3S96

Crystal structure of 3B5H10


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.187 

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
  • Structures With Same Primary Citation

  • 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 heavy chainA, C220Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
3B5H10 FAB light chainB, D218Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.26α = 90
b = 78.25β = 90.23
c = 123.62γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-15
    Type: Initial release
  • Version 1.1: 2012-08-08
    Changes: Database references