6OIZ

Amyloid-Beta (20-34) wild type


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.10 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of amyloid-beta (20-34) with Alzheimer's-associated isomerization at Asp23 reveals a distinct protofilament interface.

Warmack, R.A.Boyer, D.R.Zee, C.T.Richards, L.S.Sawaya, M.R.Cascio, D.Gonen, T.Eisenberg, D.S.Clarke, S.G.

(2019) Nat Commun 10: 3357-3357

  • DOI: 10.1038/s41467-019-11183-z
  • Primary Citation of Related Structures:  
    6NB9, 6OIZ

  • PubMed Abstract: 
  • Amyloid-β (Aβ) harbors numerous posttranslational modifications (PTMs) that may affect Alzheimer's disease (AD) pathogenesis. Here we present the 1.1 Å resolution MicroED structure of an Aβ 20-34 fibril with and without the disease-associated PTM, L-isoaspartate, at position 23 (L-isoAsp23) ...

    Amyloid-β (Aβ) harbors numerous posttranslational modifications (PTMs) that may affect Alzheimer's disease (AD) pathogenesis. Here we present the 1.1 Å resolution MicroED structure of an Aβ 20-34 fibril with and without the disease-associated PTM, L-isoaspartate, at position 23 (L-isoAsp23). Both wild-type and L-isoAsp23 protofilaments adopt β-helix-like folds with tightly packed cores, resembling the cores of full-length fibrillar Aβ structures, and both self-associate through two distinct interfaces. One of these is a unique Aβ interface strengthened by the isoaspartyl modification. Powder diffraction patterns suggest a similar structure may be adopted by protofilaments of an analogous segment containing the heritable Iowa mutation, Asp23Asn. Consistent with its early onset phenotype in patients, Asp23Asn accelerates aggregation of Aβ 20-34, as does the L-isoAsp23 modification. These structures suggest that the enhanced amyloidogenicity of the modified Aβ segments may also reduce the concentration required to achieve nucleation and therefore help spur the pathogenesis of AD.


    Organizational Affiliation

    Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, 90095-1570, USA. clarke@mbi.ucla.edu.



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Amyloid beta A4 proteinA15Homo sapiensMutation(s): 0 
Gene Names: APPA4AD1
UniProt & NIH Common Fund Data Resources
Find proteins for P05067 (Homo sapiens)
Explore P05067 
Go to UniProtKB:  P05067
PHAROS:  P05067
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05067
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.10 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.17α = 90
b = 4.78β = 111.1
c = 30.33γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
SHELXDphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United States5T32GM008496
National Science Foundation (NSF, United States)United StatesMCB-1714569
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesGM-007185
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-07
    Type: Initial release
  • Version 1.1: 2019-11-20
    Changes: Author supporting evidence
  • Version 1.2: 2022-09-07
    Changes: Data collection, Database references