ATM(Q2971A) dimeric C-terminal region in complex with Mg AMP-PNP

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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Structural insights into the activation of ataxia-telangiectasia mutated by oxidative stress.

Howes, A.C.Perisic, O.Williams, R.L.

(2023) Sci Adv 9: eadi8291-eadi8291

  • DOI: https://doi.org/10.1126/sciadv.adi8291
  • Primary Citation of Related Structures:  
    8OXM, 8OXO, 8OXP, 8OXQ

  • PubMed Abstract: 

    Ataxia-telangiectasia mutated (ATM) is a master kinase regulating DNA damage response that is activated by DNA double-strand breaks. However, ATM is also directly activated by reactive oxygen species, but how oxidative activation is achieved remains unknown. We determined the cryo-EM structure of an H 2 O 2 -activated ATM and showed that under oxidizing conditions, ATM formed an intramolecular disulfide bridge between two protomers that are rotated relative to each other when compared to the basal state. This rotation is accompanied by release of the substrate-blocking PRD region and twisting of the N-lobe relative to the C-lobe, which greatly optimizes catalysis. This active site remodeling enabled us to capture a substrate (p53) bound to the enzyme. This provides the first structural insights into how ATM is activated during oxidative stress.

  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serine-protein kinase ATM
A, B
3,184Homo sapiensMutation(s): 1 
Gene Names: ATM
UniProt & NIH Common Fund Data Resources
Find proteins for Q13315 (Homo sapiens)
Explore Q13315 
Go to UniProtKB:  Q13315
GTEx:  ENSG00000149311 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13315
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC14801/A21211
Cancer Research UKUnited KingdomDRCPGM/100014
Medical Research Council (MRC, United Kingdom)United KingdomMC_U105184308

Revision History  (Full details and data files)

  • Version 1.0: 2023-09-27
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Database references