Related Experiment Video
Updated: Jul 20, 2026
07:22
A High-throughput Cre-Lox Activated Viral Membrane Fusion Assay to Identify Inhibitors of HIV-1 Viral Membrane Fusion
Published on: August 14, 2018
Inhibition of hendra virus fusion
1Department of Pediatrics, Weill Medical College of Cornell University, 515 E. 71st St., 6th Floor, New York, NY 10021, USA.
Journal of Virology
|September 16, 2006
Summary
Hendra virus (HeV) fusion can be inhibited by peptides targeting the fusion protein (F). A human parainfluenza virus 3 peptide proved more effective than HeV-derived peptides in blocking viral entry.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- Hendra virus (HeV) is a fatal paramyxovirus with bioterrorism potential.
- Viral entry relies on the interaction between HeV's G and F proteins, involving conformational changes in F to form a six-helix bundle (6HB).
- Heptad repeat regions (HRN and HRC) in paramyxovirus F proteins are targets for fusion inhibition peptides.
Purpose of the Study:
- To analyze the triggering/activation of HeV F by G.
- To develop strategies for interfering with HeV viral entry.
- To evaluate the efficacy of HeV-derived and heterologous peptides in inhibiting HeV fusion.
Main Methods:
- Analysis of paramyxovirus F protein structure and function.
- Design and synthesis of peptides derived from HRN and HRC regions.
- In vitro assays to measure HeV fusion inhibition.
Main Results:
- HeV fusion is mediated by conformational changes in the F protein, leading to a 6HB structure.
- Peptides derived from HRN and HRC regions can inhibit HeV fusion.
- A human parainfluenza virus 3 F-peptide demonstrated superior inhibition of HeV fusion compared to HeV-derived peptides.
Conclusions:
- Interfering with the formation of the 6HB structure in HeV F is a viable strategy for blocking viral entry.
- Heterologous peptides may offer enhanced efficacy for inhibiting HeV fusion.
- Further research into peptide-based inhibitors could lead to novel antiviral therapies against HeV.
Related Concept Videos
01:25Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
01:19Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
01:30Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...