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Entry: U5C2H8_9BACT
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ID   U5C2H8_9BACT            Unreviewed;       652 AA.
AC   U5C2H8;
DT   11-DEC-2013, integrated into UniProtKB/TrEMBL.
DT   11-DEC-2013, sequence version 1.
DT   24-JAN-2024, entry version 51.
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=P872_18340 {ECO:0000313|EMBL:ERM82357.1};
OS   Rhodonellum psychrophilum GCM71 = DSM 17998.
OC   Bacteria; Bacteroidota; Cytophagia; Cytophagales; Cytophagaceae;
OC   Rhodonellum.
OX   NCBI_TaxID=1123057 {ECO:0000313|EMBL:ERM82357.1, ECO:0000313|Proteomes:UP000016843};
RN   [1] {ECO:0000313|EMBL:ERM82357.1, ECO:0000313|Proteomes:UP000016843}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=GCM71 {ECO:0000313|EMBL:ERM82357.1,
RC   ECO:0000313|Proteomes:UP000016843};
RX   PubMed=24309741;
RA   Hauptmann A.L., Glaring M.A., Hallin P.F., Prieme A., Stougaard P.;
RT   "Draft Genome Sequence of the Psychrophilic and Alkaliphilic Rhodonellum
RT   psychrophilum Strain GCM71T.";
RL   Genome Announc. 1:e01014-13(2013).
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:ERM82357.1}.
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DR   EMBL; AWXR01000028; ERM82357.1; -; Genomic_DNA.
DR   RefSeq; WP_019598729.1; NZ_KB906682.1.
DR   AlphaFoldDB; U5C2H8; -.
DR   PATRIC; fig|1123057.7.peg.2734; -.
DR   eggNOG; COG0187; Bacteria.
DR   OrthoDB; 9802808at2; -.
DR   Proteomes; UP000016843; Unassembled WGS sequence.
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 {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW   Rule:MF_01898}; Cytoplasm {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:UP000016843};
KW   Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW   Rule:MF_01898}.
FT   DOMAIN          429..548
FT                   /note="Toprim"
FT                   /evidence="ECO:0000259|PROSITE:PS50880"
FT   BINDING         435
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         513
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   BINDING         513
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         515
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   SITE            460
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   SITE            463
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
SQ   SEQUENCE   652 AA;  73066 MW;  6BCB408316FCF543 CRC64;
     MSEKKEVDLK NYSAVNIQVL EGLEAVRKRP AMYIGDIGTR GLHHLIWEVV DNSIDEALAG
     HCDTIYVTIH EDNSVTVSDN GRGIPIDMHE KEQKSALEVV MTVLHAGGKF DKDTYKVSGG
     LHGVGVSCVN ALSTTLRATV HRDGKVYEQE YAIGIPQYDV REIGTTDKRG TTIFFRPDAS
     IFTHTEFKYE TIANRMREMS FLNAGIRIYL SDMRDLEDDG KPKSDEFYSE GGLVEFVQYL
     DETKEKIISE PIYIESEKNG VPVQVAMSYN SSYSENVVSY VNTINTYEGG THVSGFRRAL
     TRTLKSYADK SGMLDKLKLE VSGDDFREGL TAVISVKVQE PQFEGQTKTK LGNSDVVGAV
     DSSVSETLQV WLEEHPKEAK IIVGKVILAA QARHAARKAR EMVQRKNVLG GGGLPGKLAD
     CANSDPAVCE LYLVEGDSAG GSAKQGRERD FQAILPLKGK ILNVEKAHEH KIYDNEEIKN
     ILTALGVKFG TAHDDKELDL SHLRYHKIII MTDADIDGSH IRTLILTLFF RYMRALIEKG
     YVYIAQPPLY LLKKGKDERY CWTEAERKIL MREMAGEGKE DSINIQRYKG LGEMNPEQLW
     STTMDPNTRT LKLVQIESAA EADHLFSMLM GDEVPPRRDF IEKNAKYAKI DI
//
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