4YZS

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.240 

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:  

  • 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.,Department of Life Sciences, Imperial College, London, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Eukaryotic translation initiation factor 2-alpha kinase 3
A, B
305Homo sapiensMutation(s): 0 
Gene Names: EIF2AK3 (PEK, PERK)
EC: 2.7.11.1
Find proteins for Q9NZJ5 (Homo sapiens)
Go to Gene View: EIF2AK3
Go to UniProtKB:  Q9NZJ5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
W
Query on W

Download SDF File 
Download CCD File 
A, B
TUNGSTEN ION
W
FZFRVZDLZISPFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.240 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 83.900α = 90.00
b = 83.900β = 90.00
c = 186.240γ = 90.00
Software Package:
Software NamePurpose
iMOSFLMdata reduction
Cootmodel building
SCALAdata scaling
SHELXDEphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Author supporting evidence