5DS1

Core domain of the class II small heat-shock protein HSP 17.7 from Pisum sativum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.237 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural principles that enable oligomeric small heat-shock protein paralogs to evolve distinct functions.

Hochberg, G.K.A.Shepherd, D.A.Marklund, E.G.Santhanagoplan, I.Degiacomi, M.T.Laganowsky, A.Allison, T.M.Basha, E.Marty, M.T.Galpin, M.R.Struwe, W.B.Baldwin, A.J.Vierling, E.Benesch, J.L.P.

(2018) Science 359: 930-935

  • DOI: 10.1126/science.aam7229
  • Primary Citation of Related Structures:  
    5DS1, 5DS2

  • PubMed Abstract: 
  • Oligomeric proteins assemble with exceptional selectivity, even in the presence of closely related proteins, to perform their cellular roles. We show that most proteins related by gene duplication of an oligomeric ancestor have evolved to avoid hetero-oligomerization and that this correlates with their acquisition of distinct functions ...

    Oligomeric proteins assemble with exceptional selectivity, even in the presence of closely related proteins, to perform their cellular roles. We show that most proteins related by gene duplication of an oligomeric ancestor have evolved to avoid hetero-oligomerization and that this correlates with their acquisition of distinct functions. We report how coassembly is avoided by two oligomeric small heat-shock protein paralogs. A hierarchy of assembly, involving intermediates that are populated only fleetingly at equilibrium, ensures selective oligomerization. Conformational flexibility at noninterfacial regions in the monomers prevents coassembly, allowing interfaces to remain largely conserved. Homomeric oligomers must overcome the entropic benefit of coassembly and, accordingly, homomeric paralogs comprise fewer subunits than homomers that have no paralogs.


    Organizational Affiliation

    Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3QZ, UK. justin.benesch@chem.ox.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
17.1 kDa class II heat shock proteinA, B, C95Pisum sativumMutation(s): 0 
Gene Names: HSP17.7
UniProt
Find proteins for P19242 (Pisum sativum)
Explore P19242 
Go to UniProtKB:  P19242
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.237 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.86α = 90
b = 82.69β = 92.11
c = 88.9γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-09-28
    Type: Initial release
  • Version 1.1: 2020-03-04
    Changes: Database references