RegulonDB RegulonDB 9.3:Regulon Page

YdeO DNA-binding transcriptional dual regulator

Synonyms: YdeO
YdeO belongs to the AraC/XylS family of transcriptional regulators and shows more similarity to YhiW, AppY, AdiY, and GadX than the other AraC/XylS regulators |CITS: [9409145][17712603]|. The members of this family exhibit two domains, an amino-terminal domain involved in coinducer recognition and dimerization and a carboxy-terminal domain that contains a potential helix-turn-helix DNA-binding motif |CITS: [9409145][11282467]|.
YdeO activates genes involved in the cellular response to acid resistance |CITS: [12399493][12694615][15489450]|. This protein, together with the proteins HNS, EvgA, and GadE, pertains to a specific regulatory circuit that is functional in exponential-phase cells growing in minimal medium |CITS: [12399493][12694615][15489450]|. Several of the genes directly regulated by YdeO are also directly regulated by GadX |CITS: [12694615]|.
The YdeO regulon has been determined |CITS: [25375160]|. Based on ChIP-chip, RT-qPCR, EMSA, DNase I footprinting, and reporter assay, 7 new operons were identified as members of the YdeO regulon, including four stress response transcription factors, DctR, NhaR, GadE, and Gad, and several genes involved in respiration |CITS: [25375160]|.
YdeO plays an important role in survival under both acidic and anaerobic conditions |CITS: [25375160]|.
Based on transcriptome analysis, the YdeO -> GadE transcriptional cascade was determined. A total of 106 genes were affected by YdeO, among which 53 genes were upregulated, and 23 of these were induced by GadE; a model has been proposed |CITS: [25375160]|.
The YdeO-box is an inverted repeat of hexanucleotides, with the sequence 5'-ATTTCA-3', and the length of the spacer between this inverted repeat sequence ranges from 9 to 21 nucleotides |CITS: [25375160]|.
ydeO is transcribed in an operon together with the gene safA |CITS: [12694615]|.
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Transcription factor      
TF conformation(s):
Name Conformation Type TF-Effector Interaction Type Apo/Holo Conformation Evidence (Confirmed, Strong, Weak) References
YdeO     nd nd
Evolutionary Family: AraC/XylS
Connectivity class: Local Regulator
Gene name: ydeO
  Genome position: 1582926-1583687
  Length: 762 bp / 253 aa
Operon name: safA-ydeO
TU(s) encoding the TF:
Transcription unit        Promoter

Regulated gene(s) appA, appB, appC, appX, dctR, gadE, gadW, hyaA, hyaB, hyaC, hyaD, hyaE, hyaF, mdtE, mdtF, safA, slp, uspD, ydeO, yiiS
Multifun term(s) of regulated gene(s) MultiFun Term (List of genes associated to the multifun term)
aerobic respiration (6)
anaerobic respiration (6)
membrane (5)
Transcription related (3)
electron donors (3)
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Regulated operon(s) appCBXA, gadAXW, gadE-mdtEF, hyaABCDEF, safA-ydeO, slp-dctR, yiiS-uspD
First gene in the operon(s) appC, gadE, gadE, gadW, hyaA, safA, slp, yiiS
Simple and complex regulons AppY,ArcA,Fis,IscR,NarL,NarP,YdeO
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Simple and complex regulatory phrases Regulatory phrase (List of promoters regulated by the phrase)

Transcription factor binding sites (TFBSs) arrangements       

  Functional conformation Function Promoter Sigma factor Central Rel-Pos Distance to first Gene Genes Sequence LeftPos RightPos Evidence (Confirmed, Strong, Weak) References
  YdeO activator appCp Sigma70 -27.5 -57.5 appC, appB, appX, appA
1037672 1037693 [BPP], [GEA], [IHBCE] [1]
  YdeO activator gadEp Sigma38 nd nd gadE, mdtE, mdtF nd nd [BPP], [GEA] [2]
  YdeO activator gadEp3 Sigma70 -41.0 -607.5 gadE
3657746 3657771 [BPP], [GEA], [IHBCE] [1], [3]
  YdeO activator gadWp1 nd -13.0 -46.0 gadW
3664654 3664674 [BPP], [GEA], [IHBCE] [1]
  YdeO activator hyaAp Sigma70 -61.0 -216.0 hyaA, hyaB, hyaC, hyaD, hyaE, hyaF
1031912 1031934 [BPP], [GEA], [IHBCE] [1]
  YdeO repressor safAp Sigma70 nd nd safA, ydeO nd nd [GEA] [4]
  YdeO activator slpp Sigma70 -40.0 -65.0 slp, dctR
3653884 3653908 [BPP], [GEA], [IHBCE] [1]
  YdeO activator yiiSp Sigma24 -55.0 -153.0 yiiS, uspD
4112798 4112830 [BPP], [GEA], [IHBCE] [1]

Evolutionary conservation of regulatory elements    
     Note: Evolutionary conservation of regulatory interactions and promoters is limited to gammaproteobacteria.
Promoter-target gene evolutionary conservation


 [BPP] Binding of purified proteins

 [GEA] Gene expression analysis

 [IHBCE] Inferred by a human based on computational evidence


 [1] Yamanaka Y., Oshima T., Ishihama A., Yamamoto K., 2014, Characterization of the YdeO regulon in Escherichia coli., PLoS One. 9(11):e111962

 [2] Ma Z., Masuda N., Foster JW., 2004, Characterization of EvgAS-YdeO-GadE branched regulatory circuit governing glutamate-dependent acid resistance in Escherichia coli., J Bacteriol. 186(21):7378-89

 [3] Sayed AK., Foster JW., 2009, A 750 bp sensory integration region directs global control of the Escherichia coli GadE acid resistance regulator., Mol Microbiol. 71(6):1435-50

 [4] Burton NA., Johnson MD., Antczak P., Robinson A., Lund PA., 2010, Novel aspects of the acid response network of E. coli K-12 are revealed by a study of transcriptional dynamics., J Mol Biol. 401(5):726-42