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Structural insights into the Langya virus attachment glycoprotein.

Chenghai Wang1, Min Li2, Yufan Wang1

  • 1School of Biomedical Sciences, Hunan University, Changsha, China.

Structure (London, England : 1993)
|May 30, 2024
PubMed
Summary

Langya virus (LayV) attachment protein does not bind to common henipavirus receptors. Structural analysis reveals LayV G protein differs from other henipaviruses, suggesting a unique entry mechanism and aiding targeted drug development.

Keywords:
Langya henipavirusattachment glycoprotein structurehenipavirusviral cell receptor

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Area of Science:

  • Virology
  • Structural Biology
  • Biochemistry

Background:

  • Langya virus (LayV), a zoonotic henipavirus (HNV), has been identified in patients with pneumonia.
  • Henipaviruses typically utilize ephrin-B proteins as cellular receptors, mediated by their attachment glycoprotein (G).
  • The specific cellular receptor for LayV remains unidentified.

Purpose of the Study:

  • To determine the receptor-binding characteristics of the Langya virus attachment glycoprotein.
  • To elucidate the structural basis for LayV G protein's interaction with host cells.
  • To provide insights for developing antiviral therapies against LayV.

Main Methods:

  • X-ray crystallography was used to determine the 2.77 Å structure of the LayV G C-terminal domain (CTD).
  • Structural comparisons were made between LayV G CTD and G proteins from other henipaviruses (MojV, NiV, HeV, CedV).
  • Surface plasmon resonance (SPR) assays were performed to assess binding interactions between LayV G and ephrin-B proteins.

Main Results:

  • The crystal structure of the LayV G CTD was determined, revealing an architecture similar to Mojiang virus (MojV) G protein.
  • LayV G protein structure significantly differs from Nipah virus (NiV), Hendra virus (HeV), and Cedar virus (CedV) G proteins.
  • SPR experiments demonstrated that LayV G does not bind to ephrin-B proteins, suggesting steric hindrance may impede this interaction.

Conclusions:

  • Langya virus attachment glycoprotein (G) does not utilize ephrin-B proteins as its cellular receptor.
  • The distinct structure of LayV G protein suggests a unique mechanism for host cell entry compared to other HNVs.
  • These findings are crucial for understanding LayV pathogenesis and developing targeted antiviral strategies.