ID F7QIB4_9BRAD Unreviewed; 814 AA.
AC F7QIB4;
DT 21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT 21-SEP-2011, sequence version 1.
DT 24-JAN-2024, entry version 76.
DE RecName: Full=DNA gyrase subunit B {ECO:0000256|HAMAP-Rule:MF_01898};
DE EC=5.6.2.2 {ECO:0000256|HAMAP-Rule:MF_01898};
GN Name=gyrB {ECO:0000256|HAMAP-Rule:MF_01898};
GN ORFNames=CSIRO_1166 {ECO:0000313|EMBL:EGP09005.1};
OS Bradyrhizobiaceae bacterium SG-6C.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC Nitrobacteraceae.
OX NCBI_TaxID=709797 {ECO:0000313|EMBL:EGP09005.1, ECO:0000313|Proteomes:UP000003148};
RN [1] {ECO:0000313|EMBL:EGP09005.1, ECO:0000313|Proteomes:UP000003148}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=SG-6C {ECO:0000313|EMBL:EGP09005.1,
RC ECO:0000313|Proteomes:UP000003148};
RX PubMed=21742875; DOI=10.1128/JB.05647-11;
RA Pearce S.L., Pandey R., Dorrian S.J., Russell R.J., Oakeshott J.G.,
RA Pandey G.;
RT "Genome Sequence of the Newly Isolated Chemolithoautotrophic
RT Bradyrhizobiaceae Strain SG-6C.";
RL J. Bacteriol. 193:5057-5057(2011).
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:0000256|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:0000256|ARBA:ARBA00000185,
CC ECO:0000256|HAMAP-Rule:MF_01898};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01898};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_01898};
CC Name=Ca(2+); Xref=ChEBI:CHEBI:29108;
CC Evidence={ECO:0000256|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:0000256|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:0000256|HAMAP-Rule:MF_01898}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|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:0000256|HAMAP-
CC Rule:MF_01898}.
CC -!- SIMILARITY: Belongs to the type II topoisomerase GyrB family.
CC {ECO:0000256|ARBA:ARBA00010708, ECO:0000256|HAMAP-Rule:MF_01898}.
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:EGP09005.1}.
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; AFOF01000015; EGP09005.1; -; Genomic_DNA.
DR AlphaFoldDB; F7QIB4; -.
DR STRING; 709797.CSIRO_1166; -.
DR eggNOG; COG0187; Bacteria.
DR HOGENOM; CLU_006146_4_1_5; -.
DR Proteomes; UP000003148; 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; -; 2.
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; IPR049353; GyrB_hook.
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; PF21249; GyrB_hook; 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 {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_01898};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01898};
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01898};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_01898};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_01898};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_01898};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_01898}.
FT DOMAIN 434..549
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT BINDING 440
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT BINDING 514
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT BINDING 514
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT BINDING 516
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT SITE 465
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT SITE 468
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
SQ SEQUENCE 814 AA; 89588 MW; FEAD34093B89ACAD CRC64;
MTEPARQTSA EPVANPGAEY GAESIRVLKG LDAVRKRPGM YIGDTDDGSG LHHMVYEVVD
NAIDEALAGH ATRVEVILNP DNSVTVRDDG RGIPTDIHKG EGISAAEVIM TQLHAGGKFD
QNSYKVSGGL HGVGVSVVNA LSSKLELRIW RAGKEHYIAF AHGDSVAPLK VVGDAPEGKR
GTEVTFLASS DTFKNIEYDF ATLEHRLREL AFLNSGVNIT LSDMRHAVEK REELFYEGGV
EEFVKYLDRN KKPVVPTPIV MRAEQNGISV EVAMWWNDSY HENVLCFTNN IPQRDGGTHL
AGFRGALTRQ VTGYADAMAK KEKIALTGDD CREGLTAVLS VKVPDPKFSS QTKDKLVSSE
VRPVVENVLN EALAAWFEEH PSEAKIIVGK VVEAAAAREA ARKARELTRR KGALDIASLP
GKLADCQERD PAKSELFIVE GDSAGGSAKQ GRNREFQAVL PLRGKILNVE RARFDKMLSS
EQVGTLITAL GTGIGRDDFD ISKLRYHKII IMTDADVDGA HIRTLLLTFF FRQMPALIEG
GFLYIAQPPL FKVTRGKSEQ YLKDERAMED YLIDTGLDDC VLKLSSGEDR KGRDLQALVE
DARVIRGILN SLHSRYNRSV VEQAAIAGVL SPHVVGNVDT ANQAADYIAK RLDALADEVE
RGWTGAFREG EGYFFERTVR GVKDVAIIDD ALLGSAEARK LDEYAGRLQE AYPRSSVLRR
KDTETPIHGP VSLFEAVTEA GRKGVTYQRY KGLGEMNPQQ LWETTLDVNA RSLLQVKVKE
VDAADDIFTK LMGDVVEPRR EFIQDNSLDA NVDV
//
