C. thermophilum Pyruvate Dehydrogenase Complex Core

Experimental Data Snapshot

  • Resolution: 6.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Integrative structure of a 10-megadalton eukaryotic pyruvate dehydrogenase complex from native cell extracts.

Kyrilis, F.L.Semchonok, D.A.Skalidis, I.Tuting, C.Hamdi, F.O'Reilly, F.J.Rappsilber, J.Kastritis, P.L.

(2021) Cell Rep 34: 108727-108727

  • DOI: https://doi.org/10.1016/j.celrep.2021.108727
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The pyruvate dehydrogenase complex (PDHc) is a giant enzymatic assembly involved in pyruvate oxidation. PDHc components have been characterized in isolation, but the complex's quaternary structure has remained elusive due to sheer size, heterogeneity, and plasticity. Here, we identify fully assembled Chaetomium thermophilum α-keto acid dehydrogenase complexes in native cell extracts and characterize their domain arrangements utilizing mass spectrometry, activity assays, crosslinking, electron microscopy (EM), and computational modeling. We report the cryo-EM structure of the PDHc core and observe unique features of the previously unknown native state. The asymmetric reconstruction of the 10-MDa PDHc resolves spatial proximity of its components, agrees with stoichiometric data (60 E2p:12 E3BP:∼20 E1p: ≤ 12 E3), and proposes a minimum reaction path among component enzymes. The PDHc shows the presence of a dynamic pyruvate oxidation compartment, organized by core and peripheral protein species. Our data provide a framework for further understanding PDHc and α-keto acid dehydrogenase complex structure and function.

  • Organizational Affiliation

    Interdisciplinary Research Center HALOmem, Charles Tanford Protein Center, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 3a, Halle/Saale, Germany; Institute of Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 3, Halle/Saale, Germany.

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Acetyltransferase component of pyruvate dehydrogenase complex459Thermochaetoides thermophila DSM 1495Mutation(s): 0 
Find proteins for G0S4X6 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0S4X6 
Go to UniProtKB:  G0S4X6
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UniProt GroupG0S4X6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-10
    Type: Initial release
  • Version 1.1: 2021-02-17
    Changes: Database references