GYRB_SHIFL
ID GYRB_SHIFL Reviewed; 804 AA.
AC P0AES8; O08438; P06982;
DT 01-APR-1988, integrated into UniProtKB/Swiss-Prot.
DT 23-JAN-2007, sequence version 2.
DT 03-AUG-2022, entry version 122.
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};
GN OrderedLocusNames=SF3765, S4006;
OS Shigella flexneri.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Shigella.
OX NCBI_TaxID=623;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=301 / Serotype 2a;
RX PubMed=12384590; DOI=10.1093/nar/gkf566;
RA Jin Q., Yuan Z., Xu J., Wang Y., Shen Y., Lu W., Wang J., Liu H., Yang J.,
RA Yang F., Zhang X., Zhang J., Yang G., Wu H., Qu D., Dong J., Sun L.,
RA Xue Y., Zhao A., Gao Y., Zhu J., Kan B., Ding K., Chen S., Cheng H.,
RA Yao Z., He B., Chen R., Ma D., Qiang B., Wen Y., Hou Y., Yu J.;
RT "Genome sequence of Shigella flexneri 2a: insights into pathogenicity
RT through comparison with genomes of Escherichia coli K12 and O157.";
RL Nucleic Acids Res. 30:4432-4441(2002).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700930 / 2457T / Serotype 2a;
RX PubMed=12704152; DOI=10.1128/iai.71.5.2775-2786.2003;
RA Wei J., Goldberg M.B., Burland V., Venkatesan M.M., Deng W., Fournier G.,
RA Mayhew G.F., Plunkett G. III, Rose D.J., Darling A., Mau B., Perna N.T.,
RA Payne S.M., Runyen-Janecky L.J., Zhou S., Schwartz D.C., Blattner F.R.;
RT "Complete genome sequence and comparative genomics of Shigella flexneri
RT serotype 2a strain 2457T.";
RL Infect. Immun. 71:2775-2786(2003).
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 -!- ACTIVITY REGULATION: Target of two classes of inhibitors, coumarins and
CC quinolones. Coumarins bind to GyrB and are competitive inhibitors with
CC respect to ATP. Quinolones bind DNA gyrase when the enzyme is complexed
CC with DNA and trap the enzyme in an abortive ternary complex (By
CC similarity). {ECO:0000250}.
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; AE005674; AAN45208.2; -; Genomic_DNA.
DR EMBL; AE014073; AAP18989.1; -; Genomic_DNA.
DR RefSeq; NP_709501.2; NC_004337.2.
DR RefSeq; WP_000072067.1; NZ_WPGW01000019.1.
DR AlphaFoldDB; P0AES8; -.
DR BMRB; P0AES8; -.
DR SMR; P0AES8; -.
DR STRING; 198214.SF3765; -.
DR EnsemblBacteria; AAN45208; AAN45208; SF3765.
DR EnsemblBacteria; AAP18989; AAP18989; S4006.
DR GeneID; 1026143; -.
DR GeneID; 66672403; -.
DR KEGG; sfl:SF3765; -.
DR KEGG; sfx:S4006; -.
DR PATRIC; fig|198214.7.peg.4442; -.
DR HOGENOM; CLU_006146_4_1_6; -.
DR OMA; LWETTMH; -.
DR OrthoDB; 205481at2; -.
DR Proteomes; UP000001006; Chromosome.
DR Proteomes; UP000002673; 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 GO; GO:0046677; P:response to antibiotic; IEA:UniProtKB-KW.
DR CDD; cd03366; TOPRIM_TopoIIA_GyrB; 1.
DR Gene3D; 3.30.230.10; -; 1.
DR Gene3D; 3.30.565.10; -; 1.
DR Gene3D; 3.40.50.670; -; 2.
DR HAMAP; MF_01898; GyrB; 1.
DR InterPro; IPR002288; DNA_gyrase_B_C.
DR InterPro; IPR011557; GyrB.
DR InterPro; IPR041423; GyrB_insert.
DR InterPro; IPR003594; HATPase_C.
DR InterPro; IPR036890; HATPase_C_sf.
DR InterPro; IPR020568; Ribosomal_S5_D2-typ_fold.
DR InterPro; IPR014721; Ribosomal_S5_D2-typ_fold_subgr.
DR InterPro; IPR001241; Topo_IIA.
DR InterPro; IPR013760; Topo_IIA-like_dom_sf.
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 Pfam; PF00204; DNA_gyraseB; 1.
DR Pfam; PF00986; DNA_gyraseB_C; 1.
DR Pfam; PF18053; GyrB_insert; 1.
DR Pfam; PF02518; HATPase_c; 1.
DR Pfam; PF01751; Toprim; 1.
DR SMART; SM00387; HATPase_c; 1.
DR SMART; SM00433; TOP2c; 1.
DR SUPFAM; SSF54211; SSF54211; 1.
DR SUPFAM; SSF55874; SSF55874; 1.
DR SUPFAM; SSF56719; SSF56719; 1.
DR TIGRFAMs; TIGR01059; gyrB; 1.
DR PROSITE; PS00177; TOPOISOMERASE_II; 1.
DR PROSITE; PS50880; TOPRIM; 1.
PE 3: Inferred from homology;
KW Antibiotic resistance; ATP-binding; Cytoplasm; DNA-binding; Isomerase;
KW Magnesium; Metal-binding; Nucleotide-binding; Reference proteome;
KW Topoisomerase.
FT INIT_MET 1
FT /note="Removed"
FT /evidence="ECO:0000250"
FT CHAIN 2..804
FT /note="DNA gyrase subunit B"
FT /id="PRO_0000145335"
FT DOMAIN 418..533
FT /note="Toprim"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT BINDING 424
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 498
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 498
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
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 SITE 449
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
FT SITE 452
FT /note="Interaction with DNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01898"
SQ SEQUENCE 804 AA; 89950 MW; D831B95FFB3A7EE3 CRC64;
MSNSYDSSSI KVLKGLDAVR KRPGMYIGDT DDGTGLHHMV FEVVDNAIDE ALAGHCKEII
VTIHADNSVS VQDDGRGIPT GIHPEEGVSA AEVIMTVLHA GGKFDDNSYK VSGGLHGVGV
SVVNALSQKL ELVIQREGKI HRQIYEHGVP QAPLAVTGET EKTGTMVRFW PSLETFTNVT
EFEYEILAKR LRELSFLNSG VSIRLRDKRD GKEDHFHYEG GIKAFVEYLN KNKTPIHPNI
FYFSTEKDGI GVEVALQWND GFQENIYCFT NNIPQRDGGT HLAGFRAAMT RTLNAYMDKE
GYSKKAKVSA TGDDAREGLI AVVSVKVPDP KFSSQTKDKL VSSEVKSAVE QQMNELLAEY
LLENPTDAKI VVGKIIDAAR AREAARRARE MTRRKGALDL AGLPGKLADC QERDPALSEL
YLVEGDSAGG SAKQGRNRKN QAILPLKGKI LNVEKARFDK MLSSQEVATL ITALGCGIGR
DEYNPDKLRY HSIIIMTDAD VDGSHIRTLL LTFFYRQMPE IVERGHVYIA QPPLYKVKKG
KQEQYIKDDE AMDQYQISIA LDGATLHTNA SAPALAGEAL EKLVSEYNAT QKMINRMERR
YPKAMLKELI YQPTLTEADL SDEQTVTRWV NALVSELNDK EQHGSQWKFD VHTNAEQNLF
EPIVRVRTHG VDTDYPLDHE FITGGEYRRI CTLGEKLRGL LEEDAFIERG ERRQPVASFE
QALDWLVKES RRGLSIQRYK GLGEMNPEQL WETTMDPESR RMLRVTVKDA IAADQLFTTL
MGDAVEPRRA FIEENALKAA NIDI
