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X-ray crystallographic structure of an Abeta 17-36 beta-hairpin. LV(PHI)FAEDCGSNKCAII(SAR)L(ORN)V


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.295 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray Crystallographic Structures of a Trimer, Dodecamer, and Annular Pore Formed by an A beta 17-36 beta-Hairpin.

Kreutzer, A.G.Hamza, I.L.Spencer, R.K.Nowick, J.S.

(2016) J.Am.Chem.Soc. 138: 4634-4642

  • DOI: 10.1021/jacs.6b01332
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • High-resolution structures of oligomers formed by the β-amyloid peptide Aβ are needed to understand the molecular basis of Alzheimer's disease and develop therapies. This paper presents the X-ray crystallographic structures of oligomers formed by a 2 ...

    High-resolution structures of oligomers formed by the β-amyloid peptide Aβ are needed to understand the molecular basis of Alzheimer's disease and develop therapies. This paper presents the X-ray crystallographic structures of oligomers formed by a 20-residue peptide segment derived from Aβ. The development of a peptide in which Aβ17-36 is stabilized as a β-hairpin is described, and the X-ray crystallographic structures of oligomers it forms are reported. Two covalent constraints act in tandem to stabilize the Aβ17-36 peptide in a hairpin conformation: a δ-linked ornithine turn connecting positions 17 and 36 to create a macrocycle and an intramolecular disulfide linkage between positions 24 and 29. An N-methyl group at position 33 blocks uncontrolled aggregation. The peptide readily crystallizes as a folded β-hairpin, which assembles hierarchically in the crystal lattice. Three β-hairpin monomers assemble to form a triangular trimer, four trimers assemble in a tetrahedral arrangement to form a dodecamer, and five dodecamers pack together to form an annular pore. This hierarchical assembly provides a model, in which full-length Aβ transitions from an unfolded monomer to a folded β-hairpin, which assembles to form oligomers that further pack to form an annular pore. This model may provide a better understanding of the molecular basis of Alzheimer's disease at atomic resolution.


    Organizational Affiliation

    Department of Chemistry, University of California, Irvine , Irvine, California 92697-2025, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amyloid beta A4 protein
A, B, C, D, E, F
21Homo 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
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
SAR
Query on SAR
A, B, C, D, E, F
PEPTIDE LINKINGC3 H7 N O2GLY
ORN
Query on ORN
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H12 N2 O2ALA
PHI
Query on PHI
A, B, C, D, E, F
L-PEPTIDE LINKINGC9 H10 I N O2PHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.295 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.234 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 97.310α = 90.00
b = 97.310β = 90.00
c = 97.621γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM097562

Revision History 

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2016-04-20
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Author supporting evidence, Derived calculations