3MXC

Structures of Grb2-SH2 Domain and AICD peptide Complexes Reveal a Conformational Switch and Their Functional Implications.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Functional Implications of the Conformational Switch in AICD Peptide upon Binding to Grb2-SH2 Domain.

Das, S.Raychaudhuri, M.Sen, U.Mukhopadhyay, D.

(2011) J.Mol.Biol. 414: 217-230

  • DOI: 10.1016/j.jmb.2011.09.046
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • It has been hypothesized previously that synergistic effect of both amyloid precursor protein intracellular C-terminal domain (AICD) and Aβ aggregation could contribute to Alzheimer's disease pathogenesis. Structural studies of AICD have found no sta ...

    It has been hypothesized previously that synergistic effect of both amyloid precursor protein intracellular C-terminal domain (AICD) and Aβ aggregation could contribute to Alzheimer's disease pathogenesis. Structural studies of AICD have found no stable globular fold over a broad range of pH. Present work is based on the premises that a conformational switch involving the flipping of C-terminal helix of AICD would be essential for effective binding with the Src homology 2 (SH2) domain of growth factor receptor binding protein-2 (Grb2) and subsequent initiation of Grb2-mediated endo-lysosomal pathway. High-resolution crystal structures of Grb2-SH2 domain bound to AICD peptides reveal a unique mode of binding where the peptides assume a noncanonical conformation that is unlike other structures of AICD peptides bound to protein-tyrosine-binding domains or that of its free state; rather, a flipping of the C-terminal helix of AICD is evident. The involvement of different AICD residues in Grb2-SH2 interaction is further elucidated through fluorescence-based assays. Our results reveal the significance of a specific interaction of the two molecules to optimize the rapid transport of AICD inside endosomal vesicles presumably to reduce the cytotoxic load.


    Organizational Affiliation

    Structural Genomics Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, WB, Kolkata 700 064, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Growth factor receptor-bound protein 2
A
101Homo sapiensMutation(s): 0 
Gene Names: GRB2 (ASH)
Find proteins for P62993 (Homo sapiens)
Go to Gene View: GRB2
Go to UniProtKB:  P62993
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AICD peptide
L
9Homo sapiensMutation(s): 0 
Gene Names: APP (A4, AD1)
Find proteins for P05067 (Homo sapiens)
Go to Gene View: APP
Go to UniProtKB:  P05067
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
L
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.217 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 59.369α = 90.00
b = 59.369β = 90.00
c = 117.101γ = 120.00
Software Package:
Software NamePurpose
MAR345dtbdata collection
AMoREphasing
CNSrefinement
AUTOMARdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-05-07 
  • Released Date: 2011-05-11 
  • Deposition Author(s): Sen, U., Das, S.

Revision History 

  • Version 1.0: 2011-05-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-10-12
    Type: Database references
  • Version 1.3: 2011-11-02
    Type: Database references
  • Version 1.4: 2011-12-14
    Type: Database references