1FT9

STRUCTURE OF THE REDUCED (FEII) CO-SENSING PROTEIN FROM R. RUBRUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.250 

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This is version 1.3 of the entry. See complete history


Literature

Structure of the CO sensing transcription activator CooA.

Lanzilotta, W.N.Schuller, D.J.Thorsteinsson, M.V.Kerby, R.L.Roberts, G.P.Poulos, T.L.

(2000) Nat Struct Biol 7: 876-880

  • DOI: https://doi.org/10.1038/82820
  • Primary Citation of Related Structures:  
    1FT9

  • PubMed Abstract: 

    CooA is a homodimeric transcription factor that belongs to the catabolite activator protein (CAP) family. Binding of CO to the heme groups of CooA leads to the transcription of genes involved in CO oxidation in Rhodospirillum rubrum. The 2.6 A structure of reduced (Fe2+) CooA reveals that His 77 in both subunits provides one heme ligand while the N-terminal nitrogen of Pro 2 from the opposite subunit provides the other ligand. A structural comparison of CooA in the absence of effector and DNA (off state) with that of CAP in the effector and DNA bound state (on state) leads to a plausible model for the mechanism of allosteric control in this class of proteins as well as the CO dependent activation of CooA.


  • Organizational Affiliation

    Departments of Molecular Biology and Biochemistry and Physiology and Biophysics and the Program in Macromolecular Structure, University of California, Irvine, California 92697-3900, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CARBON MONOXIDE OXIDATION SYSTEM TRANSCRIPTION REGULATOR
A, B
222Rhodospirillum rubrumMutation(s): 0 
UniProt
Find proteins for P72322 (Rhodospirillum rubrum)
Explore P72322 
Go to UniProtKB:  P72322
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP72322
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.250 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.253α = 90
b = 92.253β = 90
c = 143.723γ = 90
Software Package:
Software NamePurpose
SHARPphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-10-09
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations