4YZY

Crystal structures reveal transient PERK luminal domain tetramerization in ER stress signaling


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.290 
  • R-Value Observed: 0.291 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structures reveal transient PERK luminal domain tetramerization in endoplasmic reticulum stress signaling.

Carrara, M.Prischi, F.Nowak, P.R.Ali, M.M.

(2015) EMBO J 34: 1589-1600

  • DOI: 10.15252/embj.201489183
  • Primary Citation of Related Structures:  
    4YZS, 4YZY

  • PubMed Abstract: 
  • Stress caused by accumulation of misfolded proteins within the endoplasmic reticulum (ER) elicits a cellular unfolded protein response (UPR) aimed at maintaining protein-folding capacity. PERK, a key upstream component, recognizes ER stress via its l ...

    Stress caused by accumulation of misfolded proteins within the endoplasmic reticulum (ER) elicits a cellular unfolded protein response (UPR) aimed at maintaining protein-folding capacity. PERK, a key upstream component, recognizes ER stress via its luminal sensor/transducer domain, but the molecular events that lead to UPR activation remain unclear. Here, we describe the crystal structures of mammalian PERK luminal domains captured in dimeric state as well as in a novel tetrameric state. Small angle X-ray scattering analysis (SAXS) supports the existence of both crystal structures also in solution. The salient feature of the tetramer interface, a helix swapped between dimers, implies transient association. Moreover, interface mutations that disrupt tetramer formation in vitro reduce phosphorylation of PERK and its target eIF2α in cells. These results suggest that transient conversion from dimeric to tetrameric state may be a key regulatory step in UPR activation.


    Organizational Affiliation

    Department of Life Sciences, Imperial College, London, UK maruf.ali@imperial.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Eukaryotic translation initiation factor 2-alpha kinase 3A301Mus musculusMutation(s): 0 
Gene Names: Eif2ak3PekPerk
EC: 2.7.11.1
Find proteins for Q9Z2B5 (Mus musculus)
Explore Q9Z2B5 
Go to UniProtKB:  Q9Z2B5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.290 
  • R-Value Observed: 0.291 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.77α = 90
b = 90.77β = 90
c = 75.22γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
SCALAdata scaling
Cootmodel building
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC33269/A11161
Medical Research Council (United Kingdom)United KingdomMR/L007436/1

Revision History 

  • Version 1.0: 2015-05-13
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence