3Q9J

AIIFL segment derived from Alzheimer's Amyloid-Beta displayed on 42-membered macrocycle scaffold


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Characteristics of Amyloid-Related Oligomers Revealed by Crystal Structures of Macrocyclic beta-Sheet Mimics.

Liu, C.Sawaya, M.R.Cheng, P.N.Zheng, J.Nowick, J.S.Eisenberg, D.

(2011) J.Am.Chem.Soc. 133: 6736-6744

  • DOI: 10.1021/ja200222n
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein amyloid oligomers have been strongly linked to amyloid diseases and can be intermediates to amyloid fibers. β-Sheets have been identified in amyloid oligomers. However, because of their transient and highly polymorphic properties, the details ...

    Protein amyloid oligomers have been strongly linked to amyloid diseases and can be intermediates to amyloid fibers. β-Sheets have been identified in amyloid oligomers. However, because of their transient and highly polymorphic properties, the details of their self-association remain elusive. Here we explore oligomer structure using a model system: macrocyclic peptides. Key amyloidogenic sequences from Aβ and tau were incorporated into macrocycles, thereby restraining them to β-strands, but limiting the growth of the oligomers so they may crystallize and cannot fibrillate. We determined the atomic structures for four such oligomers, and all four reveal tetrameric interfaces in which β-sheet dimers pair together by highly complementary, dry interfaces, analogous to steric zippers found in fibers, suggesting a common structure for amyloid oligomers and fibers. In amyloid fibers, the axes of the paired sheets are either parallel or antiparallel, whereas the oligomeric interfaces display a variety of sheet-to-sheet pairing angles, offering a structural explanation for the heterogeneity of amyloid oligomers.


    Organizational Affiliation

    UCLA-DOE Institute for Genomics and Proteomics, University of California, Los Angeles, California 90095, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyclic pseudo-peptide AIIFL(ORN)(HAO)YK(ORN)
A, B, C, D, E, F, G, H
10N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, E, F
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
C, D, E, F
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
B, G, H
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
ORN
Query on ORN
A, B, C, D, E, F, G, H
L-PEPTIDE LINKINGC5 H12 N2 O2ALA
HAO
Query on HAO
A, B, C, D, E, F, G, H
peptide-likeC10 H11 N3 O5

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.176 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 41.780α = 90.00
b = 41.780β = 90.00
c = 63.060γ = 120.00
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
XDSdata reduction
BUSTERrefinement
ADSCdata collection
SHELXEmodel building
PDB_EXTRACTdata extraction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance