ID A0A068R358_9GAMM Unreviewed; 865 AA.
AC A0A068R358;
DT 01-OCT-2014, integrated into UniProtKB/TrEMBL.
DT 01-OCT-2014, sequence version 1.
DT 27-MAR-2024, entry version 51.
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:CDG21331.1};
GN ORFNames=XPG1_1676 {ECO:0000313|EMBL:CDG21331.1};
OS Xenorhabdus poinarii G6.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Morganellaceae; Xenorhabdus.
OX NCBI_TaxID=1354304 {ECO:0000313|EMBL:CDG21331.1, ECO:0000313|Proteomes:UP000032735};
RN [1] {ECO:0000313|EMBL:CDG21331.1, ECO:0000313|Proteomes:UP000032735}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=G6 {ECO:0000313|EMBL:CDG21331.1,
RC ECO:0000313|Proteomes:UP000032735};
RA Genoscope - CEA;
RL Submitted (JUL-2013) 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 ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; FO704551; CDG21331.1; -; Genomic_DNA.
DR RefSeq; WP_045958545.1; NZ_FO704551.1.
DR AlphaFoldDB; A0A068R358; -.
DR STRING; 1354304.XPG1_1676; -.
DR KEGG; xpo:XPG1_1676; -.
DR HOGENOM; CLU_002929_4_3_6; -.
DR OrthoDB; 9804262at2; -.
DR Proteomes; UP000032735; Chromosome.
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; 2.20.25.10; -; 1.
DR Gene3D; 3.40.50.140; -; 1.
DR Gene3D; 3.30.65.10; Bacterial Topoisomerase I, domain 1; 3.
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; IPR049330; TOP1_Znf.
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; IPR013263; TopoI_Znr_bac.
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; PF21372; TOP1_ZnF; 1.
DR Pfam; PF08272; Topo_Zn_Ribbon; 2.
DR Pfam; PF01131; Topoisom_bac; 1.
DR Pfam; PF01751; Toprim; 1.
DR Pfam; PF01396; zf-C4_Topoisom; 2.
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; 4.
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 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..142
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 37..64
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 192..197
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT ACT_SITE 319
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 168
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 169
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 172
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 177
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 184
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 321
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
FT SITE 507
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00952"
SQ SEQUENCE 865 AA; 97309 MW; A789125D47B7C984 CRC64;
MAKALVIVES PAKAKTINKY LGNDYVVKSS VGHIRDLPTS GTVSQKSSSS STDKNKKKVK
KDEKTALISR MGVDPYHGWE ANYQILPGKE KVVSELKVLA DKADHIFLAT DLDREGEAIA
WHLREVIGGD DSRFSRVVFN EITKNAITQA FDKPGELNID RVNAQQARRF MDRVVGYMVS
PLLWKKIARG LSAGRVQSVA VRLVVERERE IKAFVPEEYW QLHADLMAKG DTALHMEVTH
EKGKPFKPVN AQQTQSAVSL LENAKYTVID REDRPTSSKP GAPFITSTLQ QAASTRLGFG
VKKTMMMAQR LYEAGHITYM RTDSTNLSQE ALEMVRGYID NQFGEKYLPK SANVYSSKDN
SQEAHEAIRP SNVDVMAEEL KDMEADAQKL YQLIWRQFIA CQMTPAKYDS TTLSVKAGDF
ELRAKGRTLR FDGWTKVMPT LRKGDEDNTL PVIDVGTVFD LQQLIPSQHF TKPPARFSEA
SLVKELEKRG IGRPSTYASI ISTIQDRGYV RAENRRFYAE KMGEIVNDRL EENFNELMSY
DFTARMEDQL DHVAKNQANW KDVLDEFFFN FSEQLDVASK DPDEGGMRPN AMVITSIECP
TCHRAMGIRT ATTGVFLGCS GYALSPKERC KQTINLIPEN EILNILEGDD AETNALRARR
RCKKCGTAMD SYLIDNQRKL HVCGNNPACD GYEVEAGEFR IKGYDGPIVE CDKCGSEMHL
KVGRFGKYMG CTNEECKNTR KILRSGEVAP PKEDPVPLPE LACEKSDAYF VLRDGAAGVF
LAANTFPKSR ETRAPLVEEL VRFKDRLPEK FRYLAEAPVT DPEGNKTIVR FSRKTKQQYV
SSEKKGKATG WTAFFADGAW DVKEK
//
