ID   NIKR_BRUAB              Reviewed;         132 AA.
AC   Q578T1;
DT   25-OCT-2005, integrated into UniProtKB/Swiss-Prot.
DT   10-MAY-2005, sequence version 1.
DT   03-AUG-2022, entry version 84.
DE   RecName: Full=Nickel-responsive regulator;
GN   Name=nikR; OrderedLocusNames=BruAb2_0427;
OS   Brucella abortus biovar 1 (strain 9-941).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Brucellaceae; Brucella/Ochrobactrum group; Brucella.
OX   NCBI_TaxID=262698;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=9-941;
RX   PubMed=15805518; DOI=10.1128/jb.187.8.2715-2726.2005;
RA   Halling S.M., Peterson-Burch B.D., Bricker B.J., Zuerner R.L., Qing Z.,
RA   Li L.-L., Kapur V., Alt D.P., Olsen S.C.;
RT   "Completion of the genome sequence of Brucella abortus and comparison to
RT   the highly similar genomes of Brucella melitensis and Brucella suis.";
RL   J. Bacteriol. 187:2715-2726(2005).
CC   -!- FUNCTION: Transcriptional repressor of the nikABCDE operon. Is active
CC       in the presence of excessive concentrations of intracellular nickel (By
CC       similarity). {ECO:0000250}.
CC   -!- COFACTOR:
CC       Name=Ni(2+); Xref=ChEBI:CHEBI:49786; Evidence={ECO:0000250};
CC       Note=Binds 1 nickel ion per subunit. {ECO:0000250};
CC   -!- SIMILARITY: Belongs to the transcriptional regulatory CopG/NikR family.
CC       {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AE017224; AAX75853.1; -; Genomic_DNA.
DR   RefSeq; WP_002965835.1; NC_006933.1.
DR   AlphaFoldDB; Q578T1; -.
DR   SMR; Q578T1; -.
DR   EnsemblBacteria; AAX75853; AAX75853; BruAb2_0427.
DR   GeneID; 45126131; -.
DR   GeneID; 55592454; -.
DR   KEGG; bmb:BruAb2_0427; -.
DR   HOGENOM; CLU_113319_1_4_5; -.
DR   OMA; AHNCLET; -.
DR   Proteomes; UP000000540; Chromosome II.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0003700; F:DNA-binding transcription factor activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0016151; F:nickel cation binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0010045; P:response to nickel cation; IEA:InterPro.
DR   Gene3D; 1.10.1220.10; -; 1.
DR   Gene3D; 3.30.70.1150; -; 1.
DR   HAMAP; MF_00476; NikR; 1.
DR   InterPro; IPR027271; Acetolactate_synth/TF_NikR_C.
DR   InterPro; IPR045865; ACT-like_dom_sf.
DR   InterPro; IPR013321; Arc_rbn_hlx_hlx.
DR   InterPro; IPR002145; CopG.
DR   InterPro; IPR022988; Ni_resp_reg_NikR.
DR   InterPro; IPR014160; Nickel_NikR_proteobac.
DR   InterPro; IPR010985; Ribbon_hlx_hlx.
DR   InterPro; IPR014864; TF_NikR_Ni-bd_C.
DR   Pfam; PF08753; NikR_C; 1.
DR   Pfam; PF01402; RHH_1; 1.
DR   SUPFAM; SSF47598; SSF47598; 1.
DR   SUPFAM; SSF55021; SSF55021; 1.
DR   TIGRFAMs; TIGR02793; nikR; 1.
PE   3: Inferred from homology;
KW   DNA-binding; Metal-binding; Nickel; Repressor; Transcription;
KW   Transcription regulation.
FT   CHAIN           1..132
FT                   /note="Nickel-responsive regulator"
FT                   /id="PRO_0000139282"
FT   BINDING         77
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000250"
FT   BINDING         88
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000250"
FT   BINDING         90
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000250"
FT   BINDING         96
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   132 AA;  14930 MW;  953E68CF7E7F0E37 CRC64;
     MQRITITIDD DLMAALDRMI EIKGYQNRSE ALRDLARTGL QQASLEEGQM EACVGVLSYT
     YDHSARDLSK KLTNTHHDHH NISVASMHVH LDHDRCLEVS ILKGKTDDVR HFADHVKAER
     HVTHGTLAVL PL