ID A0A2P8HY63_9BACI Unreviewed; 690 AA.
AC A0A2P8HY63;
DT 23-MAY-2018, integrated into UniProtKB/TrEMBL.
DT 23-MAY-2018, sequence version 1.
DT 27-MAR-2024, entry version 24.
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=B0H94_10188 {ECO:0000313|EMBL:PSL51178.1};
OS Salsuginibacillus halophilus.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Salsuginibacillus.
OX NCBI_TaxID=517424 {ECO:0000313|EMBL:PSL51178.1, ECO:0000313|Proteomes:UP000242310};
RN [1] {ECO:0000313|EMBL:PSL51178.1, ECO:0000313|Proteomes:UP000242310}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CGMCC 1.07653 {ECO:0000313|EMBL:PSL51178.1,
RC ECO:0000313|Proteomes:UP000242310};
RA Whitman W.;
RT "Genomic Encyclopedia of Type Strains, Phase III (KMG-III): the genomes of
RT soil and plant-associated and newly described type strains.";
RL Submitted (MAR-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:PSL51178.1}.
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DR EMBL; PYAV01000001; PSL51178.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2P8HY63; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000242310; Unassembled WGS sequence.
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:UP000242310};
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..121
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 325..347
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 325..342
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 298
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 300
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 490
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 690 AA; 79014 MW; 15D6B499E302E91C CRC64;
MADYLVIVES PAKAKTIGKY LGKKYTVKAS MGHIIDLPKS QMGVDTENDY QPKYITIRGK
GPVLKELKTA AKKAKKVYLA ADPDREGEAI AWHLAHKLDI EEDTKCRVVF NEITKSAIKE
SFKHPRTVNT DLVNAQQARR VLDRLVGYNI SPLLWKKVKK GLSAGRVQSI AVKMIIDRER
EIQNFTPEEY WSIPSVFKHG EETFEAKFHS LNGEKTELKT EEDVNAVLEN LDGDAFNIDE
VKQKERKRNP VNPFTTSSLQ QEAARKLNFR AKKTMLVAQQ LYEGIELGSE GTVGLITYMR
TDSTRISNTA KQEAKEYIEA NYGESYTRKT ERSEKQDANS QDAHEAVRPT AIFKDPKFIK
SYLSRDQYRL YKLIWERMVA SEMAPAIMDT MTVDLSQNGV NFRATGSKVK FSGFMKVYVE
GSDEKKNDEN KFLPDMKEGE TVHKEEITPK QHFTQPPPRY TEARLVRTME ELGIGRPSTF
APTLDTIQRR NYVALEDKRF VPTELGEIVL EQIVEFFPEI LNVEFTAQME NDLDKIEEGS
ADWVEIIDDF YQGFEKRLQV AEEEMKEVEI RDEPAGVDCE ECGHEMVYKM GRYGKFMACS
NFPDCRNTKP ILKEIGVDCP KCEDGSIVER KSKKNRTFFG CDQYPECDFI SWDKPIARPC
PKCSSLLVEK KSKKGVHVQC TSCDYKEEPN
//
