ID GYRB_THEMA Reviewed; 636 AA.
AC P77993;
DT 30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT 30-MAY-2000, sequence version 2.
DT 27-MAR-2024, entry version 160.
DE RecName: Full=DNA gyrase subunit B {ECO:0000255|HAMAP-Rule:MF_01898};
DE EC=5.6.2.2 {ECO:0000255|HAMAP-Rule:MF_01898};
GN Name=gyrB {ECO:0000255|HAMAP-Rule:MF_01898}; Synonyms=top2B;
GN OrderedLocusNames=TM_0833;
OS Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826
OS / MSB8).
OC Bacteria; Thermotogota; Thermotogae; Thermotogales; Thermotogaceae;
OC Thermotoga.
OX NCBI_TaxID=243274;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8;
RX PubMed=8863738; DOI=10.1016/0378-1119(96)00508-2;
RA Guipaud O., Labedan B., Forterre P.;
RT "A gyrB-like gene from the hyperthermophilic bacterion Thermotoga
RT maritima.";
RL Gene 174:121-128(1996).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8;
RX PubMed=10360571; DOI=10.1038/20601;
RA Nelson K.E., Clayton R.A., Gill S.R., Gwinn M.L., Dodson R.J., Haft D.H.,
RA Hickey E.K., Peterson J.D., Nelson W.C., Ketchum K.A., McDonald L.A.,
RA Utterback T.R., Malek J.A., Linher K.D., Garrett M.M., Stewart A.M.,
RA Cotton M.D., Pratt M.S., Phillips C.A., Richardson D.L., Heidelberg J.F.,
RA Sutton G.G., Fleischmann R.D., Eisen J.A., White O., Salzberg S.L.,
RA Smith H.O., Venter J.C., Fraser C.M.;
RT "Evidence for lateral gene transfer between Archaea and Bacteria from
RT genome sequence of Thermotoga maritima.";
RL Nature 399:323-329(1999).
CC -!- FUNCTION: A type II topoisomerase that negatively supercoils closed
CC circular double-stranded (ds) DNA in an ATP-dependent manner to
CC modulate DNA topology and maintain chromosomes in an underwound state.
CC Negative supercoiling favors strand separation, and DNA replication,
CC transcription, recombination and repair, all of which involve strand
CC separation. Also able to catalyze the interconversion of other
CC topological isomers of dsDNA rings, including catenanes and knotted
CC rings. Type II topoisomerases break and join 2 DNA strands
CC simultaneously in an ATP-dependent manner. {ECO:0000255|HAMAP-
CC Rule:MF_01898}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP-dependent breakage, passage and rejoining of double-
CC stranded DNA.; EC=5.6.2.2; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_01898};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01898};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01898};
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01898};
CC Note=Binds two Mg(2+) per subunit. The magnesium ions form salt bridges
CC with both the protein and the DNA. Can also accept other divalent metal
CC cations, such as Mn(2+) or Ca(2+). {ECO:0000255|HAMAP-Rule:MF_01898};
CC -!- SUBUNIT: Heterotetramer, composed of two GyrA and two GyrB chains. In
CC the heterotetramer, GyrA contains the active site tyrosine that forms a
CC transient covalent intermediate with DNA, while GyrB binds cofactors
CC and catalyzes ATP hydrolysis. {ECO:0000255|HAMAP-Rule:MF_01898}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01898}.
CC -!- MISCELLANEOUS: Few gyrases are as efficient as E.coli at forming
CC negative supercoils. Not all organisms have 2 type II topoisomerases;
CC in organisms with a single type II topoisomerase this enzyme also has
CC to decatenate newly replicated chromosomes. {ECO:0000255|HAMAP-
CC Rule:MF_01898}.
CC -!- SIMILARITY: Belongs to the type II topoisomerase GyrB family.
CC {ECO:0000255|HAMAP-Rule:MF_01898}.
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DR EMBL; U49692; AAC44498.1; -; Genomic_DNA.
DR EMBL; AE000512; AAD35915.1; -; Genomic_DNA.
DR PIR; JC4960; JC4960.
DR RefSeq; NP_228642.1; NC_000853.1.
DR RefSeq; WP_004080806.1; NZ_CP011107.1.
DR AlphaFoldDB; P77993; -.
DR SMR; P77993; -.
DR STRING; 243274.TM_0833; -.
DR PaxDb; 243274-THEMA_00475; -.
DR DNASU; 898504; -.
DR EnsemblBacteria; AAD35915; AAD35915; TM_0833.
DR KEGG; tma:TM0833; -.
DR eggNOG; COG0187; Bacteria.
DR InParanoid; P77993; -.
DR OrthoDB; 9802808at2; -.
DR BRENDA; 5.99.1.3; 6331.
DR Proteomes; UP000008183; Chromosome.
DR GO; GO:0005694; C:chromosome; IEA:InterPro.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR GO; GO:0003918; F:DNA topoisomerase type II (double strand cut, ATP-hydrolyzing) 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 GO; GO:0006261; P:DNA-templated DNA replication; IEA:UniProtKB-UniRule.
DR CDD; cd16928; HATPase_GyrB-like; 1.
DR CDD; cd00822; TopoII_Trans_DNA_gyrase; 1.
DR CDD; cd03366; TOPRIM_TopoIIA_GyrB; 1.
DR Gene3D; 3.30.230.10; -; 1.
DR Gene3D; 3.40.50.670; -; 1.
DR Gene3D; 3.30.565.10; Histidine kinase-like ATPase, C-terminal domain; 1.
DR HAMAP; MF_01898; GyrB; 1.
DR InterPro; IPR002288; DNA_gyrase_B_C.
DR InterPro; IPR011557; GyrB.
DR InterPro; IPR003594; HATPase_C.
DR InterPro; IPR036890; HATPase_C_sf.
DR InterPro; IPR020568; Ribosomal_Su5_D2-typ_SF.
DR InterPro; IPR014721; Ribsml_uS5_D2-typ_fold_subgr.
DR InterPro; IPR001241; Topo_IIA.
DR InterPro; IPR013760; Topo_IIA-like_dom_sf.
DR InterPro; IPR000565; Topo_IIA_B.
DR InterPro; IPR013759; Topo_IIA_B_C.
DR InterPro; IPR013506; Topo_IIA_bsu_dom2.
DR InterPro; IPR018522; TopoIIA_CS.
DR InterPro; IPR006171; TOPRIM_domain.
DR InterPro; IPR034160; TOPRIM_GyrB.
DR NCBIfam; TIGR01059; gyrB; 1.
DR PANTHER; PTHR45866:SF1; DNA GYRASE SUBUNIT B, MITOCHONDRIAL; 1.
DR PANTHER; PTHR45866; DNA GYRASE/TOPOISOMERASE SUBUNIT B; 1.
DR Pfam; PF00204; DNA_gyraseB; 1.
DR Pfam; PF00986; DNA_gyraseB_C; 1.
DR Pfam; PF02518; HATPase_c; 1.
DR Pfam; PF01751; Toprim; 1.
DR PRINTS; PR01159; DNAGYRASEB.
DR PRINTS; PR00418; TPI2FAMILY.
DR SMART; SM00387; HATPase_c; 1.
DR SMART; SM00433; TOP2c; 1.
DR SUPFAM; SSF55874; ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase; 1.
DR SUPFAM; SSF54211; Ribosomal protein S5 domain 2-like; 1.
DR SUPFAM; SSF56719; Type II DNA topoisomerase; 1.
DR PROSITE; PS00177; TOPOISOMERASE_II; 1.
DR PROSITE; PS50880; TOPRIM; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cytoplasm; DNA-binding; Isomerase; Magnesium; Metal-binding;
KW Nucleotide-binding; Reference proteome; Topoisomerase.
FT CHAIN 1..636
FT /note="DNA gyrase subunit B"
FT /id="PRO_0000145355"
FT DOMAIN 421..535
FT /note="Toprim"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT BINDING 427
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT BINDING 500
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT BINDING 500
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT BINDING 502
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT SITE 452
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT SITE 455
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT CONFLICT 152
FT /note="V -> M (in Ref. 1; AAC44498)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 636 AA; 72428 MW; B21E0E0CBEC6F89E CRC64;
MEKYSAESIK VLKGLEPVRM RPGMYIGSTG KRGLHHLVYE VVDNSVDEAL AGYCDWIRVT
LHEDGSVEVE DNGRGIPVDI HPEEGRSALE VVFTVLHAGG KFSKDSYKIS GGLHGVGVSV
VNALSEWLEV RVHRDGKIYR QRYERGKPVT PVEVIGETDK HGTIVRFKPD PLIFSETEFD
PDILEHRLRE IAFLVPGLKI EFEDRINGEK KTFKFDGGIV EYVKYLNRGK KALHDVIHIK
RTEKVKTKNG EDEVIVEIAF QYTDSYSEDI VSFANTIKTV DGGTHVTAFK STLTRLMNEY
GKKHNFLKKD DSFQGEDVRE GLTAVISVYV KNPEFEGQTK SKLGNEEVKE AVTKAMREEL
KKIFDANPEL VKTILSKIMS TKQAREAAKR AREMVRRKNV LQNTTLPGKL ADCSSTHREK
TELFIVEGDS AGGSAKQARD REFQAVLPIR GKILNVEKSS LDRLLKNEQI SDIIVAVGTG
IGDDFDESKL RYGRIIIMTD ADIDGAHIRT LLLTLFYRYM RPLIEQGRVY IALPPLYRIK
AGREEFYVYS DQELAEYKEK LQGKRIEIQR YKGLGEMNPE QLWETTMNPE TRKIIRVTIE
DAEEADRLFE ILMGNDPSSR REFIERHALK VKELDI
//
