RegulonDB RegulonDB 10.10: Operon Form
   

nac operon and associated TUs in Escherichia coli K-12 genome




Operon      
Name: nac
This page displays every known transcription unit of this operon and their known regulation.


Transcription unit          
Name: nac
Gene(s): nac   Genome Browser M3D Gene expression COLOMBOS
Note(s): The transcription of the nac gene is induced under nitrogen-limiting conditions Camarena L,1998.
Under nitrogen-rich growth conditions, the expression of the nac gene was increased in mutants for two genes that encode two terminal oxidases, cyoA and cydB, and in mutants for two transcriptional regulators, Fnr and Fur Kumar R,2011
Evidence: [LTED] Length of transcript experimentally determined
Reference(s): [1] Camarena L., et al., 1998
Promoter
Name: nacp
+1: 2061978
Sigma Factor: Sigma54 Sigmulon
Distance from start of the gene: 45
Sequence: ttggttagcttgtacatcaacaccaaaataaaactggcaagcatcttgcaatctggttgtAagtaatggcggcacttgggc
                                   -24         -12          +1                   
Evidence: [APIORCISFBSCS]
[HIPP]
[ICWHO]
[TIM]
Reference(s): [2] Huerta AM., et al., 2003
[3] Muse WB., et al., 1998
TF binding sites (TFBSs)
[FNR,-] Phrase
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
nd FNR repressor nacp nd nd nd nd nd [GEA], [BPP] [4]
[Fur,-] Phrase
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
nd Fur-Fe2+ repressor nacp nd nd nd nd nd [GEA], [BPP] [4]
[Nac,-] Phrase
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
proximal Nac repressor nacp 2062046 2062060 -75.0 tgacgaatctATCATAATCTCTTATttgacagttg nd [GEA], [APIORCISFBSCS], [BPP] [3]
[NtrC,+] Phrase
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote NtrC-phosphorylated activator nacp 2062122 2062138 -152.0 tattgggtaaTGAACCATCGTGGTGCAtaccctcctt nd [APIORCISFBSCS] [3]


Evidence    

 [APIORCISFBSCS] A person inferred or reviewed a computer inference of sequence function based on similarity to a consensus sequence.

 [HIPP] Human inference of promoter position

 [ICWHO] Inferred computationally without human oversight

 [TIM] Transcription initiation mapping

 [GEA] Gene expression analysis

 [BPP] Binding of purified proteins


Reference(s)    

 [1] Camarena L., Poggio S., Garcia N., Osorio A., 1998, Transcriptional repression of gdhA in Escherichia coli is mediated by the Nac protein., FEMS Microbiol Lett 167(1):51-6

 [2] Huerta AM., Collado-Vides J., 2003, Sigma70 promoters in Escherichia coli: specific transcription in dense regions of overlapping promoter-like signals., J Mol Biol 333(2):261-78

 [3] Muse WB., Bender RA., 1998, The nac (nitrogen assimilation control) gene from Escherichia coli., J Bacteriol 180(5):1166-73

 [4] Kumar R., Shimizu K., 2011, Transcriptional regulation of main metabolic pathways of cyoA, cydB, fnr, and fur gene knockout Escherichia coli in C-limited and N-limited aerobic continuous cultures., Microb Cell Fact 10:3

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