RegulonDB RegulonDB 10.8: Operon Form

motAB-cheAW operon and associated TUs in Escherichia coli K-12 genome

Name: motAB-cheAW
This page displays every known transcription unit of this operon and their known regulation.

Transcription unit          
Name: motAB-cheAW
Gene(s): cheW, cheA, motB, motA   Genome Browser M3D Gene expression COLOMBOS
Note(s): The CpxR-dependent expression of the motAB-cheAW operon is diminished under the stress condition caused by the introduction of the R1-16 plasmid, which encodes the type IV secretion system (T4S machinery) in the cell Zahrl D,2006
The mRNA produced by the motAB-cheAW operon has been observed mainly in the poles of the cell 31540875.
In a study where it was shown that the L-tryptophan eradicated persister cells, it was observed that the exogenous amino acid downregulated the expression of motAB as well as other flagellar genes 31271063.
Reference(s): [1] Mirel DB., et al., 1992
[2] Silverman M., et al., 1977
Name: motAp
+1: 1977302
Sigma Factor: Sigma28 Sigmulon
Distance from start of the gene: 163
Sequence: accgccatcccgggcagtaaaaagacgtaaactttcccagaatcctgccgatattatcccAcaactgctggatgaacagag
                            -35                -10          +1                   
Note(s): The sequence of this promoter has been defined, by computational analyses, from the consensus sequence of the σ28F) promoters TAAAGTTT in the -35 box and GCCGATAA in the -10 box Park K,2001. Ko M,2000. Ide N,1999. Therefore, we assigned a putative transcription start site for this promoter based on the observation that the majority of the σ28 promoters, determined experimentally, present an important -10 motif (5'-CGA-3') at the positions -12 to -10 and a distance of 6 nucleotides between the transcription start site and the -10 box 16855242. Yu HH,2006. Park K,2001
The motAp promoter is an intragenic promoter controlled by FliA, which is inside the flhC gene. The FliA promoter within the flhC gene constrains evolution of the FlhC amino acid sequence. 29476659 Although FlhC has two amino acids (Ala177 and Asp178) overlapping the -10 region, which are highly conserved among γ-proteobacteria, Asp178 is not required for FlhC function 29476659 The Ala-Asp motif is conserved due to selective pressure on the motA promoter, rather than on the amino acids themselves 29476659
motAp, the promoter within the flhC gene, is the most highly conserved of all FliA promoters 29476659
Evidence: [HIPP]
Reference(s): [3] Ide N., et al., 1999
[4] Ko M., et al., 2000
[5] Park K., et al., 2001
Type: rho-independent
Reference(s): [6] Feng CQ., et al., 2019
[7] Lesnik EA., et al., 2001
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 CpxR-Phosphorylated repressor motAp 1977332 1977346 -37.0 atcccgggcaGTAAAAAGACGTAAActttcccaga nd [BPP], [GEA] [8], [9]

RNA cis-regulatory element    
Regulation, transcriptional elongation  
Attenuator type: Transcriptional
Strand: reverse
  Structure type Energy LeftPos RightPos Sequence (RNA-strand)
  terminator -16.7 1977207 1977240 gcaacattccAGCAGCGGTAACGACGTACCGCTGCTTTTTTTTgccccaatcg
  anti-terminator -5.6 1977232 1977274 gagagtacagGCTGTTTAACTGATACGGTGAGGCGCAACATTCCAGCAGCGGtaacgacgta
  anti-anti-terminator -10.6 1977252 1977305 ccgatattatCCCACAACTGCTGGATGAACAGAGAGTACAGGCTGTTTAACTGATACGGTGAGgcgcaacatt
Notes: "The provided "Sequence" is that of the RNA strand, i.e. U's are shown instead of T's and regulators on the reverse strand will appear as the reverse complement of the sequence delimited by LeftPos-RigtPos"


 [1] Mirel DB., Lustre VM., Chamberlin MJ., 1992, An operon of Bacillus subtilis motility genes transcribed by the sigma D form of RNA polymerase., J Bacteriol 174(13):4197-204

 [2] Silverman M., Simon M., 1977, Identification of polypeptides necessary for chemotaxis in Escherichia coli., J Bacteriol 130(3):1317-25

 [3] Ide N., Ikebe T., Kutsukake K., 1999, Reevaluation of the promoter structure of the class 3 flagellar operons of Escherichia coli and Salmonella., Genes Genet Syst 74(3):113-6

 [4] Ko M., Park C., 2000, Two novel flagellar components and H-NS are involved in the motor function of Escherichia coli., J Mol Biol 303(3):371-82

 [5] Park K., Choi S., Ko M., Park C., 2001, Novel sigmaF-dependent genes of Escherichia coli found using a specified promoter consensus., FEMS Microbiol Lett 202(2):243-50

 [6] Feng CQ., Zhang ZY., Zhu XJ., Lin Y., Chen W., Tang H., Lin H., 2019, iTerm-PseKNC: a sequence-based tool for predicting bacterial transcriptional terminators., Bioinformatics 35(9):1469-1477

 [7] Lesnik EA., Sampath R., Levene HB., Henderson TJ., McNeil JA., Ecker DJ., 2001, Prediction of rho-independent transcriptional terminators in Escherichia coli., Nucleic Acids Res 29(17):3583-94

 [8] De Wulf P., Kwon O., Lin EC., 1999, The CpxRA signal transduction system of Escherichia coli: growth-related autoactivation and control of unanticipated target operons., J Bacteriol 181(21):6772-8

 [9] De Wulf P., McGuire AM., Liu X., Lin EC., 2002, Genome-wide profiling of promoter recognition by the two-component response regulator CpxR-P in Escherichia coli., J Biol Chem 277(29):26652-61