Escherichia coli AdhE structure in its compact conformation

Experimental Data Snapshot

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

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This is version 2.0 of the entry. See complete history


Filamentation of the bacterial bi-functional alcohol/aldehyde dehydrogenase AdhE is essential for substrate channeling and enzymatic regulation.

Pony, P.Rapisarda, C.Terradot, L.Marza, E.Fronzes, R.

(2020) Nat Commun 11: 1426-1426

  • DOI: https://doi.org/10.1038/s41467-020-15214-y
  • Primary Citation of Related Structures:  
    6TQH, 6TQM

  • PubMed Abstract: 

    Acetaldehyde-alcohol dehydrogenase (AdhE) enzymes are a key metabolic enzyme in bacterial physiology and pathogenicity. They convert acetyl-CoA to ethanol via an acetaldehyde intermediate during ethanol fermentation in an anaerobic environment. This two-step reaction is associated to NAD + regeneration, essential for glycolysis. The bifunctional AdhE enzyme is conserved in all bacterial kingdoms but also in more phylogenetically distant microorganisms such as green microalgae. It is found as an oligomeric form called spirosomes, for which the function remains elusive. Here, we use cryo-electron microscopy to obtain structures of Escherichia coli spirosomes in different conformational states. We show that spirosomes contain active AdhE monomers, and that AdhE filamentation is essential for its activity in vitro and function in vivo. The detailed analysis of these structures provides insight showing that AdhE filamentation is essential for substrate channeling within the filament and for the regulation of enzyme activity.

  • Organizational Affiliation

    Structure and Function of Bacterial Nanomachines - Institut Européen de Chimie et Biologie, University of Bordeaux, 2 rue Robert Escarpit, 33600, Pessac, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aldehyde-alcohol dehydrogenaseA [auth F],
B [auth C],
C [auth B],
D [auth A]
891Escherichia coli K-12Mutation(s): 0 
Gene Names: adhEanab1241JW1228
EC: (PDB Primary Data), (PDB Primary Data)
Find proteins for P0A9Q7 (Escherichia coli (strain K12))
Explore P0A9Q7 
Go to UniProtKB:  P0A9Q7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A9Q7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.80 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
European Research Council (ERC)European UnionTransfoPneumo

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-03
    Type: Initial release
  • Version 2.0: 2023-11-15
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Refinement description, Source and taxonomy, Structure summary