3TPK

Crystal structure of the oligomer-specific KW1 antibody fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.143 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis of beta-amyloid oligomer recognition with a conformational antibody fragment.

Morgado, I.Wieligmann, K.Bereza, M.Ronicke, R.Meinhardt, K.Annamalai, K.Baumann, M.Wacker, J.Hortschansky, P.Malesevic, M.Parthier, C.Mawrin, C.Schiene-Fischer, C.Reymann, K.G.Stubbs, M.T.Balbach, J.Gorlach, M.Horn, U.Fandrich, M.

(2012) Proc Natl Acad Sci U S A 109: 12503-12508

  • DOI: 10.1073/pnas.1206433109
  • Primary Citation of Related Structures:  
    3TPK

  • PubMed Abstract: 
  • Oligomers are intermediates of the β-amyloid (Aβ) peptide fibrillogenic pathway and are putative pathogenic culprits in Alzheimer's disease (AD). Here we report the biotechnological generation and biochemical characterization of an oligomer-specific ...

    Oligomers are intermediates of the β-amyloid (Aβ) peptide fibrillogenic pathway and are putative pathogenic culprits in Alzheimer's disease (AD). Here we report the biotechnological generation and biochemical characterization of an oligomer-specific antibody fragment, KW1. KW1 not only discriminates between oligomers and other Aβ conformations, such as fibrils or disaggregated peptide; it also differentiates between different types of Aβ oligomers, such as those formed by Aβ (1-40) and Aβ (1-42) peptide. This high selectivity of binding contrasts sharply with many other conformational antibodies that interact with a large number of structurally analogous but sequentially different antigens. X-ray crystallography, NMR spectroscopy, and peptide array measurements imply that KW1 recognizes oligomers through a hydrophobic and significantly aromatic surface motif that includes Aβ residues 18-20. KW1-positive oligomers occur in human AD brain samples and induce synaptic dysfunctions in living brain tissues. Bivalent KW1 potently neutralizes this effect and interferes with Aβ assembly. By altering a specific step of the fibrillogenic cascade, it prevents the formation of mature Aβ fibrils and induces the accumulation of nonfibrillar aggregates. Our data illuminate significant mechanistic differences in oligomeric and fibril recognition and suggest the considerable potential of KW1 in future studies to detect or inhibit specific types of Aβ conformers.


    Organizational Affiliation

    Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, 06120 Halle, Saale, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Immunoglobulin heavy chain antibody variable domain KW1A136CamelidaeMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BEN
Query on BEN

Download CCD File 
A
BENZAMIDINE
C7 H8 N2
PXXJHWLDUBFPOL-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.143 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.921α = 90
b = 38.659β = 90
c = 94.412γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-11
    Type: Initial release
  • Version 1.1: 2013-11-27
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description