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: 10.1002/prot.24312
  • Structures With Same Primary Citation

  • 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 proteinA, B124Escherichia coliMutation(s): 0 
Gene Names: immceiE7
Find proteins for Q03708 (Escherichia coli)
Explore Q03708 
Go to UniProtKB:  Q03708
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fab WO2 anti-amyloid-beta antibody Fab fragmentK, L219Mus musculusMutation(s): 0 
Gene Names: IgkcIgk-C
Find proteins for A2NHM3 (Mus musculus)
Explore A2NHM3 
Go to UniProtKB:  A2NHM3
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Im7 immunity proteinF, H228Mus musculusMutation(s): 0 
Gene Names: Ighg
Find proteins for P01863 (Mus musculus)
Explore P01863 
Go to UniProtKB:  P01863
Protein Feature View
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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 

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