1FT9

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 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.Mol.Biol. 7: 876-880

  • DOI: 10.1038/82820

  • 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 struct ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBON MONOXIDE OXIDATION SYSTEM TRANSCRIPTION REGULATOR
A, B
222Rhodospirillum rubrumGene Names: cooA
Find proteins for P72322 (Rhodospirillum rubrum)
Go to UniProtKB:  P72322
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 92.253α = 90.00
b = 92.253β = 90.00
c = 143.723γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
SHARPphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-09
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance