5VOS

VGSNKGAIIGL from Amyloid Beta determined by MicroED


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.42 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 

wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Common fibrillar spines of amyloid-beta and human islet amyloid polypeptide revealed by microelectron diffraction and structure-based inhibitors.

Krotee, P.Griner, S.L.Sawaya, M.R.Cascio, D.Rodriguez, J.A.Shi, D.Philipp, S.Murray, K.Saelices, L.Lee, J.Seidler, P.Glabe, C.G.Jiang, L.Gonen, T.Eisenberg, D.S.

(2018) J Biol Chem 293: 2888-2902

  • DOI: 10.1074/jbc.M117.806109
  • Primary Citation of Related Structures:  
    5VOS

  • PubMed Abstract: 
  • Amyloid-β (Aβ) and human islet amyloid polypeptide (hIAPP) aggregate to form amyloid fibrils that deposit in tissues and are associated with Alzheimer's disease (AD) and type II diabetes (T2D), respectively. Individuals with T2D have an increased risk of developing AD, and conversely, AD patients have an increased risk of developing T2D ...

    Amyloid-β (Aβ) and human islet amyloid polypeptide (hIAPP) aggregate to form amyloid fibrils that deposit in tissues and are associated with Alzheimer's disease (AD) and type II diabetes (T2D), respectively. Individuals with T2D have an increased risk of developing AD, and conversely, AD patients have an increased risk of developing T2D. Evidence suggests that this link between AD and T2D might originate from a structural similarity between aggregates of Aβ and hIAPP. Using the cryoEM method microelectron diffraction, we determined the atomic structures of 11-residue segments from both Aβ and hIAPP, termed Aβ(24-34) WT and hIAPP(19-29) S20G, with 64% sequence similarity. We observed a high degree of structural similarity between their backbone atoms (0.96-Å root mean square deviation). Moreover, fibrils of these segments induced amyloid formation through self- and cross-seeding. Furthermore, inhibitors designed for one segment showed cross-efficacy for full-length Aβ and hIAPP and reduced cytotoxicity of both proteins, although by apparently blocking different cytotoxic mechanisms. The similarity of the atomic structures of Aβ(24-34) WT and hIAPP(19-29) S20G offers a molecular model for cross-seeding between Aβ and hIAPP.


    Organizational Affiliation

    From the Howard Hughes Medical Institute, UCLA-United States Department of Energy (DOE) Institute, Departments of Biological Chemistry and Chemistry and Biochemistry, Molecular Biology Institute, UCLA, Los Angeles, California 90095, david@mbi.ucla.edu.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Amyloid beta A4 proteinA11Homo 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 1.42 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 18.78α = 90
b = 4.73β = 100.02
c = 33.47γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-03
    Type: Initial release
  • Version 1.1: 2018-01-10
    Changes: Database references
  • Version 1.2: 2018-03-07
    Changes: Database references
  • Version 1.3: 2018-04-25
    Changes: Data collection
  • Version 1.4: 2018-06-06
    Changes: Data collection, Refinement description
  • Version 1.5: 2019-11-20
    Changes: Author supporting evidence
  • Version 1.6: 2021-06-30
    Changes: Data collection