RegulonDB RegulonDB 10.8: Operon Form
   

acs-yjcH-actP operon and associated TUs in Escherichia coli K-12 genome




Operon      
Name: acs-yjcH-actP
This page displays every known transcription unit of this operon and their known regulation.


Transcription unit       
Name: actP
Gene(s): actP   Genome Browser M3D Gene expression COLOMBOS
Promoter
Name: actPp
+1: 4284935
Sigma Factor: Sigma54 Sigmulon
Distance from start of the gene: 33
Sequence: gatctcctttgttctcaccggtatctacatctggcgggcgaacggcgaattcgaccgtctTaataatgaagtcctgcatga
                                -24         -12             +1                   
Note(s): This promoter was identified by microarray assays with a mutant σ54 strain and a σ54-overexpressing strain, and by σ54-related promoter element identification Zhao K,2010
We assigned a putative transcription start site to this promoter based on the observation that the majority of the σ54-dependent promoters, whose transcription start sites were determined experimentally, present a distance of 11 nucleotides between the transcription start site and the -12 box Barrios H,1999.
Evidence: [HIPP]
[IEP]
Reference(s): [1] Zhao K., et al., 2010


Transcription unit          
Name: acs-yjcHG
Gene(s): actP, yjcH, acs   Genome Browser M3D Gene expression COLOMBOS
Note(s): Transcription of acs may be negatively regulated by IclR through an indirect effect Kumari S,20008997713. Fnr activates the transcription of acs by binding to two sites located close to the transcription start site. This has been demonstrated by gene expression analysis and protein binding to the region, but the specific sequences of the sites were not reported Kumari S,2000.
Based on arcA deletion experiments, it appears that ArcA-P represses the acs-yjcH-actP operon, resulting in a lower rate of acetate uptake and assimilation 29193870
Evidence: [LTED] Length of transcript experimentally determined
Reference(s): [2] Gimenez R., et al., 2003
[3] Kumari S., et al., 2000
Promoter
Name: acsp2
+1: 4287391
Sigma Factor: Sigma70, Sigma38
Distance from start of the gene: 20
Sequence: atactaaacaaaactgccaatacccctacatttaacgcttatgccacatattattaacatCctacaaggagaacaaaagca
                               -35              -10         +1                   
Note(s): The effect of RpoS is likely indirect and may be mediated by competing with σ70 for core polymerase Kumari S,2000. 8997713
Evidence: [AIPP]
[HTIM]
Reference(s): [4] Beatty CM., et al., 2003
[5] Kumari S., et al., 2000
[6] Olvera L., et al., 2009
TF binding sites (TFBSs)
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
proximal CRP-cAMP1 activator acsp2 4287450 4287471 -69.5 aattctacttTTGCGTGATCTGTCGCCCAAATactaaacaaa nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(CHIP-SV/SM)], [CV(GEA/ROMA)], [CV(GEA/ROMA/SM)], [GEA], [SM] [3], [4], [11]
remote CRP-cAMP2 activator acsp2 4287503 4287524 -122.5 ttaatcaactTTTGTTGCTGACCTTCAAAAATtaccctgccg nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(CHIP-SV/SM)], [CV(GEA/ROMA)], [CV(GEA/ROMA/SM)], [GEA], [SM] [3], [4], [11]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
proximal Fis1 repressor acsp2 4287443 4287457 -59.0 gtgatctgtcGCCCAAATACTAAACaaaactgcca nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(CHIP-SV/SM)], [CV(GEA/ROMA)], [CV(GEA/ROMA/SM)], [GEA], [SM] [7]
remote Fis2 repressor acsp2 4287482 4287496 -98.0 aaattaccctGCCGTTTATTTGCACaattctactt nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(CHIP-SV/SM)], [CV(GEA/ROMA)], [CV(GEA/ROMA/SM)], [GEA], [SM] [7]
remote Fis repressor acsp2 4287649 4287663 -265.0 tcgcccctatGTGTAACAAATAACCacactgtgaa nd [BPP], [GEA] [7], [8], [9]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote IHF1 repressor acsp2 4287538 4287550 -153.0 tgcataactgCATGTTCCTCAAAgaattaatca nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(CHIP-SV/SM)], [CV(GEA/ROMA)], [CV(GEA/ROMA/SM)], [GEA], [SM] [7], [10], [11]
remote IHF2 repressor acsp2 4287565 4287577 -180.0 tcagtatcttCCTCTTTTTCAACagcatgcata nd [AIBSCS], [BPP], [CV(CHIP-SV/GEA/ROMA)], [CV(GEA/ROMA)], [GEA] [7]
remote IHF repressor acsp2 4287610 4287622 -225.0 ctttaatcaaTTGTAAGTGCATGtaaaatacca nd [BPP], [GEA] [7], [8], [9]
Note(s): 1Activation of the acsp2 promoter absolutely requires a CRP site centered at position -69.5, while optimal expression requires an additional site centered at position -122.5.
2Activation of the acsp2 promoter absolutely requires a CRP site centered at position -69.5, while optimal expression requires an additional site centered at position -122.5.1Fis binding to this site functions as an anti-activator of CRP.
2Fis binding to this site functions as an anti-activator of CRP.
1IHF binding to this site functions as an antiactivator of CRP.
2The regulatory effect of this IHF site is as yet not known.

3The regulatory effect of this IHF site is as yet not known.

4IHF binding to this site functions as an antiactivator of CRP.
5Activation of the acsp2 promoter absolutely requires a CRP site centered at position -69.5, while optimal expression requires an additional site centered at position -122.5.
6Fis binding to this site functions as an anti-activator of CRP.
7Activation of the acsp2 promoter absolutely requires a CRP site centered at position -69.5, while optimal expression requires an additional site centered at position -122.5.
8Fis binding to this site functions as an anti-activator of CRP.


Transcription unit          
Name: acs-yjcHG
Gene(s): actP, yjcH, acs   Genome Browser M3D Gene expression COLOMBOS
Note(s): Transcription of acs may be negatively regulated by IclR through an indirect effect Kumari S,20008997713. Fnr activates the transcription of acs by binding to two sites located close to the transcription start site. This has been demonstrated by gene expression analysis and protein binding to the region, but the specific sequences of the sites were not reported Kumari S,2000.
Evidence: [LTED] Length of transcript experimentally determined
Reference(s): [2] Gimenez R., et al., 2003
[3] Kumari S., et al., 2000
Promoter
Name: acsp1
+1: 4287595
Sigma Factor: Sigma70 Sigmulon
Distance from start of the gene: 224
Sequence: aataaccacactgtgaatgttgtctttaatcaattgtaagtgcatgtaaaataccactttAgagttagtcagtatcttcct
                    -35                        -10          +1                   
Note(s): The effect by RpoS is likely indirect and might be mediated by competing with σ70 for core polymerase Kumari S,2000. 8997713
Evidence: [AIPP]
Reference(s): [8] Browning DF., et al., 2002
[5] Kumari S., et al., 2000
TF binding sites (TFBSs)
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
proximal Fis1 repressor acsp1 4287649 4287663 -61.0 tcgcccctatGTGTAACAAATAACCacactgtgaa nd [BPP], [GEA] [7], [8]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
proximal IHF1 repressor acsp1 4287610 4287622 -21.0 ctttaatcaaTTGTAAGTGCATGtaaaatacca nd [BPP], [GEA] [7], [8]
Note(s): 1Fis binding to this site strongly represses the acsP1 promoter and weakly represses nrfAp, a promoter that is overlapping and divergent to acsP1.1IHF binding to this site strongly represses the acsp1 promoter and weakly represses nrfAp, a promoter that is overlapping and divergent to acsp1.1Fis binding to this site strongly represses the acsP1 promoter and weakly represses nrfAp, a promoter that is overlapping and divergent to acsP1.
2IHF binding to this site strongly represses the acsp1 promoter and weakly represses nrfAp, a promoter that is overlapping and divergent to acsp1.


Regulation by sRNA    
  Small RNA name (Regulator) Regulation type Mechanism Function Binding Sites Evidence Reference
LeftPos RightPos Sequence (RNA-strand)
  omrA antisense post-transcriptional regulation repressor       [IMP] [12]
[13]
  omrB antisense post-transcriptional regulation repressor       [IMP] [13]
  omrA antisense post-transcriptional regulation repressor       [IMP] [13]
  omrB antisense post-transcriptional regulation repressor       [IMP] [12]
[13]
Notes: "The provided sequence is that of the RNA strand,i.e. 'U's are showed instead the 'T'"




Reference(s)    

 [1] Zhao K., Liu M., Burgess RR., 2010, Promoter and regulon analysis of nitrogen assimilation factor, sigma54, reveal alternative strategy for E. coli MG1655 flagellar biosynthesis., Nucleic Acids Res 38(4):1273-83

 [2] Gimenez R., Nunez MF., Badia J., Aguilar J., Baldoma L., 2003, The gene yjcG, cotranscribed with the gene acs, encodes an acetate permease in Escherichia coli., J Bacteriol 185(21):6448-55

 [3] Kumari S., Beatty CM., Browning DF., Busby SJ., Simel EJ., Hovel-Miner G., Wolfe AJ., 2000, Regulation of acetyl coenzyme A synthetase in Escherichia coli., J Bacteriol 182(15):4173-9

 [4] Beatty CM., Browning DF., Busby SJ., Wolfe AJ., 2003, Cyclic AMP receptor protein-dependent activation of the Escherichia coli acsP2 promoter by a synergistic class III mechanism., J Bacteriol 185(17):5148-57

 [5] Kumari S., Simel EJ., Wolfe AJ., 2000, sigma(70) is the principal sigma factor responsible for transcription of acs, which encodes acetyl coenzyme A synthetase in Escherichia coli., J Bacteriol 182(2):551-4

 [6] Olvera L., Mendoza-Vargas A., Flores N., Olvera M., Sigala JC., Gosset G., Morett E., Bolivar F., 2009, Transcription analysis of central metabolism genes in Escherichia coli. Possible roles of sigma38 in their expression, as a response to carbon limitation., PLoS One 4(10):e7466

 [7] Browning DF., Beatty CM., Sanstad EA., Gunn KE., Busby SJ., Wolfe AJ., 2004, Modulation of CRP-dependent transcription at the Escherichia coli acsP2 promoter by nucleoprotein complexes: anti-activation by the nucleoid proteins FIS and IHF., Mol Microbiol 51(1):241-54

 [8] Browning DF., Beatty CM., Wolfe AJ., Cole JA., Busby SJ., 2002, Independent regulation of the divergent Escherichia coli nrfA and acsP1 promoters by a nucleoprotein assembly at a shared regulatory region., Mol Microbiol 43(3):687-701

 [9] Browning DF., Grainger DC., Beatty CM., Wolfe AJ., Cole JA., Busby SJ., 2005, Integration of three signals at the Escherichia coli nrf promoter: a role for Fis protein in catabolite repression., Mol Microbiol 57(2):496-510

 [10] Browning DF., Lee DJ., Wolfe AJ., Cole JA., Busby SJ., 2006, The Escherichia coli K-12 NarL and NarP proteins insulate the nrf promoter from the effects of integration host factor., J Bacteriol 188(21):7449-56

 [11] Sclavi B., Beatty CM., Thach DS., Fredericks CE., Buckle M., Wolfe AJ., 2007, The multiple roles of CRP at the complex acs promoter depend on activation region 2 and IHF., Mol Microbiol 65(2):425-40

 [12] Guillier M., Gottesman S., 2006, Remodelling of the Escherichia coli outer membrane by two small regulatory RNAs., Mol Microbiol 59(1):231-47

 [13] Guillier M., Gottesman S., 2008, The 5' end of two redundant sRNAs is involved in the regulation of multiple targets, including their own regulator., Nucleic Acids Res 36(21):6781-94


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