ID H2FYX4_OCESG Unreviewed; 805 AA.
AC H2FYX4;
DT 21-MAR-2012, integrated into UniProtKB/TrEMBL.
DT 21-MAR-2012, sequence version 1.
DT 27-MAR-2024, entry version 78.
DE RecName: Full=DNA gyrase subunit B {ECO:0000256|ARBA:ARBA00019166, ECO:0000256|HAMAP-Rule:MF_01898};
DE EC=5.6.2.2 {ECO:0000256|ARBA:ARBA00012895, ECO:0000256|HAMAP-Rule:MF_01898};
GN Name=gyrB {ECO:0000256|HAMAP-Rule:MF_01898,
GN ECO:0000313|EMBL:AEY00139.1};
GN OrderedLocusNames=GU3_01910 {ECO:0000313|EMBL:AEY00139.1};
OS Oceanimonas sp. (strain GK1 / IBRC-M 10197).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Aeromonadales;
OC Aeromonadaceae; Oceanimonas.
OX NCBI_TaxID=511062 {ECO:0000313|EMBL:AEY00139.1, ECO:0000313|Proteomes:UP000007742};
RN [1] {ECO:0000313|EMBL:AEY00139.1, ECO:0000313|Proteomes:UP000007742}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=GK1 {ECO:0000313|EMBL:AEY00139.1,
RC ECO:0000313|Proteomes:UP000007742};
RX PubMed=22461556; DOI=10.1128/JB.00023-12;
RA Parsa Yeganeh L., Azarbaijani R., Sarikhan S., Mousavi H., Ramezani M.,
RA Amoozegar M.A., Shahzadeh Fazeli A., Salekdeh G.H.;
RT "Complete genome sequence of Oceanimonas sp. GK1, a halotolerant bacterium
RT from Gavkhouni Wetland in Iran.";
RL J. Bacteriol. 194:2123-2124(2012).
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 ---------------------------------------------------------------------------
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; CP003171; AEY00139.1; -; Genomic_DNA.
DR RefSeq; WP_014290875.1; NC_016745.1.
DR AlphaFoldDB; H2FYX4; -.
DR STRING; 511062.GU3_01910; -.
DR KEGG; oce:GU3_01910; -.
DR eggNOG; COG0187; Bacteria.
DR HOGENOM; CLU_006146_4_1_6; -.
DR OrthoDB; 9802808at2; -.
DR Proteomes; UP000007742; 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; 3.10.20.690; -; 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; IPR041423; GyrB_insert.
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; PF18053; GyrB_insert; 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}; Reference proteome {ECO:0000313|Proteomes:UP000007742};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_01898}.
FT DOMAIN 419..534
FT /note="Toprim"
FT /evidence="ECO:0000259|PROSITE:PS50880"
FT BINDING 425
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 499
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 499
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT BINDING 501
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT SITE 450
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT SITE 453
FT /note="Interaction with DNA"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
SQ SEQUENCE 805 AA; 89891 MW; 4A2AE10E5A74AE82 CRC64;
MSEHTYDSSS IKVLKGLDAV RKRPGMYIGD TDDGTGLHHM VFEVVDNSID EALAGHCKDI
VVTIHADGSV SVSDDGRGIP VDIHEEEGRS AAEVILTVLH AGGKFDDNSY KVSGGLHGVG
VSVVNALSEK LQLTIWRSGK VHEQTYRHGE PQAPLTAVGD TSRSGTQIRF WPSHETFTDT
NFHYDILAKR LRELSFLNSG VSIKLLDERD GKEVHFQYEG GIQAFVEYLN RNKTPIHPKA
FHFSTEREDG IAVEVSMQWN DSYQENIFCF TNNIPQRDGG THLAGFRAAL TRTLNGYMDK
EGFSKKAKTS ASGDDAREGL TAVISVKVPD PKFSSQTKDK LVSSEVKTAV EQTMAERLQE
FLLENPNDAK IVVNKIIDAA RAREAARKAR EMTRRKGALD LAGLPGKLAD CQEKDPALSE
LYIVEGDSAG GSAKQGRNRK YQAILPLKGK ILNVEKARFD KMLSSQEVAT LITALGCGIG
RDEYNPDKMR YHHIIIMTDA DVDGAHIRTL LLTFFYRQMP EIIERGYVYI AQPPLYKVKK
GKQEQYLKDE PAMLQYQTSL ALDGATLHVN ESAPAIGGEQ LEKLVNDYRK VQELIARLSR
RAPEVVLNEL IYQPELSLEA LTDEARVNAW LAAINESLED SNTNGTQYLL DAVFSEERNC
HLPRVKVRQH GMEREFPISY DFFASGEYRS IVDLGKGIAN LIEEGGYVKR GEKTKAVDSF
AEALDWLMNE SKRGLYVQRY KGLGEMNPDQ LWETTMDPGT RRMLRVTIED AVAADQLFST
LMGDHVEPRR DFIETNALKV ANLDI
//
