ID A0A268TQZ2_9HELI Unreviewed; 825 AA.
AC A0A268TQZ2;
DT 20-DEC-2017, integrated into UniProtKB/TrEMBL.
DT 20-DEC-2017, sequence version 1.
DT 27-MAR-2024, entry version 24.
DE RecName: Full=DNA gyrase subunit A {ECO:0000256|HAMAP-Rule:MF_01897};
DE EC=5.6.2.2 {ECO:0000256|HAMAP-Rule:MF_01897};
GN Name=gyrA {ECO:0000256|HAMAP-Rule:MF_01897};
GN ORFNames=BKH46_05375 {ECO:0000313|EMBL:PAF47139.1};
OS Helicobacter sp. 12S02634-8.
OC Bacteria; Campylobacterota; Epsilonproteobacteria; Campylobacterales;
OC Helicobacteraceae; Helicobacter.
OX NCBI_TaxID=1476199 {ECO:0000313|EMBL:PAF47139.1, ECO:0000313|Proteomes:UP000216003};
RN [1] {ECO:0000313|EMBL:PAF47139.1, ECO:0000313|Proteomes:UP000216003}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=12S02634-8 {ECO:0000313|EMBL:PAF47139.1,
RC ECO:0000313|Proteomes:UP000216003};
RX PubMed=28827684; DOI=10.1038/s41598-017-09091-7;
RA Gilbert M.J., Duim B., Timmerman A.J., Zomer A.L., Wagenaar J.A.;
RT "Whole genome-based phylogeny of reptile-associated Helicobacter indicates
RT independent niche adaptation followed by diversification in a
RT poikilothermic host.";
RL Sci. Rep. 7:8387-8387(2017).
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_01897}.
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_01897};
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_01897}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01897}.
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_01897}.
CC -!- SIMILARITY: Belongs to the type II topoisomerase GyrA/ParC subunit
CC family. {ECO:0000256|ARBA:ARBA00008263, ECO:0000256|HAMAP-
CC Rule:MF_01897}.
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:PAF47139.1}.
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DR EMBL; MLAP01000006; PAF47139.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A268TQZ2; -.
DR OrthoDB; 9806486at2; -.
DR Proteomes; UP000216003; 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-UniRule.
DR GO; GO:0034335; F:DNA negative supercoiling activity; IEA:UniProt.
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; cd00187; TOP4c; 1.
DR Gene3D; 3.30.1360.40; -; 1.
DR Gene3D; 2.120.10.90; DNA gyrase/topoisomerase IV, subunit A, C-terminal; 1.
DR Gene3D; 3.90.199.10; Topoisomerase II, domain 5; 1.
DR Gene3D; 1.10.268.10; Topoisomerase, domain 3; 1.
DR HAMAP; MF_01897; GyrA; 1.
DR InterPro; IPR005743; GyrA.
DR InterPro; IPR006691; GyrA/parC_rep.
DR InterPro; IPR035516; Gyrase/topoIV_suA_C.
DR InterPro; IPR013760; Topo_IIA-like_dom_sf.
DR InterPro; IPR013758; Topo_IIA_A/C_ab.
DR InterPro; IPR013757; Topo_IIA_A_a_sf.
DR InterPro; IPR002205; Topo_IIA_dom_A.
DR NCBIfam; TIGR01063; gyrA; 1.
DR PANTHER; PTHR43493:SF5; DNA GYRASE SUBUNIT A, CHLOROPLASTIC_MITOCHONDRIAL; 1.
DR PANTHER; PTHR43493; DNA GYRASE/TOPOISOMERASE SUBUNIT A; 1.
DR Pfam; PF03989; DNA_gyraseA_C; 6.
DR Pfam; PF00521; DNA_topoisoIV; 1.
DR SMART; SM00434; TOP4c; 1.
DR SUPFAM; SSF101904; GyrA/ParC C-terminal domain-like; 1.
DR SUPFAM; SSF56719; Type II DNA topoisomerase; 1.
PE 3: Inferred from homology;
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840, ECO:0000256|HAMAP-
KW Rule:MF_01897}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_01897};
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125, ECO:0000256|HAMAP-
KW Rule:MF_01897};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01897};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_01897};
KW Topoisomerase {ECO:0000256|ARBA:ARBA00023029, ECO:0000256|HAMAP-
KW Rule:MF_01897}.
FT DOMAIN 13..465
FT /note="DNA topoisomerase type IIA"
FT /evidence="ECO:0000259|SMART:SM00434"
FT MOTIF 526..532
FT /note="GyrA-box"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01897"
FT ACT_SITE 124
FT /note="O-(5'-phospho-DNA)-tyrosine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01897"
SQ SEQUENCE 825 AA; 91989 MW; DCC763D9E9ECA751 CRC64;
MDNLLDNTSV VDVKIDDSIK ESYLDYSMSV IIGRALPDAK DGLKPVHRRI LYAMSELGLT
SRVAYKKSAR IVGDVIGKYH PHGDIAVYDA LVRLAQDFSM RLELVDGQGN FGSIDGDNAA
AMRYTEARMT QASEEILRDI DKDTVDFIPN YDDTLKEPDV LPSRIPNLLV NGSSGIAVGM
ATSIPPHRID EIIDALICVL DNPEASLEDL MDCVQGPDFP TGGIIYGKQG IIDAYKTGRG
RIRVRAKVHI EKTKTKDVII IDEVPYQTNK AKLVEQISEL AKDKIIEGIA EVRDESDREG
IRVVIELKKE AMSEIVLNHL YKSTTMENTF GIILLAINNK EPKIFTLKEL LQLFLAHRKT
VVIRRTIFEL EKAKARAHIL EGLKIALDHI EEVIKLIRAS KDTEEAKNGL MQSFGLSELQ
SKAILEMRLQ RLTGLERDKI EQEYTQLLAL IDSLNAILRS EETLNAIIKE ELLEVKDKFS
SPRKTQIEDD YDAIDIEDLI PNEPVVVTMS HRGYVKRVQL KIYEKQNRGG KGKISGNTHE
DDFIESFFVA NTHDTIMFVT DKGQLYWLKV YKIPEAGRTA IGKAVVNLIN LQPEERIMAT
ITTTDFNSDK SLVFFTKNGI VKRTNLNEYS NIRSVGVRAI NLDEGDALVT AKIIDKGVQE
LFIATYQGMC IRFNVNDVRE IGRVSRGVTG IRFKANEDFV IGATTITGDT DKLLTVSQKG
IGKQTLAGAY RLQTRGGKGV IAMKLTPKTG KLVSVVNVDD ENMDLMVLTT NGKMIRVAIE
AIKEAGRNTS GVKIIDVADQ KVAYVSRCPK EDIPDGEESD TLESE
//
