(data stored in SCRATCH zone)

SWISSPROT: A5GQ36_SYNR3

ID   A5GQ36_SYNR3            Unreviewed;       657 AA.
AC   A5GQ36;
DT   12-JUN-2007, integrated into UniProtKB/TrEMBL.
DT   12-JUN-2007, sequence version 1.
DT   08-MAY-2019, entry version 90.
DE   RecName: Full=DNA gyrase subunit B {ECO:0000256|HAMAP-Rule:MF_01898};
DE            EC=5.6.2.3 {ECO:0000256|HAMAP-Rule:MF_01898};
GN   Name=gyrB {ECO:0000256|HAMAP-Rule:MF_01898,
GN   ECO:0000313|EMBL:CAK26995.1};
GN   OrderedLocusNames=SynRCC307_0092 {ECO:0000313|EMBL:CAK26995.1};
OS   Synechococcus sp. (strain RCC307).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae;
OC   Synechococcus.
OX   NCBI_TaxID=316278 {ECO:0000313|EMBL:CAK26995.1, ECO:0000313|Proteomes:UP000001115};
RN   [1] {ECO:0000313|EMBL:CAK26995.1, ECO:0000313|Proteomes:UP000001115}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RCC307 {ECO:0000313|Proteomes:UP000001115};
RA   Genoscope;
RL   Submitted (MAY-2006) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: A type II topoisomerase that negatively supercoils
CC       closed circular double-stranded (ds) DNA in an ATP-dependent
CC       manner to modulate DNA topology and maintain chromosomes in an
CC       underwound state. Negative supercoiling favors strand separation,
CC       and DNA replication, transcription, recombination and repair, all
CC       of which involve strand separation. Also able to catalyze the
CC       interconversion of other topological isomers of dsDNA rings,
CC       including catenanes and knotted rings. Type II topoisomerases
CC       break and join 2 DNA strands simultaneously in an ATP-dependent
CC       manner. {ECO:0000256|HAMAP-Rule:MF_01898}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP-dependent breakage, passage and rejoining of double-
CC         stranded DNA.; EC=5.6.2.3; Evidence={ECO:0000256|HAMAP-
CC         Rule:MF_01898, ECO:0000256|SAAS:SAAS01180974};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000256|SAAS:SAAS00924966};
CC   -!- COFACTOR:
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000256|SAAS:SAAS00888357};
CC   -!- SUBUNIT: Heterotetramer, composed of two GyrA and two GyrB chains.
CC       In the heterotetramer, GyrA contains the active site tyrosine that
CC       forms a transient covalent intermediate with DNA, while GyrB binds
CC       cofactors and catalyzes ATP hydrolysis. {ECO:0000256|HAMAP-
CC       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
CC       topoisomerases; in organisms with a single type II topoisomerase
CC       this enzyme also has to decatenate newly replicated chromosomes.
CC       {ECO:0000256|HAMAP-Rule:MF_01898}.
CC   -!- SIMILARITY: Belongs to the type II topoisomerase family.
CC       {ECO:0000256|HAMAP-Rule:MF_01898}.
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DR   EMBL; CT978603; CAK26995.1; -; Genomic_DNA.
DR   RefSeq; WP_011934510.1; NC_009482.1.
DR   STRING; 316278.SynRCC307_0092; -.
DR   EnsemblBacteria; CAK26995; CAK26995; SynRCC307_0092.
DR   KEGG; syr:SynRCC307_0092; -.
DR   eggNOG; ENOG4105C7D; Bacteria.
DR   eggNOG; COG0187; LUCA.
DR   HOGENOM; HOG000075154; -.
DR   KO; K02470; -.
DR   OMA; IYIACPP; -.
DR   OrthoDB; 205481at2; -.
DR   BioCyc; SSP316278:G1GJL-93-MONOMER; -.
DR   Proteomes; UP000001115; 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 (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-dependent DNA replication; IEA:UniProtKB-UniRule.
DR   CDD; cd00075; HATPase_c; 1.
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; -; 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_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; 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;
DR   PRODOM; A5GQ36.
DR   SWISS-2DPAGE; A5GQ36.
KW   ATP-binding {ECO:0000256|HAMAP-Rule:MF_01898,
KW   ECO:0000256|SAAS:SAAS00924926};
KW   Complete proteome {ECO:0000313|Proteomes:UP000001115};
KW   Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01898};
KW   DNA-binding {ECO:0000256|SAAS:SAAS00888349};
KW   Isomerase {ECO:0000256|HAMAP-Rule:MF_01898,
KW   ECO:0000256|SAAS:SAAS00924998, ECO:0000313|EMBL:CAK26995.1};
KW   Magnesium {ECO:0000256|SAAS:SAAS00906748};
KW   Metal-binding {ECO:0000256|SAAS:SAAS00906804};
KW   Nucleotide-binding {ECO:0000256|HAMAP-Rule:MF_01898,
KW   ECO:0000256|SAAS:SAAS00924952};
KW   Reference proteome {ECO:0000313|Proteomes:UP000001115};
KW   Topoisomerase {ECO:0000256|HAMAP-Rule:MF_01898,
KW   ECO:0000256|SAAS:SAAS00924964}.
FT   DOMAIN      438    553       Toprim. {ECO:0000259|PROSITE:PS50880}.
SQ   SEQUENCE   657 AA;  72448 MW;  B4E06ED607AC2B6B CRC64;
     MSEATRPSSS QVQAAYGAEQ IQVLEGLEPV RKRPGMYIGS TGPRGLHHLV YEVVDNSVDE
     ALAGHCNTID VCLRADGSCS VADNGRGIPT DVHPRTGKSA LETVLTVLHA GGKFGSGGYK
     VSGGLHGVGV SVVNALSEWV EVTVHRQDKV HRQRFERGAP IGSLASEAGE KGRTGTSVCF
     KPDIEIFTGG ISFDYATLSG RLRELAYLNG GVKIVFRDER PEAAGEDGQP HEEIYFYEGG
     IREYVNYMNA EKDPLHPDII YVNSEKDGVQ VEAALQWCVD AYSDSILGFA NNIRTVDGGT
     HIEGLKTVLT RTLNTFARKR GKRKDSDGNL AGENIREGLT AVLSVKVPDP EFEGQTKTKL
     GNTEVRGIVD TVVGEALSEY LEFHPQVIDL ILEKAIQAFN AAEAARRARE LVRRKSVLES
     STLPGKLADC SSRDPSESEI YIVEGDSAGG SAKQGRDRRN QAILPLRGKI LNIEKTDDAK
     IYKNTEIQAL ITALGLGIKG EEFDVSNLRY HRIVIMTDAD VDGAHIRTLI LTFFYRYQRE
     LVEGGYIYIA CPPLYKVERG KNHTYCYNEQ DLKKTLDGFG EKANYTIQRF KGLGEMMPQQ
     LWETTMDPTT RTMKRVEIED AAQADRIFTI LMGDKVAPRR EFIETHSAEL NLADLDI
//

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