4F1R

Structure analysis of the global metabolic regulator Crc from Pseudomonas aeruginos


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.201 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


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Literature

Structure analysis of the global metabolic regulator Crc from Pseudomonas aeruginosa.

Wei, Y.Zhang, H.Gao, Z.Q.Xu, J.H.Liu, Q.S.Dong, Y.H.

(2013) Iubmb Life 65: 50-57

  • DOI: 10.1002/iub.1103

  • PubMed Abstract: 
  • The global metabolic regulator catabolite repression control (Crc) has recently been found to modulate the susceptibility to antibiotics and virulence in the opportunistic pathogen Pseudomonas aeruginosa and been suggested as a nonlethal target for n ...

    The global metabolic regulator catabolite repression control (Crc) has recently been found to modulate the susceptibility to antibiotics and virulence in the opportunistic pathogen Pseudomonas aeruginosa and been suggested as a nonlethal target for novel antimicrobials. In P. aeruginosa, Crc couples with the CA motifs from the small RNA CrcZ to form a post-transcriptional regulator system and is removed from the 5'-end of the target mRNAs. In this study, we first reported the crystal structure of Crc from P. aeruginosa refined to 2.20 Å. The structure showed that it consists of two halves with similar overall topology and there are 11 β strands surrounded by 13 helices, forming a four-layered α/β-sandwich. The circular dichroism spectroscopy revealed that it is thermostable in solution and shares similar characteristics to that in crystal. Comprehensive structural analysis and comparison with the homologies of Crc showed high similarity with several known nucleases and consequently may be classified into a member exodeoxyribonuclease III. However, it shows distinct substrate specificity (RNA as the preferred substrate) compared to these DNA endonucleases. Structural comparisons also revealed potential RNA recognition and binding region mainly consisting of five flexible loops. Our structure study provided the basis for the future application of Crc as a target to develop new antibiotics.


    Organizational Affiliation

    School of Life Sciences, University of Science and Technology of China, Hefei, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catabolite repression control protein
A
293Pseudomonas aeruginosaGene Names: crc (exoA, exoA_2)
EC: 3.1.11.2
Find proteins for Q51380 (Pseudomonas aeruginosa)
Go to UniProtKB:  Q51380
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.201 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.202 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 74.299α = 90.00
b = 74.299β = 90.00
c = 123.575γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
Blu-Icedata collection
PHASERphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-06
    Type: Initial release