Direct structural analysis of a single acyl carrier protein domain in fatty acid synthase from the fungus Saccharomyces cerevisiae.


Journal

Communications biology
ISSN: 2399-3642
Titre abrégé: Commun Biol
Pays: England
ID NLM: 101719179

Informations de publication

Date de publication:
12 Jan 2024
Historique:
received: 24 07 2023
accepted: 03 01 2024
medline: 13 1 2024
pubmed: 13 1 2024
entrez: 12 1 2024
Statut: epublish

Résumé

Acyl carrier protein (ACP) is the work horse of polyketide (PKS) and fatty acid synthases (FAS) and acts as a substrate shuttling domain in these mega enzymes. In fungi, FAS forms a 2.6 MDa symmetric assembly with six identical copies of FAS1 and FAS2 polypeptides. However, ACP spatial distribution is not restricted by symmetry owing to the long and flexible loops that tether the shuttling domain to its corresponding FAS2 polypeptide. This symmetry breaking has hampered experimental investigation of substrate shuttling route in fungal FAS. Here, we develop a protein engineering and expression method to isolate asymmetric fungal FAS proteins containing odd numbers of ACP domains. Electron cryomicroscopy (cryoEM) observation of the engineered complex reveals a non-uniform distribution of the substrate shuttling domain relative to its corresponding FAS2 polypeptide at 2.9 Å resolution. This work lays the methodological foundation for experimental study of ACP shuttling route in fungi.

Identifiants

pubmed: 38216676
doi: 10.1038/s42003-024-05777-7
pii: 10.1038/s42003-024-05777-7
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

92

Informations de copyright

© 2024. The Author(s).

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Auteurs

Elnaz Khalili Samani (EK)

Department of Medical Biophysics, University of Toronto, Toronto, Canada.

Amy C Chen (AC)

Department of Medical Biophysics, University of Toronto, Toronto, Canada.

Jennifer W Lou (JW)

Department of Medical Biophysics, University of Toronto, Toronto, Canada.

David L Dai (DL)

Department of Medical Biophysics, University of Toronto, Toronto, Canada.

Alexander F A Keszei (AFA)

Department of Medical Biophysics, University of Toronto, Toronto, Canada.
Princess Margaret Cancer Center, University Health Network, Toronto, Canada.

Guihong Tan (G)

Donnelly Centre, Toronto, Canada.

Charles Boone (C)

Donnelly Centre, Toronto, Canada.
Department of Molecular Genetics, University of Toronto, Toronto, Canada.

Martin Grininger (M)

Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, Goethe University, Frankfurt, Germany.

Mohammad T Mazhab-Jafari (MT)

Department of Medical Biophysics, University of Toronto, Toronto, Canada. mohammad.mazhabjafari@utoronto.ca.
Princess Margaret Cancer Center, University Health Network, Toronto, Canada. mohammad.mazhabjafari@utoronto.ca.

Classifications MeSH