1NG2 | pdb_00001ng2

Structure of autoinhibited p47phox

• PDB DOI: https://doi.org/10.2210/pdb1NG2/pdb

• Classification: Oxidoreductase activator
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2002-12-16 Released: 2003-05-20 
• Deposition Author(s): Groemping, Y., Lapouge, K., Smerdon, S.J., Rittinger, K.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.233 (Depositor) 
• R-Value Work: 
  0.206 (Depositor) 
• R-Value Observed: 
  0.208 (Depositor) 

Literature

Molecular basis of phosphorylation-induced activation of the NADPH oxidase

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

(2003) Cell 113: 343-355

• PubMed: 12732142 
• DOI: https://doi.org/10.1016/s0092-8674(03)00314-3
• Primary Citation 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.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA,PQS (software)

Macromolecule Content 

• Total Structure Weight: 22.06 kDa 
• Atom Count: 1,564 
• Modeled Residue Count: 176 
• Deposited Residue Count: 193 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Neutrophil cytosolic factor 1	A	193	Homo sapiens	Mutation(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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.233 (Depositor) 
• R-Value Work:  0.206 (Depositor) 
• R-Value Observed: 0.208 (Depositor) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 99.986	α = 90
b = 99.986	β = 90
c = 44.875	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-05-20 
Deposition Author(s): Groemping, Y., Lapouge, K., Smerdon, S.J., Rittinger, K.

Revision History  

• 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