SARS-CoV-2 membrane and envelope proteins (M and E proteins)

The SARS-CoV-2 membrane (M) and envelope (E) proteins are essential structural components of the viral envelope, playing pivotal roles in viral assembly, budding, and pathogenesis (nih.gov, wikipedia.org). The M protein is the most abundant structural protein and serves as the primary scaffold for virion formation by interacting with the spike (S), envelope (E), and nucleocapsid (N) proteins (mdpi.com, wikipedia.org). The E protein is a small, multifunctional viroporin that forms cation-selective ion channels, which are crucial for viral release and the induction of host inflammatory responses, including the activation of the NLRP3 inflammasome (nih.gov, mdpi.com). Both proteins are emerging as significant therapeutic targets for the development of antivirals (patsnap.com). Small-molecule inhibitors like JNJ-9676 and CIM-834 target the M protein to disrupt viral assembly, while amiloride derivatives like hexamethylene amiloride (HMA) aim to block the E protein's ion channel activity (nih.gov). Targeting these proteins provides a potential mechanism to reduce viral replication and alleviate the cytokine storm associated with severe COVID-19 (nih.gov). Furthermore, because these proteins are relatively conserved, they represent attractive targets for broad-spectrum coronavirus therapies (nih.gov).

Other names

M proteinE proteinMatrix proteinE1 glycoproteinsM proteinMembrane glycoproteinEnvelope small membrane protein

Inhibition of viral assembly and morphogenesis; Blockade of viroporin ion channel activity; Disruption of protein-protein interactions.