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 
  • R-Value Observed: 0.226 

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: https://doi.org/10.1002/prot.24312
  • Primary Citation of Related Structures:  
    4F37

  • 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 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
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Colicin-E7 immunity protein
A, B
124Escherichia coliMutation(s): 0 
UniProt
Find proteins for Q03708 (Escherichia coli)
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Go to UniProtKB:  Q03708
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UniProt GroupQ03708
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Im7 immunity proteinC [auth F],
D [auth H]
228Mus musculusMutation(s): 0 
UniProt
Find proteins for P01863 (Mus musculus)
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UniProt GroupP01863
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Fab WO2 anti-amyloid-beta antibody Fab fragmentE [auth K],
F [auth L]
219Mus musculusMutation(s): 0 
UniProt
Find proteins for A2NHM3 (Mus musculus)
Explore A2NHM3 
Go to UniProtKB:  A2NHM3
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UniProt GroupA2NHM3
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.57 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.226 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.642α = 90.05
b = 82.836β = 92.51
c = 89.196γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASESphasing
REFMACrefinement
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: 2013-05-15
    Type: Initial release
  • Version 1.1: 2014-09-03
    Changes: Database references