3SUZ

Crystal structure of Rat Mint2 PPC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.265 
  • R-Value Observed: 0.265 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 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: https://doi.org/10.1093/jmcb/mjs033
  • Primary Citation of Related Structures:  
    3SUZ, 3SV1

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Amyloid beta A4 precursor protein-binding family A member 2388Rattus norvegicusMutation(s): 0 
Gene Names: Mint2
UniProt
Find proteins for O35431 (Rattus norvegicus)
Explore O35431 
Go to UniProtKB:  O35431
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO35431
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.265 
  • R-Value Observed: 0.265 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.662α = 90
b = 111.662β = 90
c = 84.586γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-07-11
    Type: Initial release
  • Version 1.1: 2013-06-19
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Refinement description