Dengue virus serotype 4 envelope protein domain III (DENV4 EDIII)

The Dengue virus serotype 4 envelope protein domain III (DENV4 EDIII) is a critical structural component of the DENV-4 virion surface, functioning as the primary receptor-binding domain. It is an immunoglobulin-like fold located at the C-terminus of the envelope (E) protein and is responsible for mediating the initial attachment of the virus to host cell receptors. Because EDIII is highly solvent-exposed and contains many serotype-specific epitopes, it is a major target for the development of neutralizing antibodies and subunit vaccines. In the context of disease, DENV-4 infection can lead to a spectrum of illnesses ranging from self-limiting dengue fever to life-threatening dengue hemorrhagic fever and shock syndrome. A significant challenge in targeting this protein is antibody-dependent enhancement (ADE), where sub-neutralizing levels of antibodies can facilitate viral entry into Fc-receptor-bearing cells, potentially worsening the clinical outcome. Consequently, therapeutic and prophylactic strategies focus on eliciting a potent and specific immune response against EDIII to ensure complete neutralization across all circulating strains of the serotype.

Other names

DENV-4 E-DIIIDengue virus 4 envelope protein domain 3DENV4 E domain IIIDengue virus type 4 envelope protein domain III

Neutralization of viral infection by blocking the interaction between the viral envelope protein and host cell receptors, thereby preventing viral attachment and subsequent entry.