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MraZ DNA-binding transcriptional repressor

Synonyms: MraZ
Summary:
MraZ is a transcriptional repressor involved in the control of cell division and cell wall genes |CITS: [24659771]|. Based on differential gene expression analysis comparing the WT to a mraZ mutant, 100 genes under the control of MraZ were identified |CITS: [24659771]|. The analysis showed that three successive TGGGN direct repeats are separated by two consecutive 5-nt spacers |CITS: [24659771]|.
The MraZ protein is highly conserved in bacteria |CITS: [15146477][15362108][11226588]|, and MraW is more universal |CITS: [24659771]|. MraZ is similar in both structure and sequence to the DNA-binding transition-state regulator AbrB from Bacillus subtilis |CITS: [15939023][16223496]|. A preliminary analysis of the crystal structure of MraZ has been published |CITS: [16511046]|.
It was previously suggested that MraZ is an inhibitor of the RsmH methyltransferase |CITS: [20924196]|, but this report has since been retracted |CITS: [21196765]|.
A mraZ null mutation has been generated |CITS: [12142427]|. A mraZ deletion mutant is more sensitive to nalidixic acid and kasugamycin than the wild type |CITS: [23308060]|.
Based on a comparison of a stationary-phase mraZ null mutant cells and WT cells, it was shown that 2% of the genes in the genome are differentially regulated. Overproduction of MraZ during the early logarithmic phase showed that 23% of the genes were differentially regulated |CITS:[24659771]|.
MraZ overproduction is lethal and perturbs cell division |CITS:[24659771]|.
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Transcription factor      
TF conformation(s):
Name Conformation Type TF-Effector Interaction Type Apo/Holo Conformation Evidence (Confirmed, Strong, Weak) References
MraZ     nd nd
Connectivity class: Local Regulator
Gene name: mraZ
  Genome position: 89634-90092
  Length: 459 bp / 152 aa
Operon name: mraZ-rsmH-ftsLI-murEF-mraY-murD-ftsW-murGC-ddlB-ftsQAZ-lpxC
TU(s) encoding the TF:
Transcription unit        Promoter
mraZ-rsmH-ftsLI-murEF-mraY-murD-ftsW-murGC-ddlB-ftsQAZ-lpxC
mraZp


Regulon       
Regulated gene(s) ddlB, ftsA, ftsI, ftsL, ftsQ, ftsW, ftsZ, lpxC, mioC, mraY, mraZ, murC, murD, murE, murF, murG, rsmH
Multifun term(s) of regulated gene(s) MultiFun Term (List of genes associated to the multifun term)
murein (peptidoglycan) (8)
murein (8)
cell division (7)
membrane (4)
drug resistance/sensitivity (1)
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Regulated operon(s) asnC-mioC-mnmG-rsmG, mraZ-rsmH-ftsLI-murEF-mraY-murD-ftsW-murGC-ddlB-ftsQAZ-lpxC
First gene in the operon(s) mioC, mraZ
Simple and complex regulons MraZ
MraZ,PdhR
Simple and complex regulatory phrases Regulatory phrase (List of promoters regulated by the phrase)
[MraZ,-](2)


Transcription factor binding sites (TFBSs) arrangements       

  Functional conformation Function Promoter Sigma factor Central Rel-Pos Distance to first Gene Genes Sequence LeftPos RightPos Evidence (Confirmed, Strong, Weak) References
  MraZ repressor mioCp nd -54.0 -74.0 mioC
gcttttttaaTCCCAtacttttcca
3926527 3926531 [BPP], [GEA] [1]
  MraZ repressor mioCp nd -44.0 -64.0 mioC
tcccatacttTTCCAcaggtagatc
3926517 3926521 [AIBSCS], [BPP], [GEA] [1]
  MraZ repressor mioCp nd -31.0 -51.0 mioC
cacaggtagaTCCCAacgcgttcac
3926504 3926508 [AIBSCS], [BPP], [GEA] [1]
  MraZ repressor mraZp Sigma70 -3.0 -41.0 mraZ, rsmH, ftsL, ftsI, murE, murF, mraY, murD, ftsW, murG, murC, ddlB, ftsQ, ftsA, ftsZ, lpxC
ctcctttcagTGGGAaattgtgggg
89591 89595 [AIBSCS], [BPP], [GEA], [SM] [1]
  MraZ repressor mraZp Sigma70 8.0 -31.0 mraZ, rsmH, ftsL, ftsI, murE, murF, mraY, murD, ftsW, murG, murC, ddlB, ftsQ, ftsA, ftsZ, lpxC
tgggaaattgTGGGGcaaagtggga
89601 89605 [AIBSCS], [BPP], [GEA], [SM] [1]
  MraZ repressor mraZp Sigma70 18.0 -21.0 mraZ, rsmH, ftsL, ftsI, murE, murF, mraY, murD, ftsW, murG, murC, ddlB, ftsQ, ftsA, ftsZ, lpxC
tggggcaaagTGGGAataaggggtg
89611 89615 [AIBSCS], [BPP], [GEA], [SM] [1]


Alignment and PSSM for MraZ TFBSs    

Aligned TFBS of MraZ   
  Sequence
 

Position weight matrix (PWM).   
A	1	0	0	0	1	4	4	3
C	0	0	0	0	0	0	1	0
G	5	0	5	6	5	2	0	0
T	0	6	1	0	0	0	1	3

PWM logo   


 


Evolutionary conservation of regulatory elements    
     Note: Evolutionary conservation of regulatory interactions and promoters is limited to gammaproteobacteria.
Promoter-target gene evolutionary conservation


Evidence    

 [BPP] Binding of purified proteins

 [GEA] Gene expression analysis

 [AIBSCS] Automated inference based on similarity to consensus sequences

 [SM] Site mutation



Reference(s)    

 [1] Eraso JM., Markillie LM., Mitchell HD., Taylor RC., Orr G., Margolin W., 2014, The Highly Conserved MraZ Protein Is a Transcriptional Regulator in Escherichia coli., J Bacteriol. 196(11):2053-66



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