Zika virus envelope protein quaternary epitope (ZIKV EDE) (ZIKV EDE)

The Zika virus envelope (E) protein quaternary epitope is a complex antigenic site formed by the specific spatial arrangement of E protein dimers on the surface of mature virions and virus-like particles (VLPs) (Pierson & Diamond, 2018; Annual Review of Virology). These dimers are organized in a characteristic herringbone pattern, creating unique binding sites that are not present on individual monomeric E proteins (Rouvinski et al., 2015; Nature). This epitope is the primary target for highly potent, broadly neutralizing antibodies, such as ZIKV-117, that prevent the virus from entering host cells by interfering with receptor binding or the subsequent membrane fusion process (Sapparapu et al., 2016; Nature). Therapeutic strategies focusing on this target include the development of monoclonal antibodies and structure-based vaccine designs, such as mRNA-1893, aimed at eliciting a robust immune response (Moderna, 2024; Clinical Trials). A major clinical consideration for drugs targeting this epitope is the risk of antibody-dependent enhancement (ADE), where cross-reactive but non-neutralizing antibodies might increase the severity of subsequent infections by related flaviviruses like Dengue (Screaton et al., 2015; Nature Reviews Immunology). Understanding the structural biology of this quaternary epitope is essential for designing interventions that provide protection without inducing harmful cross-reactive responses. Research has shown that antibodies binding to the Envelope Dimer Epitope (EDE) can be particularly effective because they target a site conserved across different Zika strains and even some Dengue serotypes (Barba-Spaeth et al., 2016; Nature).

Other names

Zika virus E-dimer epitopeEnvelope dimer epitopeZIKV E protein quaternary structureZIKV E-dimerQuaternary epitope on intact Zika virionsZika virus envelope protein quaternary epitope on intact virions/VLPs

Neutralization of viral infectivity by blocking attachment to host receptors and inhibiting pH-dependent membrane fusion within the endosome.