4DCQ

Crystal Structure of the Fab Fragment of 3B5H10, an Antibody-Specific for Extended Polyglutamine Repeats (orthorhombic form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Disease-associated polyglutamine stretches in monomeric huntingtin adopt a compact structure.

Peters-Libeu, C.Miller, J.Rutenber, E.Newhouse, Y.Krishnan, P.Cheung, K.Hatters, D.Brooks, E.Widjaja, K.Tran, T.Mitra, S.Arrasate, M.Mosquera, L.A.Taylor, D.Weisgraber, K.H.Finkbeiner, S.

(2012) J.Mol.Biol. 421: 587-600

  • DOI: 10.1016/j.jmb.2012.01.034
  • Primary Citation of Related Structures:  3S96

  • PubMed Abstract: 
  • Abnormal polyglutamine (polyQ) tracts are the only common feature in nine proteins that each cause a dominant neurodegenerative disorder. In Huntington's disease, tracts longer than 36 glutamines in the protein huntingtin (htt) cause degeneration. In ...

    Abnormal polyglutamine (polyQ) tracts are the only common feature in nine proteins that each cause a dominant neurodegenerative disorder. In Huntington's disease, tracts longer than 36 glutamines in the protein huntingtin (htt) cause degeneration. In situ, monoclonal antibody 3B5H10 binds to different htt fragments in neurons in proportion to their toxicity. Here, we determined the structure of 3B5H10 Fab to 1.9 Å resolution by X-ray crystallography. Modeling demonstrates that the paratope forms a groove suitable for binding two β-rich polyQ strands. Using small-angle X-ray scattering, we confirmed that the polyQ epitope recognized by 3B5H10 is a compact two-stranded hairpin within monomeric htt and is abundant in htt fragments unbound to antibody. Thus, disease-associated polyQ stretches preferentially adopt compact conformations. Since 3B5H10 binding predicts degeneration, this compact polyQ structure may be neurotoxic.


    Organizational Affiliation

    Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
3B5H10 FAB Light Chain
A
218N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
3B5H10 FAB Heavy Chain
B
218N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.94 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 78.068α = 90.00
b = 121.815β = 90.00
c = 42.012γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
MOSFLMdata reduction
PDB_EXTRACTdata extraction
PHASERphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-22
    Type: Initial release
  • Version 1.1: 2012-08-08
    Type: Database references