3SV1

Crystal structure of APP peptide bound rat Mint2 PARM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Open-closed motion of Mint2 regulates APP metabolism

Xie, X.Yan, X.Wang, Z.Zhou, H.Diao, W.Zhou, W.Long, J.Shen, Y.

(2013) J Mol Cell Biol 5: 48-56

  • DOI: 10.1093/jmcb/mjs033
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The amyloid-β protein precursor (APP) plays a crucial role in the pathogenesis of Alzheimer's disease (AD). Knock-out and transgenic mouse studies of the adaptor protein Mint2 have revealed that it is a major player in regulating APP metabolism physi ...

    The amyloid-β protein precursor (APP) plays a crucial role in the pathogenesis of Alzheimer's disease (AD). Knock-out and transgenic mouse studies of the adaptor protein Mint2 have revealed that it is a major player in regulating APP metabolism physiologically through the binding of its phosphotyrosine-binding (PTB) domain to the intracellular domain of APP. However, the molecular mechanism of APP dynamically binding to Mint2 remains elusive. Here, we report the structures of APP peptide-free and APP peptide-bound C-terminal Mint2 mutants at resolutions of 2.7 and 3.3 Å, respectively. Our structures reveal that APP peptide-free Mint2 exists in a closed state in which the ARM domain blocks the peptide-binding groove of the PTB domain. In sharp contrast, APP peptide-bound Mint2 exists in an open state in which the ARM domain drastically swings away from the bound peptide. Mutants that control the open-closed motion of Mint2 dynamically regulated APP metabolism both in vitro and in vivo. Our results uncover a novel open-closed mechanism of the PTB domain dynamically binding to its peptide substrate. Moreover, such a conformational switch may represent a general regulation mode of APP family members by Mint proteins, providing useful information for the treatment of AD.


    Organizational Affiliation

    State Key Laboratory of Medicinal Chemical Biology, Nankai University, 94 Weijin Road, Tianjin 300071, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amyloid beta A4 precursor protein-binding family A member 2
A, B, C
190Rattus norvegicusMutation(s): 0 
Gene Names: Apba2 (Mint2)
Find proteins for O35431 (Rattus norvegicus)
Go to UniProtKB:  O35431
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Amyloid beta A4 protein
D, E, F
14Homo sapiensMutation(s): 0 
Gene Names: APP (A4, AD1)
Find proteins for P05067 (Homo sapiens)
Go to Gene View: APP
Go to UniProtKB:  P05067
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.301 
  • R-Value Work: 0.243 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 151.119α = 90.00
b = 52.092β = 127.80
c = 121.282γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
PHASERphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-11
    Type: Initial release
  • Version 1.1: 2013-06-19
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Refinement description