ID A0A087N1M7_9BACI Unreviewed; 725 AA.
AC A0A087N1M7;
DT 29-OCT-2014, integrated into UniProtKB/TrEMBL.
DT 29-OCT-2014, sequence version 1.
DT 24-JAN-2024, entry version 39.
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=CH76_08855 {ECO:0000313|EMBL:KFL43030.1};
OS Lysinibacillus sp. BF-4.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Lysinibacillus.
OX NCBI_TaxID=1473546 {ECO:0000313|EMBL:KFL43030.1, ECO:0000313|Proteomes:UP000029097};
RN [1] {ECO:0000313|EMBL:KFL43030.1, ECO:0000313|Proteomes:UP000029097}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=BF-4 {ECO:0000313|EMBL:KFL43030.1,
RC ECO:0000313|Proteomes:UP000029097};
RA Antwerpen M.H., Georgi E., Zimmermann P., Hoermansdorfer S., Meyer H.,
RA Grass G.;
RT "Genome sequence of strain, BF-4, a Lysinibacillus-like bacillus isolated
RT during an anthrax outbreak in Bavaria.";
RL Submitted (MAR-2014) 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:KFL43030.1}.
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DR EMBL; JPUW01000024; KFL43030.1; -; Genomic_DNA.
DR RefSeq; WP_036145124.1; NZ_JPUW01000024.1.
DR AlphaFoldDB; A0A087N1M7; -.
DR eggNOG; COG0550; Bacteria.
DR eggNOG; COG0551; Bacteria.
DR OrthoDB; 9803554at2; -.
DR Proteomes; UP000029097; 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:UP000029097};
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 ACT_SITE 310
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 312
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00953"
SQ SEQUENCE 725 AA; 81885 MW; 0479DB1B0E9635B3 CRC64;
MAKKVVIAEK PSVARDIARV LNCSKKGNGY LEGNEYIVTW ALGHLVTLAD PEAYDQKYKT
WNLEDLPMLP NDLKTTVIRQ TTKQYNAVKS QLVRKDVNEI IIATDAGREG ELVARWIIDK
ARVNKPTKRL WISSVTDKAI KQGFASLKPG KAYENLYDAA VARSEADWYV GLNATRALTT
KHNAQLSAGR VQTPTVAIIA AREQEIMTFK PKTFYGIEAK TPTVKLTWQD SQTKDTKTFD
RAKTEAVMKK INNQQAVITQ LDIKQKKAYA PGLYDLTELQ RDANKIFGYS AKETLNIMQK
LYEQHKVLTY PRTDSRYLSS DIVATLPERI KSCGVGEYRT LANKVLTKPI KANKSFVDDS
KVSDHHAIIP TEEYVNQSAF NDKERKIYDL VVKRFLAVLY PPHEYEQLTI HAAIADENFI
ARGKTVTVQG FKEVYNHAEE DDSDVKEQLL PKLAKGDKLD VTVVHETTGQ TKAPARFNEA
TLLSAMENPT RYLQASDKQL AATLKSTGGL GTVATRADII EKLFNSFLIE KRGGKEIYVT
SKGKQLLDLV PEGLRSPELT GEWELKLEQI AQGKLKKADF IAEMKQYTKE IVREIKADDT
KFKHDNISTK SCPDCGKPML EVNGKRGKML VCQDRECGHR KNVSRTTNAR CPECKKKLEL
RGEGDGQIFT CRCGYREKMS SFQKRRQQNN KGKVSKHEVQ KFMKQQDEEP VNDALANALK
GLKFD
//
