RegulonDB RegulonDB 10.7: Operon Form
   

hypABCDE-fhlA operon and associated TUs in Escherichia coli K-12 genome




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


Transcription unit          
Name: hypABCDE-fhlA
Gene(s): hypA, hypB, hypC, hypD, hypE, fhlA   Genome Browser M3D Gene expression COLOMBOS
Note(s): It has been suggested that sometimes the downstream gene fhlA is transcribed along with the hypABCDE operon genes; however, fhlA has its own promoter (unpublished data |CITS: [1849603]|).
Evidence: [IEP] Inferred from expression pattern
[NAS] Non-traceable author statement
Reference(s): [1] Lutz S., et al., 1991
[2] Schlensog V., et al., 1990
Promoter
Name: hypAp
+1: 2850627
Sigma Factor: Sigma54 Sigmulon
Distance from start of the gene: 20
Sequence: catcgacattattcaccgcagggataatcaacactggcacaattattgcttgtagctggcAatagttaatgggaggcgata
                                   -24         -12          +1                   
Note(s): Based on primer extension hypA and hypB promoters have similar activities Hopper S,1994.
Evidence: [TIM]
Reference(s): [1] Lutz S., et al., 1991
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
remote FhlA-formate activator hypAp 2849869 2849882 -751.5 ctcaggtgatTGTCATTTTTGACGaaaacatgcc nd [APIORCISFBSCS], [BPP], [GEA] [3], [4], [5]
remote FhlA-formate activator hypAp 2849900 2849913 -720.5 gccgatgaaaTGTCATTTTCGACActcatcgaca nd [APIORCISFBSCS], [BPP], [GEA] [3], [4], [5]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote IHF activator hypAp 2850493 2850505 -127.5 tgccaactttTAATTTATTGTTAttaaagagat nd [APIORCISFBSCS], [BPP], [GEA] [3]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote NsrR repressor hypAp 2850526 2850537 -96.0 ttttaagctaAAGATGAATTTCgtcgccgtgt nd [APIORCISFBSCS], [GEA] [6]


Transcription unit          
Name: hypABCDE
Synonym(s): OP00209, hydBEF
Gene(s): hypA, hypB, hypC, hypD, hypE   Genome Browser M3D Gene expression COLOMBOS
Evidence: [BTEI] Boundaries of transcription experimentally identified
[ITC] Inferred through co-regulation
[LTED] Length of transcript experimentally determined
Reference(s): [3] Hopper S., et al., 1994
[1] Lutz S., et al., 1991
Promoter
Name: hypAp
+1: 2850627
Sigma Factor: Sigma54 Sigmulon
Distance from start of the gene: 20
Sequence: catcgacattattcaccgcagggataatcaacactggcacaattattgcttgtagctggcAatagttaatgggaggcgata
                                   -24         -12          +1                   
Note(s): Based on primer extension hypA and hypB promoters have similar activities Hopper S,1994.
Evidence: [TIM]
Reference(s): [1] Lutz S., et al., 1991
Terminator(s)
Type: rho-independent
Sequence: atgaccttttGCACCGCTTTGCGGTGCTttcctggaag
Reference(s): [1] Lutz S., et al., 1991
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
remote FhlA-formate activator hypAp 2849869 2849882 -751.5 ctcaggtgatTGTCATTTTTGACGaaaacatgcc nd [APIORCISFBSCS], [BPP], [GEA] [3], [4], [5]
remote FhlA-formate activator hypAp 2849900 2849913 -720.5 gccgatgaaaTGTCATTTTCGACActcatcgaca nd [APIORCISFBSCS], [BPP], [GEA] [3], [4], [5]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote IHF activator hypAp 2850493 2850505 -127.5 tgccaactttTAATTTATTGTTAttaaagagat nd [APIORCISFBSCS], [BPP], [GEA] [3]
Type Transcription factor Function Promoter Binding Sites Growth Conditions Evidence (Confirmed, Strong, Weak) Reference(s)
LeftPos RightPos Central Rel-Pos Sequence
remote NsrR repressor hypAp 2850526 2850537 -96.0 ttttaagctaAAGATGAATTTCgtcgccgtgt nd [APIORCISFBSCS], [GEA] [6]


Transcription unit          
Name: hypBCDE
Synonym(s): hydBEF
Gene(s): hypB, hypC, hypD, hypE   Genome Browser M3D Gene expression COLOMBOS
Evidence: [BTEI] Boundaries of transcription experimentally identified
[ITC] Inferred through co-regulation
Reference(s): [1] Lutz S., et al., 1991
Promoter
Name: hypBp
+1: 2850839
Distance from start of the gene: 162
Sequence: gccttttgttttgatctggtttgccgcggcagcgtggcggaaggttgtaaactgcacctcGaagaacaagaggccgaatgc
Note(s): This promoter initiates within the hypA gene and is only transcribed under nonfermentative conditions, i.e., when the σ54 hypAp is silent. It facilitates the formation of hydrogenases 1 and 2 under H2 uptake conditions. It is an internal promoter.
Evidence: [RS-EPT-CBR]
[TIM]
Reference(s): [1] Lutz S., et al., 1991
[7] Salgado H, et al., 2012
Terminator(s)
Type: rho-independent
Sequence: atgaccttttGCACCGCTTTGCGGTGCTttcctggaag
Reference(s): [1] Lutz S., et al., 1991
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
remote FNR1 activator hypBp 2850683 2850696 -149.5 ggcactggaaTTGATCGAACAGCAggccgcaaaa nd [BPP], [GEA] [8]
proximal FNR2 activator hypBp 2850789 2850802 -43.5 gccttttgttTTGATCTGGTTTGCcgcggcagcg nd [BCE], [BPP], [GEA] [8]
Note(s): 1FNR activates hypB transcription under anaerobiosis.
2FNR activates hypB transcription under anaerobiosis.1FNR activates hypB transcription under anaerobiosis.
2FNR activates hypB transcription under anaerobiosis.


Transcription unit          
Name: hypBCDE-fhlA
Gene(s): hypB, hypC, hypD, hypE, fhlA   Genome Browser M3D Gene expression COLOMBOS
Note(s): It was suggested that sometimes fhlA is transcribed with the hyp operon. However, this gene is also transcribed from its own promoter (unpublished data of S. Lutz and A. Bock, cited by Lutz, 1991 |CITS: [1849603]|).
Evidence: [IEP] Inferred from expression pattern
[NAS] Non-traceable author statement
Reference(s): [1] Lutz S., et al., 1991
[2] Schlensog V., et al., 1990
Promoter
Name: hypBp
+1: 2850839
Distance from start of the gene: 162
Sequence: gccttttgttttgatctggtttgccgcggcagcgtggcggaaggttgtaaactgcacctcGaagaacaagaggccgaatgc
Note(s): This promoter initiates within the hypA gene and is only transcribed under nonfermentative conditions, i.e., when the σ54 hypAp is silent. It facilitates the formation of hydrogenases 1 and 2 under H2 uptake conditions. It is an internal promoter.
Evidence: [RS-EPT-CBR]
[TIM]
Reference(s): [1] Lutz S., et al., 1991
[7] Salgado H, et al., 2012
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
remote FNR1 activator hypBp 2850683 2850696 -149.5 ggcactggaaTTGATCGAACAGCAggccgcaaaa nd [BPP], [GEA] [8]
proximal FNR2 activator hypBp 2850789 2850802 -43.5 gccttttgttTTGATCTGGTTTGCcgcggcagcg nd [BCE], [BPP], [GEA] [8]
Note(s): 1FNR activates hypB transcription under anaerobiosis.
2FNR activates hypB transcription under anaerobiosis.1FNR activates hypB transcription under anaerobiosis.
2FNR activates hypB transcription under anaerobiosis.


Regulation by sRNA    
  Small RNA name (Regulator) Regulation type Mechanism Function Binding Sites Evidence Reference
LeftPos RightPos Sequence (RNA-strand)
  oxyS antisense translational regulation repressor 2854323 2854329 CCTGGA
  oxyS antisense translational regulation repressor 2854371 2854379 AAGGGTTG
Notes: "The provided sequence is that of the RNA strand,i.e. 'U's are showed instead the 'T'"


RNA cis-regulatory element    
Regulation, transcriptional elongation  
Attenuator type: Translational
Strand: forward
Evidence: [ICA] Inferred by computational analysis
Reference(s): [9] Merino E, et al., 2005
  Structure type Energy LeftPos RightPos Sequence (RNA-strand)
  terminator -12.3 2854298 2854328 agtcaatgacCTTTTGCACCGCTTTGCGGTGCTTTCCTGGaagaacaaaa
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"




Reference(s)    

 [1] Lutz S., Jacobi A., Schlensog V., Bohm R., Sawers G., Bock A., 1991, Molecular characterization of an operon (hyp) necessary for the activity of the three hydrogenase isoenzymes in Escherichia coli., Mol Microbiol 5(1):123-35

 [2] Schlensog V., Bock A., 1990, Identification and sequence analysis of the gene encoding the transcriptional activator of the formate hydrogenlyase system of Escherichia coli., Mol Microbiol 4(8):1319-27

 [3] Hopper S., Babst M., Schlensog V., Fischer HM., Hennecke H., Bock A., 1994, Regulated expression in vitro of genes coding for formate hydrogenlyase components of Escherichia coli., J Biol Chem 269(30):19597-604

 [4] Leonhartsberger S., Ehrenreich A., Bock A., 2000, Analysis of the domain structure and the DNA binding site of the transcriptional activator FhlA., Eur J Biochem 267(12):3672-84

 [5] Schlensog V., Lutz S., Bock A., 1994, Purification and DNA-binding properties of FHLA, the transcriptional activator of the formate hydrogenlyase system from Escherichia coli., J Biol Chem 269(30):19590-6

 [6] Partridge JD., Bodenmiller DM., Humphrys MS., Spiro S., 2009, NsrR targets in the Escherichia coli genome: new insights into DNA sequence requirements for binding and a role for NsrR in the regulation of motility., Mol Microbiol 73(4):680-94

 [7] Salgado H, Peralta-Gil M, Gama-Castro S, Santos-Zavaleta A, Muñiz-Rascado L, García-Sotelo JS, Weiss V, Solano-Lira H, Martínez-Flores I, Medina-Rivera A, Salgado-Osorio G, Alquicira-Hernández S, Alquicira-Hernández K, López-Fuentes A, Porrón-Sotelo L, Huerta AM, Bonavides-Martínez C, Balderas-Martínez YI, Pannier L, Olvera M, Labastida A, Jiménez-Jacinto V, Vega-Alvarado L, Del Moral-Chávez V, Hernández-Alvarez A, Morett E, Collado-Vides J., 2012, RegulonDB v8.0: omics data sets, evolutionary conservation, regulatory phrases, cross-validated gold standards and more., Nucleic Acids Res.

 [8] Messenger SL., Green J., 2003, FNR-mediated regulation of hyp expression in Escherichia coli., FEMS Microbiol Lett 228(1):81-6

 [9] Merino E, Yanofsky C., 2005, Transcription attenuation: a highly conserved regulatory strategy used by bacteria., Trends Genet. 2005 May;21(5):260-4.


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