4F37

Structure of the tethered N-terminus of Alzheimer's disease A peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural studies of the tethered N-terminus of the Alzheimer's disease amyloid-beta peptide.

Nisbet, R.M.Nuttall, S.D.Robert, R.Caine, J.M.Dolezal, O.Hattarki, M.Pearce, L.A.Davydova, N.Masters, C.L.Varghese, J.N.Streltsov, V.A.

(2013) Proteins 81: 1748-1758

  • DOI: 10.1002/prot.24312

  • PubMed Abstract: 
  • Alzheimer's disease is the most common form of dementia in humans and is related to the accumulation of the amyloid-β (Aβ) peptide and its interaction with metals (Cu, Fe, and Zn) in the brain. Crystallographic structural information about Aβ peptide ...

    Alzheimer's disease is the most common form of dementia in humans and is related to the accumulation of the amyloid-β (Aβ) peptide and its interaction with metals (Cu, Fe, and Zn) in the brain. Crystallographic structural information about Aβ peptide deposits and the details of the metal-binding site is limited owing to the heterogeneous nature of aggregation states formed by the peptide. Here, we present a crystal structure of Aβ residues 1-16 fused to the N-terminus of the Escherichia coli immunity protein Im7, and stabilized with the fragment antigen binding fragment of the anti-Aβ N-terminal antibody WO2. The structure demonstrates that Aβ residues 10-16, which are not in complex with the antibody, adopt a mixture of local polyproline II-helix and turn type conformations, enhancing cooperativity between the two adjacent histidine residues His13 and His14. Furthermore, this relatively rigid region of Aβ (residues, 10-16) appear as an almost independent unit available for trapping metal ions and provides a rationale for the His13-metal-His14 coordination in the Aβ1-16 fragment implicated in Aβ metal binding. This novel structure, therefore, has the potential to provide a foundation for investigating the effect of metal ion binding to Aβ and illustrates a potential target for the development of future Alzheimer's disease therapeutics aimed at stabilizing the N-terminal monomer structure, in particular residues His13 and His14, and preventing Aβ metal-binding-induced neurotoxicity.


    Organizational Affiliation

    Materials Science and Engineering & Preventative Health Flagship, CSIRO, Parkville, Victoria, 3052, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Colicin-E7 immunity protein
A, B
124Escherichia coliMutation(s): 0 
Gene Names: imm (ceiE7)
Find proteins for Q03708 (Escherichia coli)
Go to UniProtKB:  Q03708
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Im7 immunity protein
F, H
228Mus musculusMutation(s): 0 
Gene Names: Ighg
Find proteins for P01863 (Mus musculus)
Go to UniProtKB:  P01863
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab WO2 anti-amyloid-beta antibody Fab fragment
K, L
219Mus musculusMutation(s): 0 
Gene Names: Igkc (Igk-C)
Find proteins for A2NHM3 (Mus musculus)
Go to UniProtKB:  A2NHM3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.223 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 36.642α = 90.05
b = 82.836β = 92.51
c = 89.196γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASESphasing
HKL-2000data scaling
REFMACrefinement
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-15
    Type: Initial release
  • Version 1.1: 2014-09-03
    Type: Database references