV
EKRNVEEEPR TYNILTLKNG KIQDVVKKEK TAIDKGKLVP TDIGMVVNDF LVEYFPSIVD
YNFTAEVEKD FDQIAEGKAK WNKSISDFYK EFHPIVEDTL NMRSEHKVGE RILGTDPKSG
RQVSVKIGRF GPLAQIGTSD EEEKPIFASL QNGHSIETIT LEEALKLFEL PRHLGEFRGK
EMTVGVGRFG PYVKHDGKYV SLPKEMDPLK ITAEEAIALI EAKEQKDREK IIKTFPEEPE
LQVLNGRYGP YISFQKENYK IPKKMNPSEL TLDDCRAIIA ETGNDKDKTK GKSAKKQTGT
KKTTPKKSAK
//
