2AK5

beta PIX-SH3 complexed with a Cbl-b peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cbl promotes clustering of endocytic adaptor proteins.

Jozic, D.Cardenes, N.Deribe, Y.L.Moncalian, G.Hoeller, D.Groemping, Y.Dikic, I.Rittinger, K.Bravo, J.

(2005) Nat Struct Mol Biol 12: 972-979

  • DOI: 10.1038/nsmb1000
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The ubiquitin ligases c-Cbl and Cbl-b play a crucial role in receptor downregulation by mediating multiple monoubiquitination of receptors and promoting their sorting for lysosomal degradation. Their function is modulated through interactions with re ...

    The ubiquitin ligases c-Cbl and Cbl-b play a crucial role in receptor downregulation by mediating multiple monoubiquitination of receptors and promoting their sorting for lysosomal degradation. Their function is modulated through interactions with regulatory proteins including CIN85 and PIX, which recognize a proline-arginine motif in Cbl and thus promote or inhibit receptor endocytosis. We report the structures of SH3 domains of CIN85 and beta-PIX in complex with a proline-arginine peptide from Cbl-b. Both structures reveal a heterotrimeric complex containing two SH3 domains held together by a single peptide. Trimerization also occurs in solution and is facilitated by the pseudo-symmetrical peptide sequence. Moreover, ternary complexes of CIN85 and Cbl are formed in vivo and are important for the ability of Cbl to promote epidermal growth factor receptor (EGFR) downregulation. These results provide molecular explanations for a novel mechanism by which Cbl controls receptor downregulation.


    Organizational Affiliation

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



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rho guanine nucleotide exchange factor 7
A, B
64Rattus norvegicusMutation(s): 0 
Gene Names: Arhgef7Pak3bpPixb
Find proteins for O55043 (Rattus norvegicus)
Go to UniProtKB:  O55043
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
8-residue peptide from a signal transduction protein CBL-B
D
8N/AMutation(s): 0 
Find proteins for Q13191 (Homo sapiens)
Go to UniProtKB:  Q13191
NIH Common Fund Data Resources
PHAROS  Q13191
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.220 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.338α = 90
b = 69.338β = 90
c = 58.113γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-10-11
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance