OCPA complexed CprK

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

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Molecular basis of halorespiration control by CprK, a CRP-FNR type transcriptional regulator

Levy, C.Pike, K.Heyes, D.J.Joyce, M.G.Gabor, K.Smidt, H.van der Oost, J.Leys, D.

(2008) Mol Microbiol 70: 151-167

  • DOI: https://doi.org/10.1111/j.1365-2958.2008.06399.x
  • Primary Citation of Related Structures:  
    3E5Q, 3E5U, 3E5X, 3E6B, 3E6C, 3E6D

  • PubMed Abstract: 

    Certain bacteria are able to conserve energy via the reductive dehalogenation of halo-organic compounds in a respiration-type metabolism. The transcriptional regulator CprK from Desulfitobacterium spp. induces expression of halorespiratory genes upon binding of o-chlorophenol ligands and is reversibly inactivated by oxygen through disulphide bond formation. We report crystal structures of D. hafniense CprK in the ligand-free (both oxidation states), ligand-bound (reduced) and DNA-bound states, making it the first member of the widespread CRP-FNR superfamily for which a complete structural description of both redox-dependent and allosteric molecular rearrangements is available. In conjunction with kinetic and thermodynamic ligand binding studies, we provide a model for the allosteric mechanisms underpinning transcriptional control. Amino acids that play a key role in this mechanism are not conserved in functionally distinct CRP-FNR members. This suggests that, despite significant structural homology, distinct allosteric mechanisms are used, enabling this protein family to control a very wide range of processes.

  • Organizational Affiliation

    Manchester Interdisciplinary Biocentre, The University of Manchester, Manchester M1 7DN, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclic nucleotide-binding proteinA,
B [auth C],
C [auth B],
250Desulfitobacterium hafniense DCB-2Mutation(s): 0 
Gene Names: Dhaf_0678
Find proteins for B8FW11 (Desulfitobacterium hafniense (strain DSM 10664 / DCB-2))
Explore B8FW11 
Go to UniProtKB:  B8FW11
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB8FW11
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.7α = 90
b = 118.38β = 95.68
c = 87.46γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2008-12-09 
  • Deposition Author(s): Levy, C.

Revision History  (Full details and data files)

  • Version 1.0: 2008-12-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations