ID A0A372LNX0_9BACI Unreviewed; 730 AA.
AC A0A372LNX0;
DT 07-NOV-2018, integrated into UniProtKB/TrEMBL.
DT 07-NOV-2018, sequence version 1.
DT 24-JAN-2024, entry version 22.
DE RecName: Full=DNA topoisomerase 3 {ECO:0000256|HAMAP-Rule:MF_00953};
DE EC=5.6.2.1 {ECO:0000256|HAMAP-Rule:MF_00953};
DE AltName: Full=DNA topoisomerase III {ECO:0000256|HAMAP-Rule:MF_00953};
GN Name=topB {ECO:0000256|HAMAP-Rule:MF_00953};
GN ORFNames=D0469_10370 {ECO:0000313|EMBL:RFU69148.1};
OS Peribacillus saganii.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Peribacillus.
OX NCBI_TaxID=2303992 {ECO:0000313|EMBL:RFU69148.1, ECO:0000313|Proteomes:UP000264541};
RN [1] {ECO:0000313|EMBL:RFU69148.1, ECO:0000313|Proteomes:UP000264541}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=V47-23a {ECO:0000313|EMBL:RFU69148.1,
RC ECO:0000313|Proteomes:UP000264541};
RA Seuylemezian A., Vaishampayan P.;
RT "Bacillus chawlae sp. nov., Bacillus glennii sp. nov., and Bacillus saganii
RT sp. nov. Isolated from the Vehicle Assembly Building at Kennedy Space
RT Center where the Viking Spacecraft were Assembled.";
RL Submitted (AUG-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_00953}.
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_00953};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00953};
CC -!- SIMILARITY: Belongs to the type IA topoisomerase family.
CC {ECO:0000256|ARBA:ARBA00009446, ECO:0000256|HAMAP-Rule:MF_00953}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00953}.
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:RFU69148.1}.
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DR EMBL; QVTE01000029; RFU69148.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A372LNX0; -.
DR OrthoDB; 9803554at2; -.
DR Proteomes; UP000264541; 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:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0006265; P:DNA topological change; IEA:UniProtKB-UniRule.
DR CDD; cd00186; TOP1Ac; 1.
DR CDD; cd03362; TOPRIM_TopoIA_TopoIII; 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_00953; Topoisom_3_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; IPR005738; TopoIII.
DR InterPro; IPR006171; TOPRIM_domain.
DR InterPro; IPR034144; TOPRIM_TopoIII.
DR NCBIfam; TIGR01056; topB; 1.
DR PANTHER; PTHR11390:SF21; DNA TOPOISOMERASE 3-ALPHA; 1.
DR PANTHER; PTHR11390; PROKARYOTIC DNA TOPOISOMERASE; 1.
DR Pfam; PF01131; Topoisom_bac; 1.
DR Pfam; PF01751; Toprim; 1.
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_00953};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_00953};
KW Magnesium {ECO:0000256|HAMAP-Rule:MF_00953};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_00953};
KW Reference proteome {ECO:0000313|Proteomes:UP000264541};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_00953}.
FT DOMAIN 3..136
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT REGION 187..192
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT REGION 687..710
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 311
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT BINDING 9
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT BINDING 105
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT SITE 61
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT SITE 168
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT SITE 176
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
FT SITE 313
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
SQ SEQUENCE 730 AA; 82465 MW; BEAE1AA0FB344EB1 CRC64;
MSKILVLAEK PSVGRDIAKV LNCNKKGNGY FEGDKYIVTW ALGHLVTLAD PEAYDDKYKS
WKLEDLPMLP RELKLVVIKQ TGKQFQAVKA QLSRKDVGSI VIATDAGREG ELVARWILEK
ANVKKPVKRL WISSVTDKAI KEGFSKLRDG REYENLYASA VARAEADWIV GMNATRALTS
KYNAQLSAGR VQTPALAMIA KREEEIKSFK PMDYFGVTAL SDTKLKLTWR DSKTNDIRTF
DKSGAERIAD SVKRKSAEVV EVDRTRKKSY APGLYDLTEL QRDANKLFGY SAKETLSIMQ
RLYESHKVLT YPRTDSRYLS SDLVDTLKER LQAISVKPYS PYAAKILRAP IKTNKSFVDD
KKVSDHHAII PTEQSPFISK FSDKEWKIYD LVVKRFLAVL YPPFEYEQTT IKAKIADEHF
VAKGKVVIHS GWKEIYDNHY DEEESRDGLS EQLLPSVKKG DSIPISAVNV TNGETKPPEP
FNEGTLLSAM ENPSRFMNLE NKDLVKTLGE TGGIGTVATR ADIIEKLFNS FLIEKKGKGI
FITSKGKQLL ELVPEELQSP ALTAEWEQKL TAISKGKLQK NAFILDMRNY AKDVVTEIKN
SGKKFKHDNV TGTKCPECGK LMLEVNGKRG KMHVCQDREC GHRKNISRST NARCPNCHKK
LELRGEGEGQ IFVCKCGHRE KLSSFTNRKQ KGKNHQASKR DVSQYLKQQN KDEPINTAFA
DALSKLKFDK
//
