1W70

SH3 domain of p40phox complexed with C-terminal polyProline region of p47phox

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.46 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 

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This is version 1.4 of the entry. See complete history. 


Literature

Effects of P47Phox C-Terminus Phosphorylation on Binding Interactions with P40Phox and P67Phox: Structural and Functional Comparison of P40Phox P67Phox SH3 Domains

Massenet, C., Chenavas, S., Cohen-Addad, C., Dagher, M.-C., Brandolin, G., Pebay-Peyroula, E., Fieschi, F.

(2005) J Biol Chem 280: 13752

  • DOI: 10.1074/jbc.M412897200
  • Primary Citation of Related Structures:  
    1W70, 1W6X

  • PubMed Abstract: 

    • The neutrophil NADPH oxidase produces superoxide anions in response to infection. This reaction is activated by association of cytosolic factors, p47phox and p67phox, and a small G protein Rac with the membranous flavocytochrome b558. Another cytosolic factor, p40phox, is associated to the complex and is reported to play regulatory roles ...

    The neutrophil NADPH oxidase produces superoxide anions in response to infection. This reaction is activated by association of cytosolic factors, p47phox and p67phox, and a small G protein Rac with the membranous flavocytochrome b558. Another cytosolic factor, p40phox, is associated to the complex and is reported to play regulatory roles. Initiation of the NADPH oxidase activation cascade has been reported as consecutive to phosphorylation on serines 359/370 and 379 of the p47phox C terminus. These serines surround a polyproline motif that can interact with the Src homology 3 (SH3) module of p40phox (SH3p40) or the C-terminal SH3 of p67phox (C-SH3p67). The latter one presents a higher affinity in the resting state for p47phox. A change in SH3 binding preference following phosphorylation has been postulated earlier. Here we report the crystal structures of SH3p40 alone or in complex with a 12-residue proline-rich region of p47phox at 1.46 angstrom resolution. Using intrinsic tryptophan fluorescence measurements, we compared the affinity of the strict polyproline motif and the whole C terminus peptide with both SH3p40 and C-SH3p67. These data reveal that SH3p40 can interact with a consensus polyproline motif but also with a noncanonical motif of the p47phox C terminus. The electrostatic surfaces of both SH3 are very different, and therefore the binding preference for C-SH3p67 can be attributed to the polyproline motif recognition and particularly to the Arg-368p47 binding mode. The noncanonical motif contributes equally to interaction with both SH3. The influence of serine phosphorylation on residues 359/370 and 379 on the affinity for both SH3 domains has been checked. We conclude that contrarily to previous suggestions, phosphorylation of Ser-359/370 does not modify the SH3 binding affinity for both SH3, whereas phosphorylation of Ser-379 has a destabilizing effect on both interactions. Other mechanisms than a phosphorylation induced switch between the two SH3 must therefore take place for NADPH oxidase activation cascade to start.

    Organizational Affiliation: 

    Institut de Biologie Structurale, UMR 5075 CEA/CNRS/Université Joseph Fourier, Laboratoire des Protéines Membranaires, 41 rue Jules Horowitz 38027 Grenoble cedex 1, France.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NEUTROPHIL CYTOSOL FACTOR 4A, B60Homo sapiensMutation(s): 0 
Gene Names: NCF4, SH3PXD4
UniProt & NIH Common Fund Data Resources
Find proteins for Q15080 (Homo sapiens)
Explore Q15080 
Go to UniProtKB:  Q15080
PHAROS:  Q15080
GTEx:  ENSG00000100365
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NEUTROPHIL CYTOSOL FACTOR 1C, D14Homo sapiensMutation(s): 0 
Gene Names: NCF1, NOXO2, SH3PXD1A
UniProt & NIH Common Fund Data Resources
Find proteins for P14598 (Homo sapiens)
Explore P14598 
Go to UniProtKB:  P14598
PHAROS:  P14598
GTEx:  ENSG00000158517
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.46 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.64α = 90
b = 50.49β = 90
c = 68.18γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
CCP4data scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-18
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-03-06
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 1.4: 2019-05-22
    Changes: Data collection, Experimental preparation