Coronaviruses (CoVs) infect host cells through the fusion of viral and cellular membrane and may also spread to the neighboring uninfected cells from infected cells through cell-cell fusion. The viral spike (S) glycoproteins play an essential role in mediating membrane fusion. Here, we present a luciferase-based quantitative assay to measure the efficiency of cell-cell fusion mediated by the S protein of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). This method applies to S proteins of the other coronaviruses and can be adapted to fusion proteins of other enveloped viruses.
Keywords: Cell; Cell fusion; Coronavirus; Human angiotensin-converting enzyme 2; Luciferase; SARS-CoV-2; Spike glycoprotein.
© 2023. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.