Structure of Tra1 subunit within the chromatin modifying complex SAGA

Experimental Data Snapshot

  • Resolution: 5.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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Structure of the transcription activator target Tra1 within the chromatin modifying complex SAGA.

Sharov, G.Voltz, K.Durand, A.Kolesnikova, O.Papai, G.Myasnikov, A.G.Dejaegere, A.Shem, A.B.Schultz, P.

(2017) Nat Commun 8: 1556-1556

  • DOI: https://doi.org/10.1038/s41467-017-01564-7
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The transcription co-activator complex SAGA is recruited to gene promoters by sequence-specific transcriptional activators and by chromatin modifications to promote pre-initiation complex formation. The yeast Tra1 subunit is the major target of acidic activators such as Gal4, VP16, or Gcn4 but little is known about its structural organization. The 430 kDa Tra1 subunit and its human homolog the transformation/transcription domain-associated protein TRRAP are members of the phosphatidyl 3-kinase-related kinase (PIKK) family. Here, we present the cryo-EM structure of the entire SAGA complex where the major target of activator binding, the 430 kDa Tra1 protein, is resolved with an average resolution of 5.7 Å. The high content of alpha-helices in Tra1 enabled tracing of the majority of its main chain. Our results highlight the integration of Tra1 within the major epigenetic regulator SAGA.

  • Organizational Affiliation

    Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404, Illkirch, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tra1 subunit within the chromatin modifying complex SAGAA [auth B]3,825Komagataella pastorisMutation(s): 0 
Find proteins for C4QYV4 (Komagataella phaffii (strain GS115 / ATCC 20864))
Explore C4QYV4 
Go to UniProtKB:  C4QYV4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC4QYV4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 5.70 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
French Infrastructure for Integrated Structural Biology (FRISBI)FranceANR-10-INSB-05-01
French National Research AgencyFranceANR-10-BINF-0003

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-08-09
    Changes: Database references, Structure summary
  • Version 1.2: 2017-09-20
    Changes: Database references
  • Version 1.3: 2017-11-29
    Changes: Database references
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references, Refinement description