Small heat shock protein hsp14.0 with the mutations of I120F and I122F in the form I crystal

Experimental Data Snapshot

  • Resolution: 1.85 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.228 

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Dimer structure and conformational variability in the N-terminal region of an archaeal small heat shock protein, StHsp14.0

Takeda, K.Hayashi, T.Abe, T.Hirano, Y.Hanazono, Y.Yohda, M.Miki, K.

(2011) J Struct Biol 174: 92-99

  • DOI: https://doi.org/10.1016/j.jsb.2010.12.006
  • Primary Citation of Related Structures:  
    3AAB, 3AAC

  • PubMed Abstract: 

    Small heat shock proteins (sHsps), which are categorized into a class of molecular chaperones, bind and stabilize denatured proteins to prevent aggregation. The sHsps undergo transition between different oligomeric states to control their hydrophobicity. So far, only the structures of sHsps in large oligomeric states have been reported. Here we report the structure of StHsp14.0 from Sulfolobus tokodaii in the dimeric state, which is formed by means of a mutation at the C-terminal IXI/V motif. The dimer is the sole building block in two crystal forms, and the dimeric mode is the same as that in the large oligomers. The N-terminal helix has variety in its conformation. Furthermore, spectroscopic and biochemical experiments were performed to investigate the conformational variability at the N-terminus. The structural, dynamical and oligomeric properties suggest that chaperone activity of StHsp14.0 is mediated by partially dissolved oligomers.

  • Organizational Affiliation

    Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative uncharacterized protein ST1653
A, B
123Sulfurisphaera tokodaii str. 7Mutation(s): 2 
Gene Names: ST1653
Find proteins for Q970D9 (Sulfurisphaera tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7))
Explore Q970D9 
Go to UniProtKB:  Q970D9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ970D9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.85 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.228 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.366α = 90
b = 61.096β = 90
c = 96.136γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2011-12-07
    Changes: Database references
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references, Derived calculations