Cited by 14Protein Structure and DynamicsHeat shock proteins researchBacterial Genetics and Biotechnology

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Hfq C-terminal region forms a β-rich amyloid-like motif without perturbing the N-terminal Sm-like structure

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Abstract

Hfq is a pleitropic actor that serves as stress response and virulence factor in the bacterial cell. To execute its multiple functions, Hfq assembles into symmetric torus-shaped hexamers. Extending outward from the hexameric core, Hfq presents a C-terminal region, described as intrinsically disordered in solution. Many aspects of the role and the structure of this region remain unclear. For instance, in its truncated form it can promote amyloid-like filament assembly. Here, we show that a minimal 11-residue motif at the C-terminal end of Hfq assembles into filaments with amyloid characteristics. Our data suggest that the full-length Hfq in its filamentous state contains a similar molecular fingerprint than that of the short β-strand peptide, and that the Sm-core structure is not affected by filament formation. Hfq proteins might thus co-exist in two forms in vivo, either as isolated, soluble hexamers or as self-assembled hexamers through amyloid-reminiscent interactions, modulating Hfq cellular functions.

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Metadata

Authors
Berbon, M., Martinez, D., Morvan, E., Grélard, A., Kauffmann, B., Waeytens, J., Wien, F., Arluison, V., & Habenstein, B.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Université Libre de Bruxelles (BE)
  • Synchrotron SOLEIL (FR)
Corresponding author
  • Arluison, Véronique
  • Habenstein, Birgit
Venue
Communications Biology
Published
2023-10-21
Volume
6
Issue
1
Pages
1075-1075
ISSN
2399-3642 (ISSN-L)
OpenAlex
W4387844150
Cited by
14
References
1
Citations by year
2026: 2 · 2025: 7 · 2024: 5
FWCI
1.24
Type
journal article
Language
en
Open access
Locations
  • Communications Biology (publishedVersion, cc-by)
  • Research Square (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
  • Dépôt institutionnel de l'Université libre de Bruxelles (Université Libre de Bruxelles) (submittedVersion, other-oa)
  • HAL (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Oskar-Bordeaux (Universite de Bordeaux) (submittedVersion, cc-by)
Funders
  • Society for Research in Child Development
  • Agence Nationale de la Recherche (ANR-19-CE13-0021, 2017-, ANR‐19, ANR18, ANR-18-IDEX-0001)
  • Institut National de la Santé et de la Recherche Médicale (US001, ANR-18-IDEX-0001)
  • Centre National de la Recherche Scientifique (FR 2054)
  • Université de Bordeaux
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
Keywords
Hfq, C-terminal region, hexameric assembly, intrinsically disordered regions, bacterial stress response, virulence factors, protein self-assembly
MeSH terms
Escherichia coli, Protein Binding, Amyloid beta-Peptides, Escherichia coli Proteins, Host Factor 1 Protein

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