ID   REX_PETMO               Reviewed;         211 AA.
AC   A9BF21;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   15-JAN-2008, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=Redox-sensing transcriptional repressor Rex {ECO:0000255|HAMAP-Rule:MF_01131};
GN   Name=rex {ECO:0000255|HAMAP-Rule:MF_01131}; OrderedLocusNames=Pmob_0343;
OS   Petrotoga mobilis (strain DSM 10674 / SJ95).
OC   Bacteria; Thermotogae; Petrotogales; Petrotogaceae; Petrotoga.
OX   NCBI_TaxID=403833;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 10674 / SJ95;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Meincke L., Brettin T., Bruce D., Detter J.C., Han C.,
RA   Kuske C.R., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Mikhailova N., Noll K., Richardson P.;
RT   "Complete sequence of Petroga mobilis SJ95.";
RL   Submitted (NOV-2007) to the EMBL/GenBank/DDBJ databases.
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; CP000879; ABX31085.1; -; Genomic_DNA.
DR   RefSeq; WP_012208192.1; NC_010003.1.
DR   AlphaFoldDB; A9BF21; -.
DR   SMR; A9BF21; -.
DR   STRING; 403833.Pmob_0343; -.
DR   EnsemblBacteria; ABX31085; ABX31085; Pmob_0343.
DR   KEGG; pmo:Pmob_0343; -.
DR   eggNOG; COG2344; Bacteria.
DR   HOGENOM; CLU_061534_1_0_0; -.
DR   OMA; HEQRKAG; -.
DR   OrthoDB; 1872374at2; -.
DR   Proteomes; UP000000789; 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; Repressor; Transcription;
KW   Transcription regulation.
FT   CHAIN           1..211
FT                   /note="Redox-sensing transcriptional repressor Rex"
FT                   /id="PRO_1000137330"
FT   DNA_BIND        16..55
FT                   /note="H-T-H motif"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01131"
FT   BINDING         90..95
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01131"
SQ   SEQUENCE   211 AA;  23819 MW;  2B49A13EA1198816 CRC64;
     MKSPKVPKPT IKRLAMYNRF LRELREEGIP KTSSHEIAEA LNIKASQVRK DLSYFGEFGK
     RGVGYDVENL CLKIHKILGT ERVWNVAIIG VGNLGRAISH YPELEKYKFK IVAAYDVDKR
     KINSILLPGI PIKHIKELKN KNDELDFEIA ILTVPSNVAQ EVANILIEAG VKGILNFAPV
     TLNSDDRVVI ENVDFVISLK TLTYEIVSKY D