ID A0A3M8G0Y7_9BACT Unreviewed; 846 AA.
AC A0A3M8G0Y7;
DT 13-FEB-2019, integrated into UniProtKB/TrEMBL.
DT 13-FEB-2019, sequence version 1.
DT 27-MAR-2024, entry version 17.
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:RNC83995.1};
GN ORFNames=ED557_09505 {ECO:0000313|EMBL:RNC83995.1};
OS Balneola sp.
OC Bacteria; Balneolota; Balneolia; Balneolales; Balneolaceae; Balneola.
OX NCBI_TaxID=2024824 {ECO:0000313|EMBL:RNC83995.1, ECO:0000313|Proteomes:UP000280416};
RN [1] {ECO:0000313|EMBL:RNC83995.1, ECO:0000313|Proteomes:UP000280416}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Bin6 {ECO:0000313|EMBL:RNC83995.1};
RA Zheng Q., Wang Y., Jiao N.;
RT "Metagenomics and metaproteomics analyze the interactions between
RT Synechococcus and associated heterotrophic bacteria in one oligotrophic
RT Synechococcus culture.";
RL Submitted (OCT-2018) 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: 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:RNC83995.1}.
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DR EMBL; RHLJ01000003; RNC83995.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A3M8G0Y7; -.
DR Proteomes; UP000280416; 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; 1.
DR Pfam; PF01751; Toprim; 1.
DR Pfam; PF13368; Toprim_C_rpt; 4.
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:UP000280416};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00952}.
FT DOMAIN 2..126
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 175..180
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 322
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 32
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 151
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 152
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 160
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 167
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 324
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 521
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 846 AA; 94544 MW; 4E98197FCC5F911A CRC64;
MKSLVIVESP TKTKTISKYL PKGYEVDSSM GHIRDLPASA KLIPAKYKKE SWATLGINPD
DRYYAIYVTP PDKKKIVKRL KDKLKGVDEL ILATDEDREG EAISWHLLEV LKPKVPVKRM
VFREITKEAV QNALENTRDI DMNLVFAQET RRILDRLAGY TVSPLLWKKI SPGLSAGRVQ
SVAVEFLVER ERERMKFRSG TYYDLQAMLQ KSGENDEFKA DLTHLNGTRI ASGKDFDENT
GKLKKPDSVV LLDEDKASTL VDDLKSANWT VTNVEVNTQK RNPSAPFITS TLQQEANRKL
GMSARDTMSV AQKLYEKGFI TYMRTDSTRL SSQAIEAARE GILEQYGEEY LFERVRNYTA
KGKTAQEAHE AIRPSGSRFI LPEKSGLKDR ELKLYDMIWK RTIATQMAEA ELEFTGVTIT
ATNNDTSADF RASGKKILFP GFFRAYVEGS DDPEAALENQ ENFLPELKEN DSTELQDLKF
NSHETKPPAR FTEATLVKEL EKSGVGRPST YAAVISTIQD RGYARLDGKA LVPTFTAFAV
TSLLEEHFPD LVNSAFTSAL EDKLDGVANG TEDPVKYLDD YYKGENGLKA KVEKQEDKID
PQKAKLLDLP LDGLQGIQVA VGRFGPYAKM QKDGEEVSTS LPLDLDPSDI TVEKLEQLIK
LSEEEDKPLG VHPEEGLPVF LLSGRYGPYV QLGEVTEENK KPKRVSLLKG MTPEDMDFET
AIKLLQLPRT LGEHPEDGKV VKAGVGRFGP FVVHDGKFKS IPKTGNVLEI QLGEAIELLN
QKTAPRKSSE LKDLGKHPDT ELPIKVMDGR YGPYIKHGKK NIGLPKDTDP EKFTLGDAID
LIAAKG
//
