4FEI

Hsp17.7 from Deinococcus radiodurans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Alternative bacterial two-component small heat shock protein systems.

Bepperling, A.Alte, F.Kriehuber, T.Braun, N.Weinkauf, S.Groll, M.Haslbeck, M.Buchner, J.

(2012) Proc.Natl.Acad.Sci.USA 109: 20407-20412

  • DOI: 10.1073/pnas.1209565109

  • PubMed Abstract: 
  • Small heat shock proteins (sHsps) are molecular chaperones that prevent the aggregation of nonnative proteins. The sHsps investigated to date mostly form large, oligomeric complexes. The typical bacterial scenario seemed to be a two-component sHsps s ...

    Small heat shock proteins (sHsps) are molecular chaperones that prevent the aggregation of nonnative proteins. The sHsps investigated to date mostly form large, oligomeric complexes. The typical bacterial scenario seemed to be a two-component sHsps system of two homologous sHsps, such as the Escherichia coli sHsps IbpA and IbpB. With a view to expand our knowledge on bacterial sHsps, we analyzed the sHsp system of the bacterium Deinococcus radiodurans, which is resistant against various stress conditions. D. radiodurans encodes two sHsps, termed Hsp17.7 and Hsp20.2. Surprisingly, Hsp17.7 forms only chaperone active dimers, although its crystal structure reveals the typical α-crystallin fold. In contrast, Hsp20.2 is predominantly a 36mer that dissociates into smaller oligomeric assemblies that bind substrate proteins stably. Whereas Hsp20.2 cooperates with the ATP-dependent bacterial chaperones in their refolding, Hsp17.7 keeps substrates in a refolding-competent state by transient interactions. In summary, we show that these two sHsps are strikingly different in their quaternary structures and chaperone properties, defining a second type of bacterial two-component sHsp system.


    Organizational Affiliation

    Department of Chemistry, Center for Integrated Protein Science, Technische Universität München, D-85748 Garching, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein-related protein
A
102Deinococcus radiodurans (strain ATCC 13939 / DSM 20539 / JCM 16871 / LMG 4051 / NBRC 15346 / NCIMB 9279 / R1 / VKM B-1422)Mutation(s): 0 
Find proteins for Q9RTR5 (Deinococcus radiodurans (strain ATCC 13939 / DSM 20539 / JCM 16871 / LMG 4051 / NBRC 15346 / NCIMB 9279 / R1 / VKM B-1422))
Go to UniProtKB:  Q9RTR5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.197 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 51.292α = 90.00
b = 51.292β = 90.00
c = 80.360γ = 120.00
Software Package:
Software NamePurpose
PROTEUM PLUSdata scaling
REFMACrefinement
PHASERphasing
PROTEUM PLUSdata reduction
PROTEUM PLUSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release