3MOQ

Amyloid beta(18-41) peptide fusion with new antigen receptor variable domain from sharks


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.054 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Amyloid-{beta} p3 Fragment Provides a Model for Oligomer Formation in Alzheimer's Disease

Streltsov, V.A.Varghese, J.N.Masters, C.L.Nuttall, S.D.

(2011) J.Neurosci. 31: 1419-1426

  • DOI: 10.1523/JNEUROSCI.4259-10.2011

  • PubMed Abstract: 
  • Alzheimer's disease is a progressive neurodegenerative disorder associated with the presence of amyloid-β (Aβ) peptide fibrillar plaques in the brain. However, current evidence suggests that soluble nonfibrillar Aβ oligomers may be the major drivers ...

    Alzheimer's disease is a progressive neurodegenerative disorder associated with the presence of amyloid-β (Aβ) peptide fibrillar plaques in the brain. However, current evidence suggests that soluble nonfibrillar Aβ oligomers may be the major drivers of Aβ-mediated synaptic dysfunction. Structural information on these Aβ species has been very limited because of their noncrystalline and unstable nature. Here, we describe a crystal structure of amylogenic residues 18-41 of the Aβ peptide (equivalent to the p3 α/γ-secretase fragment of amyloid precursor protein) presented within the CDR3 loop region of a shark Ig new antigen receptor (IgNAR) single variable domain antibody. The predominant oligomeric species is a tightly associated Aβ dimer, with paired dimers forming a tetramer in the crystal caged within four IgNAR domains, preventing uncontrolled amyloid formation. Our structure correlates with independently observed features of small nonfibrillar Aβ oligomers and reveals conserved elements consistent with residues and motifs predicted as critical in Aβ folding and oligomerization, thus potentially providing a model system for nonfibrillar oligomer formation in Alzheimer's disease.


    Organizational Affiliation

    Commonwealth Scientific and Industrial Research Organization, Parkville, Victoria 3052, Australia. victor.streltsov@csiro.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
New antigen receptor variable domain,P3(40) peptide from Amyloid beta A4 protein,New antigen receptor variable domain
A, B, C, D
126Orectolobus maculatusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: APP (A4, AD1)
Find proteins for Q6X1E6 (Orectolobus maculatus)
Go to UniProtKB:  Q6X1E6
Find proteins for P05067 (Homo sapiens)
Go to Gene View: APP
Go to UniProtKB:  P05067
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.054 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.190 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 79.653α = 90.00
b = 79.653β = 90.00
c = 85.457γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-04-23 
  • Released Date: 2011-02-16 
  • Deposition Author(s): Streltsov, V.A.

Revision History 

  • Version 1.0: 2011-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-06-21
    Type: Database references, Source and taxonomy, Structure summary