TOP3_BACCZ
ID TOP3_BACCZ Reviewed; 729 AA.
AC Q63GK5;
DT 01-MAY-2007, integrated into UniProtKB/Swiss-Prot.
DT 25-OCT-2004, sequence version 1.
DT 03-AUG-2022, entry version 102.
DE RecName: Full=DNA topoisomerase 3 {ECO:0000255|HAMAP-Rule:MF_00953};
DE EC=5.6.2.1 {ECO:0000255|HAMAP-Rule:MF_00953};
DE AltName: Full=DNA topoisomerase III {ECO:0000255|HAMAP-Rule:MF_00953};
GN Name=topB {ECO:0000255|HAMAP-Rule:MF_00953}; OrderedLocusNames=BCE33L0347;
OS Bacillus cereus (strain ZK / E33L).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC Bacillus cereus group.
OX NCBI_TaxID=288681;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ZK / E33L;
RX PubMed=16621833; DOI=10.1128/jb.188.9.3382-3390.2006;
RA Han C.S., Xie G., Challacombe J.F., Altherr M.R., Bhotika S.S., Bruce D.,
RA Campbell C.S., Campbell M.L., Chen J., Chertkov O., Cleland C.,
RA Dimitrijevic M., Doggett N.A., Fawcett J.J., Glavina T., Goodwin L.A.,
RA Hill K.K., Hitchcock P., Jackson P.J., Keim P., Kewalramani A.R.,
RA Longmire J., Lucas S., Malfatti S., McMurry K., Meincke L.J., Misra M.,
RA Moseman B.L., Mundt M., Munk A.C., Okinaka R.T., Parson-Quintana B.,
RA Reilly L.P., Richardson P., Robinson D.L., Rubin E., Saunders E., Tapia R.,
RA Tesmer J.G., Thayer N., Thompson L.S., Tice H., Ticknor L.O., Wills P.L.,
RA Brettin T.S., Gilna P.;
RT "Pathogenomic sequence analysis of Bacillus cereus and Bacillus
RT thuringiensis isolates closely related to Bacillus anthracis.";
RL J. Bacteriol. 188:3382-3390(2006).
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:0000255|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; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_00953};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00953};
CC -!- SIMILARITY: Belongs to the type IA topoisomerase family.
CC {ECO:0000255|HAMAP-Rule:MF_00953}.
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DR EMBL; CP000001; AAU19892.1; -; Genomic_DNA.
DR RefSeq; WP_001140208.1; NZ_CP009968.1.
DR AlphaFoldDB; Q63GK5; -.
DR SMR; Q63GK5; -.
DR EnsemblBacteria; AAU19892; AAU19892; BCE33L0347.
DR KEGG; bcz:BCE33L0347; -.
DR PATRIC; fig|288681.22.peg.5256; -.
DR OMA; TYPRVDT; -.
DR Proteomes; UP000002612; Chromosome.
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; 1.10.290.10; -; 1.
DR Gene3D; 1.10.460.10; -; 1.
DR Gene3D; 2.70.20.10; -; 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 PANTHER; PTHR11390; PTHR11390; 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; SSF56712; 1.
DR TIGRFAMs; TIGR01056; topB; 1.
DR PROSITE; PS00396; TOPOISOMERASE_I_PROK; 1.
DR PROSITE; PS50880; TOPRIM; 1.
PE 3: Inferred from homology;
KW DNA-binding; Isomerase; Magnesium; Metal-binding; Topoisomerase.
FT CHAIN 1..729
FT /note="DNA topoisomerase 3"
FT /id="PRO_0000286362"
FT DOMAIN 3..136
FT /note="Toprim"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT REGION 187..192
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT REGION 686..718
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 310
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT BINDING 9
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT BINDING 105
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT SITE 61
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT SITE 168
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT SITE 176
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
FT SITE 312
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00953"
SQ SEQUENCE 729 AA; 82840 MW; A7AD741BBD75CC1D CRC64;
MAKSVVIAEK PSVARDIARV LKCDKKGNGY LEGSKYIVTW ALGHLVTLAD PESYDVKYKK
WNLEDLPMLP ERLKLTVIKQ TGKQFNAVKS QLLRKDVNEI IVATDAGREG ELVARWIIDK
VRINKPIKRL WISSVTDKAI KDGFANLKPG KAYDNLYASA VARSEADWYI GLNATRALTT
RFNAQLNCGR VQTPTVAMIA NREDEIKNFK AQTYYGIEAQ TTNQLKLTWQ DANGNSRSFN
KEKIDGIVKG LDKHNATVLE IDKKQKKSFS PGLYDLTELQ RDANKKFGYS AKETLNIMQK
LYEQHKVLTY PRTDSRYISS DIVGTLPERL KACGVGEYRP LAHKVLQKPI KANKSFVDDS
KVSDHHAIIP TEGYVNFSAF TDKERKIYDL VVKRFLAVLF PAFEYEQLTL RTKIGNETFI
ARGKTILHAG WKEVYENRFE DDDVTDEVKE QLLPRIEKGD TLTVKLIMQT SGQTKAPARF
NEATLLSAME NPTKYMDTQN KQLADTLKST GGLGTVATRA DIIDKLFNSF LIEKRGKDIH
ITSKGRQLLD LVPEELKSPT LTGEWEQKLE AIAKGKLKKE VFISEMKNYT KEIVSEIKSS
DKKYKHDNIS TKSCPDCGKP MLEVNGKKGK MLVCQDRECG HRKNVSRTTN ARCPQCKKKL
ELRGEGAGQI FACKCGYREK LSTFQERRKK ESGNKADKRD VQKYMKQQKK EEEPLNNPFA
EALKKLKFD
