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Vesicular stomatitis virus G protein transmembrane region is crucial for the hemi-fusion to full fusion transition.

08:00 EDT 13th July 2018 | BioPortfolio

Summary of "Vesicular stomatitis virus G protein transmembrane region is crucial for the hemi-fusion to full fusion transition."

Viral fusion proteins are essential for enveloped virus infection. These proteins mediate fusion between the virus envelope and host cellular membrane to release the viral genome into cells. Vesicular stomatitis virus G (VSV G) protein is a typical type III viral fusion protein. To study the mechanism of VSV G protein mediated membrane fusion, we set up a cell-cell fusion system in which cells are marked by different fluorescent proteins. Taking advantage of this system, we performed real-time recording and quantitative analysis of the cell fusion mediated by VSV G. We found that the time scale required for VSV G mediated cell-cell fusion was approximately 1-2 minutes. Next, we specifically examined the function of the transmembrane (TM) region of VSV G protein in membrane fusion by replacing the TM region with those of other fusion proteins. The TM region replacements dramatically impaired VSV G protein function in the cell-cell fusion assay and diminished VSV G mediated lentivirus and recombinant VSV infection efficiency. Further experiments implied that the TM region played a role in the transition from hemi-fusion to full fusion. Several residues within the TM region were identified as important for membrane fusion. Overall, our findings unraveled the important function of the TM region in VSV G mediated viral fusion.

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Journal Details

This article was published in the following journal.

Name: Scientific reports
ISSN: 2045-2322
Pages: 10669

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Medical and Biotech [MESH] Definitions

A viral disease caused by at least two distinct species (serotypes) in the VESICULOVIRUS genus: VESICULAR STOMATITIS INDIANA VIRUS and VESICULAR STOMATITIS NEW JERSEY VIRUS. It is characterized by vesicular eruptions on the ORAL MUCOSA in cattle, horses, pigs, and other animals. In humans, vesicular stomatitis causes an acute influenza-like illness.

A species of VESICULOVIRUS causing VESICULAR STOMATITIS primarily in cattle, horses, and pigs. It can be transmitted to humans where it causes influenza-like symptoms.

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