8D9X

Cryo-EM structure of human DELE1 in oligomeric form

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

DELE1 oligomerization promotes integrated stress response activation.

Yang, J., Baron, K.R., Pride, D.E., Schneemann, A., Guo, X., Chen, W., Song, A.S., Aviles, G., Kampmann, M., Luke Wiseman, R., Lander, G.C.

(2023) Nat Struct Mol Biol 30: 1295-1302

  • DOI: https://doi.org/10.1038/s41594-023-01061-0
  • Primary Citation of Related Structures:  
    8D9X

  • PubMed Abstract: 

    • Mitochondria are dynamic organelles that continually respond to cellular stress. Recent studies have demonstrated that mitochondrial stress is relayed from mitochondria to the cytosol by the release of a proteolytic fragment of DELE1 that binds to the eIF2α kinase HRI to initiate integrated stress response (ISR) signaling ...

    Mitochondria are dynamic organelles that continually respond to cellular stress. Recent studies have demonstrated that mitochondrial stress is relayed from mitochondria to the cytosol by the release of a proteolytic fragment of DELE1 that binds to the eIF2α kinase HRI to initiate integrated stress response (ISR) signaling. We report the cryo-electron microscopy structure of the C-terminal cleavage product of human DELE1, which assembles into a high-order oligomer. The oligomer consists of eight DELE1 monomers that assemble with D 4 symmetry via two sets of hydrophobic inter-subunit interactions. We identified the key residues involved in DELE1 oligomerization, and confirmed their role in stabilizing the octamer in vitro and in cells using mutagenesis. We further show that assembly-impaired DELE1 mutants are compromised in their ability to induce HRI-dependent ISR activation in cell culture models. Together, our findings provide molecular insights into the activity of DELE1 and how it signals to promote ISR activity following mitochondrial insult.

    Organizational Affiliation: 

    Department of Integrative Structural and Computational Biology, Scripps Research, La Jolla, CA, USA. glander@scripps.edu.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Maltodextrin-binding protein,DAP3-binding cell death enhancer 1 short form
A, B, C, D, E
A, B, C, D, E, F, G, H
675Homo sapiensMutation(s): 0 
Gene Names: malE, GUB92_19955, NCTC8450_00456, NCTC9775_03059, DELE1, DELE, KIAA0141
UniProt & NIH Common Fund Data Resources
Find proteins for A0A376KDN7 (Escherichia coli)
Explore A0A376KDN7 
Go to UniProtKB:  A0A376KDN7
Find proteins for Q14154 (Homo sapiens)
Explore Q14154 
Go to UniProtKB:  Q14154
PHAROS:  Q14154
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ14154A0A376KDN7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC
MODEL REFINEMENTPHENIX

Structure Validation

View Full Validation Report



View more in-depth experimental data
Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2023-06-14
    Type: Initial release
  • Version 1.1: 2023-08-09
    Changes: Database references
  • Version 1.2: 2023-08-23
    Changes: Data collection, Database references
  • Version 1.3: 2023-09-20
    Changes: Database references