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DecR DNA-binding transcriptional dual regulator

Synonyms: DecR
DecR is a regulator with an important role in cysteine detoxification. The absence of decR increases the inhibitory effect on bacterial growth caused by cysteine [4]. The presence of cysteine improves the interaction between DecR and the promoter region of the operon yhaOM, thereby causing activation [4]. DecR (YbaO) may have a role in Rob-mediated regulation [1]. In a Salmonella enterica cutR mutant, E. coli ybaO restored cysteine-responsive regulation of the CdsH cysteine desulfhydrase [6]. decR is a member of the Rob regulon [1]. Based on transcript profiling with a cyuR mutant and overpression of cyuR under anaerobic cysteine growth conditions, 37 genes showed at least a 5-fold change in expression, with increased expression of 20 genes and diminished expression of 17 genes [7].
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Transcription factor      
TF conformation(s):
Name Conformation Type TF-Effector Interaction Type Apo/Holo Conformation Evidence (Confirmed, Strong, Weak) References
DecR Functional   [APPPINH], [HIFS], [IEP] [1], [2], [3], [4]
Evolutionary Family: AsnC
Connectivity class: Local Regulator
Gene name: decR
  Genome position: 468383-468841
  Length: 459 bp / 152 aa
Operon name: decR
TU(s) encoding the TF:
Transcription unit        Promoter

Regulated gene(s)
Regulated operon(s)
First gene in the operon(s)
Simple and complex regulatory phrases Regulatory phrase (List of promoters regulated by the phrase)

Transcription factor regulation    

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

High-throughput Transcription factor binding sites (TFBSs)

  Functional conformation Function Object name Object type Distance to first Gene Sequence LeftPos RightPos Growth Condition Evidence (Confirmed, Strong, Weak) References
  DecR activator nd nd nd nd nd nd [BPP], [GEA], [4], [5]

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



 [1] Bennik MH., Pomposiello PJ., Thorne DF., Demple B., 2000, Defining a rob regulon in Escherichia coli by using transposon mutagenesis., J Bacteriol 182(13):3794-801

 [2] Perez-Rueda E., Collado-Vides J., 2000, The repertoire of DNA-binding transcriptional regulators in Escherichia coli K-12., Nucleic Acids Res 28(8):1838-47

 [3] Perez-Rueda E., Collado-Vides J., Segovia L., 2004, Phylogenetic distribution of DNA-binding transcription factors in bacteria and archaea., Comput Biol Chem 28(5-6):341-50

 [4] Shimada T., Tanaka K., Ishihama A., 2016, Transcription factor DecR (YbaO) controls detoxification of L-cysteine in Escherichia coli., Microbiology 162(9):1698-1707

 [5] Shimada T., Ogasawara H., Ishihama A., 2018, Single-target regulators form a minor group of transcription factors in Escherichia coli K-12., Nucleic Acids Res 46(8):3921-3936

 [6] Oguri T, Schneider B, Reitzer L, 2012, Cysteine catabolism and cysteine desulfhydrase (CdsH/STM0458) in Salmonella enterica serovar typhimurium., J Bacteriol, 2012 Aug

 [7] Loddeke M., Schneider B., Oguri T., Mehta I., Xuan Z., Reitzer L., 2017, Anaerobic Cysteine Degradation and Potential Metabolic Coordination in Salmonella enterica and Escherichia coli., J Bacteriol 199(16)