1UEC

Crystal structure of autoinhibited form of tandem SH3 domain of p47phox


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A molecular mechanism for autoinhibition of the tandem SH3 domains of p47phox, the regulatory subunit of the phagocyte NADPH oxidase

Yuzawa, S.Suzuki, N.N.Fujioka, Y.Ogura, K.Sumimoto, H.Inagaki, F.

(2004) Genes Cells 9: 443-456

  • DOI: 10.1111/j.1356-9597.2004.00733.x

  • PubMed Abstract: 
  • The phagocyte NADPH oxidase is a multisubunit enzyme responsible for the production of reactive oxygen species. p47(phox) is a cytosolic component of the NADPH oxidase and plays an important role in the assembly of the activated complex. The structur ...

    The phagocyte NADPH oxidase is a multisubunit enzyme responsible for the production of reactive oxygen species. p47(phox) is a cytosolic component of the NADPH oxidase and plays an important role in the assembly of the activated complex. The structural determination of the tandem SH3 domains of p47(phox) is crucial for elucidation of the molecular mechanism of the activation of p47(phox). We determined the X-ray crystal structure of the tandem SH3 domains with the polybasic/autoinhibitory region (PBR/AIR) of p47(phox). The GAPPR sequence involved in PBR/AIR forms a left-handed polyproline type-II helix (PPII) and interacts with the conserved SH3 binding surfaces of the SH3 domains simultaneously. These SH3 domains are related by a 2-fold pseudosymmetry axis at the centre of the binding groove and interact with the single PPII helix formed by the GAPPR sequence with opposite orientation. In addition, a number of intra-molecular interactions among the SH3 domains, PBR/AIR and the linker tightly hold the architecture of the tandem SH3 domains into the compact structure and stabilize the autoinhibited form synergistically. Phosphorylation of the serine residues in PBR/AIR could destabilize and successively release the intra-molecular interactions. Thus, the overall structure could be rearranged from the autoinhibitory conformation to the active conformation and the PPII ligand binding surfaces on the SH3 domains are now unmasked, which enables their interaction with the target sequence in p22(phox).


    Organizational Affiliation

    Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neutrophil cytosol factor 1
A
193Homo sapiensMutation(s): 0 
Gene Names: NCF1 (NOXO2, SH3PXD1A)
Find proteins for P14598 (Homo sapiens)
Go to Gene View: NCF1
Go to UniProtKB:  P14598
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.82 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.213 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 100.217α = 90.00
b = 100.217β = 90.00
c = 44.924γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance