2LZ4

Solution NMR structure of transmembrane domain of amyloid precursor protein V44M


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Familial Alzheimer's mutations within APPTM increase A beta 42 production by enhancing accessibility of epsilon-cleavage site.

Chen, W.Gamache, E.Rosenman, D.J.Xie, J.Lopez, M.M.Li, Y.M.Wang, C.

(2014) Nat Commun 5: 3037-3037

  • DOI: 10.1038/ncomms4037
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The high Aβ42/Aβ40 production ratio is a hallmark of familial Alzheimer's disease, which can be caused by mutations in the amyloid precursor protein (APP). The C-terminus of Aβ is generated by γ-secretase cleavage within the transmembrane domain of A ...

    The high Aβ42/Aβ40 production ratio is a hallmark of familial Alzheimer's disease, which can be caused by mutations in the amyloid precursor protein (APP). The C-terminus of Aβ is generated by γ-secretase cleavage within the transmembrane domain of APP (APPTM), a process that is primed by an initial ε-cleavage at either T48 or L49, resulting in subsequent production of Aβ42 or Aβ40, respectively. Here we solve the dimer structures of wild-type APPTM (AAPTM WT) and mutant APPTM (FAD mutants V44M) with solution NMR. The right-handed APPTM helical dimer is mediated by GXXXA motif. From the NMR structural and dynamic data, we show that the V44M and V44A mutations can selectively expose the T48 site by weakening helical hydrogen bonds and increasing hydrogen-deuterium exchange rate (kex). We propose a structural model in which FAD mutations (V44M and V44A) can open the T48 site γ-secretase for the initial ε-cleavage, and consequently shift cleavage preference towards Aβ42.


    Related Citations: 
    • Expression, purification, and reconstitution of the transmembrane domain of the human amyloid precursor protein for NMR studies.
      Chen, W.,Gamache, E.,Richardson, D.,Du, Z.,Wang, C.
      (2012) Protein Expr.Purif. 81: 11


    Organizational Affiliation

    Department of Biological Sciences, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amyloid beta A4 protein
A, B
31Homo sapiensMutation(s): 1 
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: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-09-23 
  • Released Date: 2013-10-02 
  • Deposition Author(s): Chen, W., Wang, C.

Revision History 

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2013-12-18
    Type: Database references
  • Version 1.2: 2014-02-05
    Type: Database references
  • Version 1.3: 2016-04-27
    Type: Structure summary