1GME

Crystal structure and assembly of an eukaryotic small heat shock protein

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Crystal Structure and Assembly of an Eukaryotic Small Heat Shock Protein

Van Montfort, R.L.M., Basha, E., Friedrich, K.L., Slingsby, C., Vierling, E.

(2001) Nat Struct Biol 8: 1025

  • DOI: 10.1038/nsb722
  • Primary Citation of Related Structures:  
    1GME

  • PubMed Abstract: 

    • The 2.7 A structure of wheat HSP16.9, a member of the small heat shock proteins (sHSPs), indicates how its alpha-crystallin domain and flanking extensions assemble into a dodecameric double disk. The folding of the monomer and assembly of the oligomer are mutually interdependent, involving strand exchange, helix swapping, loose knots and hinged extensions ...

    The 2.7 A structure of wheat HSP16.9, a member of the small heat shock proteins (sHSPs), indicates how its alpha-crystallin domain and flanking extensions assemble into a dodecameric double disk. The folding of the monomer and assembly of the oligomer are mutually interdependent, involving strand exchange, helix swapping, loose knots and hinged extensions. In support of the chaperone mechanism, the substrate-bound dimers, in temperature-dependent equilibrium with higher assembly forms, have unfolded N-terminal arms and exposed conserved hydrophobic binding sites on the alpha-crystallin domain. The structure also provides a model by which members of the sHSP protein family bind unfolded substrates, which are involved in a variety of neurodegenerative diseases and cataract formation.

    Organizational Affiliation: 

    Department of Crystallography, Birkbeck College, Malet Street, London WC1E 7HX UK.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT SHOCK PROTEIN 16.9BA, B, C, D151Triticum aestivumMutation(s): 0 
Gene Names: hsp16.9B
UniProt
Find proteins for Q41560 (Triticum aestivum)
Explore Q41560 
Go to UniProtKB:  Q41560
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ41560
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.231 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 171.645α = 90
b = 171.645β = 90
c = 124.157γ = 120
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling
SnBphasing
SHARPphasing
SOLOMONphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-11-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Refinement description