3KTM

Structure of the Heparin-induced E1-Dimer of the Amyloid Precursor Protein (APP)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and biochemical analysis of the heparin-induced E1 dimer of the amyloid precursor protein.

Dahms, S.O.Hoefgen, S.Roeser, D.Schlott, B.Guhrs, K.H.Than, M.E.

(2010) Proc.Natl.Acad.Sci.USA 107: 5381-5386

  • DOI: 10.1073/pnas.0911326107

  • PubMed Abstract: 
  • The amyloid precursor protein (APP) is the key player in Alzheimer's disease pathology, yet APP and its analogues are also essential for neuronal development and cell homeostasis in mammals. We have determined the crystal structure of the entire N-te ...

    The amyloid precursor protein (APP) is the key player in Alzheimer's disease pathology, yet APP and its analogues are also essential for neuronal development and cell homeostasis in mammals. We have determined the crystal structure of the entire N-terminal APP-E1 domain consisting of the growth factor like and the copper binding domains at 2.7-A resolution and show that E1 functions as a rigid functional entity. The two subdomains interact tightly in a pH-dependent manner via an evolutionarily conserved interface area. Two E1 entities dimerize upon their interaction with heparin, requiring 8-12 sugar rings to form the heparin-bridged APP-E1 dimer in an endothermic and pH-dependent process that is characterized by a low micromolar dissociation constant. Limited proteolysis confirms that the heparin-bridged E1 dimers obtained in solution correspond to a dimer contact in our crystal, enabling us to model this heparin-[APP-E1](2) complex. Correspondingly, the APP-based signal transduction, cell-cell- and/or cell-ECM interaction should depend on dimerization induced by heparin, as well as on pH, arguing that APP could fulfill different functions depending on its (sub)cellular localization.


    Organizational Affiliation

    Leibniz Institute for Age Research-Fritz Lipman Institute, Protein Crystallography Group, Jena, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amyloid beta A4 protein
A, B, C, D, E, F, G, H
191Homo 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
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, C, D, E, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
B, C, E, H
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
BU4
Query on BU4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
(3R)-butane-1,3-diol
C4 H10 O2
PUPZLCDOIYMWBV-SCSAIBSYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 143.990α = 90.00
b = 143.990β = 90.00
c = 351.190γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
CNSrefinement
PHASERphasing
MxCuBEdata collection
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance