Kunjin virus envelope protein (KUNV E protein)

The Kunjin virus envelope protein (E protein) is the primary structural glycoprotein located on the surface of the Kunjin virus virion, which is a subtype of the West Nile virus (1.2.3, 1.3.1). It is essential for the viral infection process, as it mediates both the initial attachment to host cell receptors and the subsequent pH-dependent membrane fusion within the endosome (1.1.2, 1.4.1). The protein is organized into three distinct structural domains: Domain I (EDI), Domain II (EDII), and Domain III (EDIII), with EDIII being the primary site for receptor binding and a major target for neutralizing antibodies (1.1.1, 1.1.2). Due to its central role in viral entry and its high visibility to the host immune system, the E protein is a primary target for the development of vaccines and antiviral therapies, such as entry inhibitors and monoclonal antibodies (1.4.2, 1.4.4). While Kunjin virus typically causes milder disease compared to other West Nile virus lineages, targeting its envelope protein provides a pathway for developing broad-spectrum treatments against related flaviviruses (1.3.4, 1.4.4). Experimental inhibitors, including small molecules that bind to the conserved beta-OG pocket and mimetic peptides, have shown promise in blocking the conformational changes required for viral fusion (1.4.2, 1.4.4).

Other names

Kunjin virus E proteinWest Nile virus envelope protein (Kunjin strain)Envelope protein EKunjin virus E glycoproteingp66gp59gp53

Inhibition of viral entry by blocking receptor binding or preventing the pH-dependent conformational changes required for membrane fusion.