ID   REX_GEOKA               Reviewed;         213 AA.
AC   Q5L3F3;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-2005, sequence version 1.
DT   03-AUG-2022, entry version 93.
DE   RecName: Full=Redox-sensing transcriptional repressor Rex {ECO:0000255|HAMAP-Rule:MF_01131};
GN   Name=rex {ECO:0000255|HAMAP-Rule:MF_01131}; OrderedLocusNames=GK0242;
OS   Geobacillus kaustophilus (strain HTA426).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Geobacillus;
OC   Geobacillus thermoleovorans group.
OX   NCBI_TaxID=235909;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HTA426;
RX   PubMed=15576355; DOI=10.1093/nar/gkh970;
RA   Takami H., Takaki Y., Chee G.-J., Nishi S., Shimamura S., Suzuki H.,
RA   Matsui S., Uchiyama I.;
RT   "Thermoadaptation trait revealed by the genome sequence of thermophilic
RT   Geobacillus kaustophilus.";
RL   Nucleic Acids Res. 32:6292-6303(2004).
CC   -!- FUNCTION: Modulates transcription in response to changes in cellular
CC       NADH/NAD(+) redox state. {ECO:0000255|HAMAP-Rule:MF_01131}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01131}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01131}.
CC   -!- SIMILARITY: Belongs to the transcriptional regulatory Rex family.
CC       {ECO:0000255|HAMAP-Rule:MF_01131}.
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DR   EMBL; BA000043; BAD74527.1; -; Genomic_DNA.
DR   RefSeq; WP_011229751.1; NC_006510.1.
DR   AlphaFoldDB; Q5L3F3; -.
DR   SMR; Q5L3F3; -.
DR   STRING; 235909.GK0242; -.
DR   EnsemblBacteria; BAD74527; BAD74527; GK0242.
DR   KEGG; gka:GK0242; -.
DR   eggNOG; COG2344; Bacteria.
DR   HOGENOM; CLU_061534_1_1_9; -.
DR   OMA; HEQRKAG; -.
DR   Proteomes; UP000001172; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003700; F:DNA-binding transcription factor activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0045892; P:negative regulation of transcription, DNA-templated; IEA:InterPro.
DR   GO; GO:0051775; P:response to redox state; IEA:InterPro.
DR   Gene3D; 1.10.10.10; -; 1.
DR   HAMAP; MF_01131; Rex; 1.
DR   InterPro; IPR003781; CoA-bd.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   InterPro; IPR009718; Rex_DNA-bd_C_dom.
DR   InterPro; IPR022876; Tscrpt_rep_Rex.
DR   InterPro; IPR036388; WH-like_DNA-bd_sf.
DR   InterPro; IPR036390; WH_DNA-bd_sf.
DR   PANTHER; PTHR35786; PTHR35786; 1.
DR   Pfam; PF02629; CoA_binding; 1.
DR   Pfam; PF06971; Put_DNA-bind_N; 1.
DR   SMART; SM00881; CoA_binding; 1.
DR   SUPFAM; SSF46785; SSF46785; 1.
DR   SUPFAM; SSF51735; SSF51735; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; DNA-binding; NAD; Reference proteome; Repressor; Transcription;
KW   Transcription regulation.
FT   CHAIN           1..213
FT                   /note="Redox-sensing transcriptional repressor Rex"
FT                   /id="PRO_1000065400"
FT   DNA_BIND        18..57
FT                   /note="H-T-H motif"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01131"
FT   BINDING         92..97
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01131"
SQ   SEQUENCE   213 AA;  23835 MW;  FA1C02EA48BFF1E7 CRC64;
     MSNEQPKIPQ ATAKRLPLYY RFLKNLHASG KQRVSSAELS EAVKVDPATI RRDFSYFGAL
     GKKGYGYNVN YLLSFFRRTL EEDEVTEVAL FGVGNLGTAF LNYNFSKNNN TKIVMAFDVD
     ERKVGTTVGG VPVYHLDELE ERLHENIPVA ILTVPAAAAQ ALTDRLVVQG IKGILNFTPA
     RLNVPNHIRV HHIDLAIELQ SLVYFLKNYP SPS