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Immunoglobulin-like domain III (C-terminal domain) of Flavivirus envelope glycoprotein E The C-terminal domain (domain III) of Flavivirus glycoprotein E appears to be involved in low-affinity interactions with negatively charged glycoaminoglycans on the host cell surface. Domain III may also play a role in interactions with alpha-v-beta-3 integrins in West Nile virus, Japanese encephalitis virus, and Dengue virus. The interface between domain I and domain III appears to be destabilized by the low-pH environment of the endosome, and domain III may play a vital role in the conformational changes of envelope glycoprotein E that follow the clathrin-mediated endocytosis of viral particles and are a prerequisite to membrane fusion.
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