7CSW

Pseudomonas aeruginosa antitoxin HigA with pa2440 promoter


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report



Literature

Pseudomonas aeruginosa antitoxin HigA functions as a diverse regulatory factor by recognizing specific pseudopalindromic DNA motifs.

Song, Y.Luo, G.Zhu, Y.Li, T.Li, C.He, L.Zhao, N.Zhao, C.Yang, J.Huang, Q.Mu, X.Tang, X.Kang, M.Wu, S.He, Y.Bao, R.

(2020) Environ Microbiol 

  • DOI: 10.1111/1462-2920.15365
  • Primary Citation of Related Structures:  
    7CSY, 7CSW, 7CSV

  • PubMed Abstract: 
  • Type II toxin-antitoxin (TA) systems modulate many essential cellular processes in prokaryotic organisms. Recent studies indicate certain type II antitoxins also transcriptionally regulate other genes, besides neutralizing toxin activity. Herein, we ...

    Type II toxin-antitoxin (TA) systems modulate many essential cellular processes in prokaryotic organisms. Recent studies indicate certain type II antitoxins also transcriptionally regulate other genes, besides neutralizing toxin activity. Herein, we investigated the diverse transcriptional repression properties of type II TA antitoxin PaHigA from Pseudomonas aeruginosa. Biochemical and functional analyses showed that PaHigA recognized variable pseudopalindromic DNA sequences and repressed expression of multiple genes. Furthermore, we presented high resolution structures of apo-PaHigA, PaHigA-P higBA and PaHigA-P pa2440 complex, describing how the rearrangements of the HTH domain accounted for the different DNA-binding patterns among HigA homologues. Moreover, we demonstrated that the N-terminal loop motion of PaHigA was associated with its apo and DNA-bound states, reflecting a switch mechanism regulating HigA antitoxin function. Collectively, this work extends our understanding of how the PaHigB/HigA system regulates multiple metabolic pathways to balance the growth and stress response in P. aeruginosa and could guide further development of anti-TA oriented strategies for pathogen treatment.


    Organizational Affiliation

    Center of Infectious Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, China.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HTH cro/C1-type domain-containing proteinAB101Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: PA4674
Find proteins for Q9HVC1 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HVC1 
Go to UniProtKB:  Q9HVC1
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(P*AP*TP*TP*GP*CP*GP*A)-3')C7Pseudomonas aeruginosa UCBPP-PA14
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(P*TP*CP*GP*C)-3')D4Pseudomonas aeruginosa UCBPP-PA14
      Small Molecules
      Ligands 2 Unique
      IDChainsName / Formula / InChI Key2D Diagram3D Interactions
      DA
      Query on DA

      Download Ideal Coordinates CCD File 
      C
      2'-DEOXYADENOSINE-5'-MONOPHOSPHATE
      C10 H14 N5 O6 P
      KHWCHTKSEGGWEX-RRKCRQDMSA-N
       Ligand Interaction
      DT
      Query on DT

      Download Ideal Coordinates CCD File 
      C
      THYMIDINE-5'-MONOPHOSPHATE
      C10 H15 N2 O8 P
      GYOZYWVXFNDGLU-XLPZGREQSA-N
       Ligand Interaction
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 1.97 Å
      • R-Value Free: 0.234 
      • R-Value Work: 0.197 
      • R-Value Observed: 0.201 
      • Space Group: P 32
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 58.498α = 90
      b = 58.498β = 90
      c = 66.795γ = 120
      Software Package:
      Software NamePurpose
      PHENIXrefinement
      HKL-2000data reduction
      HKL-2000data scaling
      PHENIXphasing

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History 

      • Version 1.0: 2021-01-13
        Type: Initial release