Stable Cell Lines for COVID19 Research

Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is an enveloped, positive-sense single-stranded RNA ((+)ssRNA) virus belonging to the genus Betacoronavirus within the family Coronaviridae. Its ~30 kb genome encodes four major structural proteins—Spike (S), Membrane (M), Envelope (E), and Nucleocapsid (N)—along with multiple nonstructural and accessory proteins required for viral replication and pathogenesis. Viral entry is initiated through binding of the Spike protein to the host receptor angiotensin-converting enzyme 2 (ACE2), followed by proteolytic activation by host proteases such as TMPRSS2. Additional host factors, including Neuropilin-1 (NRP1), can further enhance viral attachment and entry into susceptible cells.

Stable cell lines expressing SARS-CoV-2 host entry factors provide robust and physiologically relevant tools for investigating virus-host interactions and viral entry mechanisms. These cell models are widely used for Spike-ACE2 binding studies, pseudovirus and live virus infection assays, neutralizing antibody evaluation, antiviral drug discovery, receptor biology, and functional characterization of emerging viral variants. eEnzyme offers a growing portfolio of recombinant stable cell lines expressing ACE2, hACE2, TMPRSS2, NRP1, and other host factors to support COVID-19 research, vaccine development, and therapeutic discovery.