ID A0A316TLW1_9BACT Unreviewed; 847 AA.
AC A0A316TLW1;
DT 10-OCT-2018, integrated into UniProtKB/TrEMBL.
DT 10-OCT-2018, sequence version 1.
DT 27-MAR-2024, entry version 21.
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:PWN05573.1};
GN ORFNames=DDZ15_13295 {ECO:0000313|EMBL:PWN05573.1};
OS Rhodohalobacter mucosus.
OC Bacteria; Balneolota; Balneolia; Balneolales; Balneolaceae;
OC Rhodohalobacter.
OX NCBI_TaxID=2079485 {ECO:0000313|EMBL:PWN05573.1, ECO:0000313|Proteomes:UP000245533};
RN [1] {ECO:0000313|EMBL:PWN05573.1, ECO:0000313|Proteomes:UP000245533}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=8A47 {ECO:0000313|EMBL:PWN05573.1,
RC ECO:0000313|Proteomes:UP000245533};
RA Liu Z.-W.;
RT "Rhodohalobacter halophilus gen. nov., sp. nov., a moderately halophilic
RT member of the family Balneolaceae.";
RL Submitted (MAY-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:PWN05573.1}.
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DR EMBL; QGGB01000009; PWN05573.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A316TLW1; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000245533; 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:UP000245533};
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 520
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 847 AA; 94538 MW; 097A17F7C67E5630 CRC64;
MKSLVIVESP TKTKTIKKYL PKGYIVDSSM GHIRDLPSSA KEIPAKYKKE SWSNLGINVD
DRYDPLYVVP ASKKKIVKKL KDQLKDADEL ILATDEDREG EAISWHLTEL LNPKVPVKRM
VFREITEEAV KNALENFRNI DMNLVHAQET RRILDRLAGY TISPLLWKKI SPGLSAGRVQ
SVAVEFLVER ERERMKFKSG TYFDLKASVS KEGDKHTFTA DLSHLNGKRL ASGKDFDENT
GKLKKPDNVV LLDEKASNDL RDMLREADWS VSAIDVKTQK RNPSAPFITS TLQQEANRKF
GFSARDTMSI AQKLYENGHI TYMRTDSTRL SGQAINAARN AVEQQYGEEY LFERVRNFGK
AKGAQEAHEA IRPAGSSFTM PGKTGLSGRE LKLYDLIWKR TIATQMAEAV LEFTNATIAA
DQNGTRAEFK TTGKKILFPG FFRAYVEGSD DPDAALENQE IFLPELSEGE GIDLHELESI
SHETKPPARF TEATLVKELE KRGVGRPSTY ATIISTIQDR GYARSDGKTL IPSYTAFAVT
ELLEKHIPHV VDSEFTSKLE DKLDEIAKGK YDPVKYLDEY YKGDDGLKNQ VDQQEDKIDP
QEAKLLDLPI DDLNGMQVHV GRFGPYVKTK SDGEEITTSL PVDLDPGELN AEKIKELLAA
EKDGPKSLGK HPETGEDVYV LTGRFGPYVQ LGEVSDDNKK PKRVSLLKGM NPSDVDLETA
LDLLSLPRTL GEHPDTGKVV KAGVGRYGPF VLHDGSFKSL KKTDNVLTVD LNRAVELLKE
KGKGRGSSAI ADLGKHPETD QPIKVLDGRY GPYIKYGRKN ISLPKGTDPE KFTMGDAVRL
IDEKGKK
//
