ID Q6CYR7_PECAS Unreviewed; 805 AA.
AC Q6CYR7;
DT 16-AUG-2004, integrated into UniProtKB/TrEMBL.
DT 16-AUG-2004, sequence version 1.
DT 27-MAR-2024, entry version 144.
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:CAG77334.1};
GN Synonyms=himB {ECO:0000313|EMBL:CAG77334.1}, hisU
GN {ECO:0000313|EMBL:CAG77334.1}, nalC {ECO:0000313|EMBL:CAG77334.1},
GN parA {ECO:0000313|EMBL:CAG77334.1}, pcbA
GN {ECO:0000313|EMBL:CAG77334.1};
GN OrderedLocusNames=ECA4438 {ECO:0000313|EMBL:CAG77334.1};
OS Pectobacterium atrosepticum (strain SCRI 1043 / ATCC BAA-672) (Erwinia
OS carotovora subsp. atroseptica).
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC Pectobacteriaceae; Pectobacterium.
OX NCBI_TaxID=218491 {ECO:0000313|EMBL:CAG77334.1, ECO:0000313|Proteomes:UP000007966};
RN [1] {ECO:0000313|EMBL:CAG77334.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=SCRI1043 {ECO:0000313|EMBL:CAG77334.1};
RA Bell K.S., Sebaihia M., Pritchard L., Holden M., Hyman L.J., Holeva M.C.,
RA Thomson N.R., Bentley S.D., Churcher C., Mungall K., Atkin R., Bason N.,
RA Brooks K., Chillingworth T., Clark K., Doggett J., Fraser A., Hance Z.,
RA Hauser H., Jagels K., Moule S., Norbertczak H., Ormond D., Price C.,
RA Quail M.A., Sanders M., Walker D., Whitehead S., Salmond G.P.C.,
RA Birch P.R.J., Barrell B.G., Parkhill J., Toth I.K.;
RT "The genome sequence of the enterobacterial phytopathogen Erwinia
RT carotovora subsp. atroseptica SCRI1043 and functional genomic
RT identification of novel virulence factors.";
RL Submitted (FEB-2004) 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; BX950851; CAG77334.1; -; Genomic_DNA.
DR RefSeq; WP_011095897.1; NC_004547.2.
DR AlphaFoldDB; Q6CYR7; -.
DR STRING; 218491.ECA4438; -.
DR GeneID; 57211131; -.
DR KEGG; eca:ECA4438; -.
DR PATRIC; fig|218491.5.peg.4526; -.
DR eggNOG; COG0187; Bacteria.
DR HOGENOM; CLU_006146_4_1_6; -.
DR OrthoDB; 9802808at2; -.
DR Proteomes; UP000007966; 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:UP000007966};
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; 89758 MW; 5899BFC0C09BF125 CRC64;
MSNSYDSSSI KVLKGLDAVR KRPGMYIGDT DDGTGLHHMV FEVVDNAIDE ALAGYCKDII
ITIHADNSVS VQDDGRGIPT GIHEEEGISA AEVIMTVLHA GGKFDDNSYK VSGGLHGVGV
SVVNALSEKL KLVIHREGKL HEQTYKHGVA QAPLAVTGET DRTGTTVRFW PSHETFSNVL
EFEYEILAKR LRELSFLNSG VSIRLIDDRE KDKADHYHYD GGIKAFVDYL NRNKTPIHPN
VFYFSTMKDD IGVEVALQWN DGFQENIYCF TNNIPQRDGG THLAGFRAAM TRTLNTYMDK
EGYSKKSKIS ATGDDAREGL IAVVSVKVPD PKFSSQTKDK LVSSEVKTAV ESLVNEKLVD
YLMENPSDAK IVVGKIIDAA RAREAARKAR DMTRRKGALD LAGLPGKLAD CQERDPALSE
LYLVEGDSAG GSAKQGRNRK NQAILPLKGK ILNVEKARFD KMLSSQEVAT LITALGCGIG
RDEYNPDKLR YHSIIIMTDA DVDGSHIRTL LLTFFYRQLP EIVERGHVYI AQPPLYKVKK
GKQEQYIKDD EAMDQYQIML ALDGATLHTN AQAPALAGEP LEKLVSEHYA VQKLIGRMER
RFPRPLLNRL IYQPTLSEAD LSEREKVQAW AESLISGLNA NEVHGSTYSF VVHHDEERSV
FEPALRVRTH GVDTDYPLGA GFVAGGEYRK LNLLGEKLRG LIEEDAFIER GERRQPVASF
EQALEWLVKE SRRGLTVQRY KGLGEMNPDQ LWETTMDPTS RRMLRVTVKD AIAADELFTT
LMGDAVEPRR AFIEENALKA MNIDI
//