RegulonDB RegulonDB 10.8: Operon Form
   

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




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


Transcription unit       
Name: xapB
Gene(s): xapB   Genome Browser M3D Gene expression COLOMBOS
Evidence: [IEP] Inferred from expression pattern
Reference(s): [1] Li Z., et al., 2019
Promoter
Name: xapBp
+1: 2524251
Sigma Factor: Sigma70 Sigmulon
Distance from start of the gene: 266
Sequence: tcgtatccggggccgaatttcgagactgcggcggaaattcgcatgatgcaaattattggtGgggatgttgttggtatgtct
                      -35                          -10      +1                   
Evidence: [RE]
[TIM]
Reference(s): [1] Li Z., et al., 2019


Transcription unit       
Name: xapB
Gene(s): xapB   Genome Browser M3D Gene expression COLOMBOS
Evidence: [IEP] Inferred from expression pattern
Reference(s): [1] Li Z., et al., 2019
Promoter
Name: xapBp2
+1: 2524303
Sigma Factor: Sigma70 Sigmulon
Distance from start of the gene: 318
Sequence: acaaaaagtggcgaaagaagagggtttccctctgacggagggcgtgttcgtctcgtatccGgggccgaatttcgagactgc
                                                   -10      +1                   
Evidence: [RE]
[TIM]
Reference(s): [1] Li Z., et al., 2019
Terminator(s)
Type: rho-independent
Sequence: tatcataaaaGCAGCTCTGAAGAGCAGAGCCGCgaatcctttt


Transcription unit       
Name: xapB
Gene(s): xapB   Genome Browser M3D Gene expression COLOMBOS
Evidence: [IEP] Inferred from expression pattern
Reference(s): [1] Li Z., et al., 2019
Promoter
Name: xapBp3
+1: 2524375
Sigma Factor: Sigma54 Sigmulon
Distance from start of the gene: 390
Sequence: taacgatgatcgttttggagagcgcttcttctcactggcaaatgcctacgatgcggaataCcgcgcactgttacaaaaagt
                                    -24         -12         +1                   
Evidence: [RE]
[TIM]
Reference(s): [1] Li Z., et al., 2019
Terminator(s)
Type: rho-independent
Sequence: tatcataaaaGCAGCTCTGAAGAGCAGAGCCGCgaatcctttt


Transcription unit          
Name: xapAB
Gene(s): xapB, xapA   Genome Browser M3D Gene expression COLOMBOS
Evidence: [BTEI] Boundaries of transcription experimentally identified
[ITC] Inferred through co-regulation
[PM] Polar mutation
Reference(s): [2] Maciag A., et al., 2011
[3] Seeger C., et al., 1995
Promoter
Name: xapAp
+1: 2524910
Sigma Factor: Sigma70, Sigma38
Distance from start of the gene: 32
Sequence: tattgaatgcgtgagaaaagtgtattggtaagagccgggacaacctcgctataaaaaggcGttagattccaccctacagaa
                         -35                      -10       +1                   
Evidence: [HIPP]
[TIM]
Reference(s): [3] Seeger C., et al., 1995
Terminator(s)
Type: rho-independent
Sequence: tatcataaaaGCAGCTCTGAAGAGCAGAGCCGCgaatcctttt
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 XapR-xanthosine activator xapAp 2524943 2524955 -39.0 aatgcgtgagAAAAGTGTATTGGtaagagccgg nd [APIORCISFBSCS], [CV(GEA)], [GEA] [3], [4]
remote XapR-xanthosine activator xapAp 2525023 2525035 -119.0 ggaattaataTCGCCAATACAGTttttaccgtg nd [APIORCISFBSCS], [CV(GEA)], [GEA] [3], [4]


RNA cis-regulatory element    
Regulation, transcriptional elongation  
Attenuator type: Translational
Strand: reverse
  Structure type Energy LeftPos RightPos Sequence (RNA-strand)
  terminator -11.8 2524010 2524027 aataagaaacGGCCTCGCGGGTGAGGCcaaatgatgc
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"





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