6ZLO

E2 core of the fungal Pyruvate dehydrogenase complex with asymmetric interior PX30 component


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Arrangement and symmetry of the fungal E3BP-containing core of the pyruvate dehydrogenase complex.

Forsberg, B.O.Aibara, S.Howard, R.J.Mortezaei, N.Lindahl, E.

(2020) Nat Commun 11: 4667-4667

  • DOI: 10.1038/s41467-020-18401-z
  • Primary Citation of Related Structures:  
    6ZLM, 6ZLO

  • PubMed Abstract: 
  • The pyruvate dehydrogenase complex (PDC) is a multienzyme complex central to aerobic respiration, connecting glycolysis to mitochondrial oxidation of pyruvate. Similar to the E3-binding protein (E3BP) of mammalian PDC, PX selectively recruits E3 to the fungal PDC, but its divergent sequence suggests a distinct structural mechanism ...

    The pyruvate dehydrogenase complex (PDC) is a multienzyme complex central to aerobic respiration, connecting glycolysis to mitochondrial oxidation of pyruvate. Similar to the E3-binding protein (E3BP) of mammalian PDC, PX selectively recruits E3 to the fungal PDC, but its divergent sequence suggests a distinct structural mechanism. Here, we report reconstructions of PDC from the filamentous fungus Neurospora crassa by cryo-electron microscopy, where we find protein X (PX) interior to the PDC core as opposed to substituting E2 core subunits as in mammals. Steric occlusion limits PX binding, resulting in predominantly tetrahedral symmetry, explaining previous observations in Saccharomyces cerevisiae. The PX-binding site is conserved in (and specific to) fungi, and complements possible C-terminal binding motifs in PX that are absent in mammalian E3BP. Consideration of multiple symmetries thus reveals a differential structural basis for E3BP-like function in fungal PDC.


    Organizational Affiliation

    Department of Applied Physics, Swedish eScience Research Center, KTH Royal Institute of Technology, 17168, Solna, Sweden. erik.lindahl@dbb.su.se.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Dihydrolipoyllysine-residue acetyltransferase component of pyruvate dehydrogenase complex, mitochondrial278Neurospora crassa OR74AMutation(s): 0 
Gene Names: mrp-3NCU07659
EC: 2.3.1.12
UniProt
Find proteins for P20285 (Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987))
Explore P20285 
Go to UniProtKB:  P20285
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden2015-04107
Swedish Research CouncilSweden2017-04641
European Research Council (ERC)European UnionERC-2018-StG-805230
European Research Council (ERC)European Unionbioexcel-823830
Knut and Alice Wallenberg FoundationSweden2018.0080

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-23
    Type: Initial release
  • Version 1.1: 2020-09-30
    Changes: Database references
  • Version 1.2: 2020-12-16
    Changes: Database references