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Database: UniProt
Entry: D4M1B4_9FIRM
LinkDB: D4M1B4_9FIRM
Original site: D4M1B4_9FIRM 
ID   D4M1B4_9FIRM            Unreviewed;       644 AA.
AC   D4M1B4;
DT   18-MAY-2010, integrated into UniProtKB/TrEMBL.
DT   18-MAY-2010, sequence version 1.
DT   24-JAN-2024, entry version 78.
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=RTO_02430 {ECO:0000313|EMBL:CBL25026.1};
OS   [Ruminococcus] torques L2-14.
OC   Bacteria; Bacillota; Clostridia; Eubacteriales; Lachnospiraceae;
OC   Mediterraneibacter.
OX   NCBI_TaxID=657313 {ECO:0000313|EMBL:CBL25026.1, ECO:0000313|Proteomes:UP000008956};
RN   [1] {ECO:0000313|EMBL:CBL25026.1, ECO:0000313|Proteomes:UP000008956}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=L2-14 {ECO:0000313|EMBL:CBL25026.1,
RC   ECO:0000313|Proteomes:UP000008956};
RG   metaHIT consortium -- http://www.metahit.eu/;
RA   Pajon A., Turner K., Parkhill J., Duncan S., Flint H.;
RT   "The genome sequence of Ruminococcus torques L2-14.";
RL   Submitted (MAR-2010) to the EMBL/GenBank/DDBJ databases.
RN   [2] {ECO:0000313|EMBL:CBL25026.1, ECO:0000313|Proteomes:UP000008956}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=L2-14 {ECO:0000313|EMBL:CBL25026.1,
RC   ECO:0000313|Proteomes:UP000008956};
RA   Pajon A.;
RL   Submitted (MAR-2010) to the EMBL/GenBank/DDBJ databases.
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}.
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DR   EMBL; FP929055; CBL25026.1; -; Genomic_DNA.
DR   RefSeq; WP_015527667.1; NC_021015.1.
DR   AlphaFoldDB; D4M1B4; -.
DR   STRING; 33039.ERS852502_00772; -.
DR   KEGG; rto:RTO_02430; -.
DR   PATRIC; fig|657313.3.peg.1982; -.
DR   HOGENOM; CLU_006146_1_2_9; -.
DR   Proteomes; UP000008956; 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 {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};
KW   Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW   Rule:MF_01898}.
FT   DOMAIN          426..540
FT                   /note="Toprim"
FT                   /evidence="ECO:0000259|PROSITE:PS50880"
FT   BINDING         432
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         505
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   BINDING         505
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         507
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   SITE            457
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
FT   SITE            460
FT                   /note="Interaction with DNA"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_01898"
SQ   SEQUENCE   644 AA;  72480 MW;  185FF3C07AC176C4 CRC64;
     MGASGTEFDA EYGADQIQIL EGLEAVRKRP GMYIGSTSVR GLHHLVYEIV DNAVDEALAG
     YCDKIQVDIN KDNSITVTDN GRGIPVGINH KAGLPAVEVV FTILHAGGKF GGGGYKVSGG
     LHGVGASVVN ALSEWLEVEI ANEGKIYKQR YERGKVCYKL RVDRDCEPEM RGTKVTFLPD
     KEIFEETVFD YNTLKQRFRE MAFLTKGLKI HLRDLREEEI HEHIFHYEGG IKEFVTYLNK
     SKTALYEQII YCEGMKDNVA VEVAMQHNDS YNETTYGFVN NITTPEGGTH IAGFRSALTK
     VFNDYGKKNK LLKENEQLSG EDIREGLTAI VSVKIEDPQF EGQTKQKLGN SEARGAVDNI
     VRTQLEIFLE QNPSVAKMII EKSVMAQRAR EAARKARDLT RRKSALEGMS LPGKLADCSD
     KDPSKCEIYI VEGDSAGGSA KTARDRATQA ILPLRGKILN VEKARLDKIY GNAEIKAMIT
     AFGTGIHEDF DISKLRYHKI IIMTDADVDG AHISTLLLTF LYRFMPDLIK EGYVYLAQPP
     LYKLEKNKKV WYAYSDDELN QILTEVGRDS NNKIQRYKGL GEMDAEQLWE TTMDPEHRIL
     LRVTMDDETS SELDLTFTTL MGDKVEPRRE FIEENAKYVQ NLDI
//
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