Chikungunya virus envelope glycoprotein E1-E2 interface

The **Chikungunya virus envelope glycoprotein E1-E2 interface** is a critical structural and functional region formed by the association of the E1 (fusion protein) and E2 (receptor binding protein) glycoproteins on the viral surface. This interface mediates key steps in the viral lifecycle, including attachment to host cell receptors (such as MXRA8 and heparan sulfate proteoglycans) and subsequent membrane fusion, enabling viral entry into the host cell[3][4][6][1][2]. The E2 glycoprotein is primarily responsible for host receptor binding, while E1 mediates pH-dependent fusion after endocytosis. Conformational changes at the E1-E2 interface regulate exposure of critical domains, such as the E1 fusion loop, for membrane fusion[2][3]. This interface is a major antigenic site, targeted by neutralizing antibodies and under investigation as a site for antiviral drug and vaccine development[3][6][1]. Because mutations at this interface can modulate viral infectivity, receptor tropism, and immune evasion, it is a functionally and clinically relevant therapeutic target[1][3][6].

Other names

Chikungunya virus E1-E2 glycoprotein interfaceCHIKV envelope glycoprotein interfaceChikungunya virus E1-E2 heterodimerCHIKV E1/E2

Inhibition of viral entry via blockade of the E1-E2 conformational changes required for membrane fusion[3][4][6]. Prevention of receptor (e.g., MXRA8) binding, thereby blocking viral attachment and entry[1][6]. Neutralization of the virus by targeting antigenic sites at the E1-E2 interface.