3KTM

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 

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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 U S A 107: 5381-5386

  • DOI: 10.1073/pnas.0911326107
  • Primary Citation of Related Structures:  
    3KTM

  • 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-terminal APP-E1 domain consisting of the growth factor like and the copper binding domains at 2 ...

    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: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Amyloid beta A4 protein A, B, C, D, E, F, G, H191Homo sapiensMutation(s): 0 
Gene Names: APP, A4, AD1
Find proteins for P05067 (Homo sapiens)
Explore P05067 
Go to UniProtKB:  P05067
NIH Common Fund Data Resources
PHAROS:  P05067
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 143.99α = 90
b = 143.99β = 90
c = 351.19γ = 120
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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