Structure of autoinhibited p47phox

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

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Molecular basis of phosphorylation-induced activation of the NADPH oxidase

Groemping, Y.Lapouge, K.Smerdon, S.J.Rittinger, K.

(2003) Cell 113: 343-355

  • DOI: https://doi.org/10.1016/s0092-8674(03)00314-3
  • Primary Citation of Related Structures:  
    1NG2, 1OV3

  • PubMed Abstract: 

    The multi-subunit NADPH oxidase complex plays a crucial role in host defense against microbial infection through the production of reactive oxygen species. Activation of the NADPH oxidase requires the targeting of a cytoplasmic p40-p47-p67(phox) complex to the membrane bound heterodimeric p22-gp91(phox) flavocytochrome. This interaction is prevented in the resting state due to an auto-inhibited conformation of p47(phox). The X-ray structure of the auto-inhibited form of p47(phox) reveals that tandem SH3 domains function together to maintain the cytoplasmic complex in an inactive form. Further structural and biochemical data show that phosphorylation of p47(phox) activates a molecular switch that relieves the inhibitory intramolecular interaction. This permits p47(phox) to interact with the cytoplasmic tail of p22(phox) and initiate formation of the active, membrane bound enzyme complex.

  • Organizational Affiliation

    Division of Protein Structure, National Institute for Medical Research, Mill Hill, London NW7 1AA, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Neutrophil cytosolic factor 1193Homo sapiensMutation(s): 0 
Gene Names: NCF1
UniProt & NIH Common Fund Data Resources
Find proteins for P14598 (Homo sapiens)
Explore P14598 
Go to UniProtKB:  P14598
PHAROS:  P14598
GTEx:  ENSG00000158517 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14598
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 99.986α = 90
b = 99.986β = 90
c = 44.875γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-05-20
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2022-12-21
    Changes: Database references
  • Version 1.4: 2024-05-22
    Changes: Data collection