ジャーナル: EMBO Mol Med / 年: 2014 タイトル: A potent anti-dengue human antibody preferentially recognizes the conformation of E protein monomers assembled on the virus surface. 著者: Guntur Fibriansah / Joanne L Tan / Scott A Smith / Adamberage R de Alwis / Thiam-Seng Ng / Victor A Kostyuchenko / Kristie D Ibarra / Jiaqi Wang / Eva Harris / Aravinda de Silva / James E Crowe / Shee-Mei Lok / 要旨: Dengue virus (DENV), which consists of four serotypes (DENV1-4), infects over 400 million people annually. Previous studies have indicated most human monoclonal antibodies (HMAbs) from dengue ...Dengue virus (DENV), which consists of four serotypes (DENV1-4), infects over 400 million people annually. Previous studies have indicated most human monoclonal antibodies (HMAbs) from dengue patients are cross-reactive and poorly neutralizing. Rare neutralizing HMAbs are usually serotype-specific and bind to quaternary structure-dependent epitopes. We determined the structure of DENV1 complexed with Fab fragments of a highly potent HMAb 1F4 to 6 Å resolution by cryo-EM. Although HMAb 1F4 appeared to bind to virus and not E proteins in ELISAs in the previous study, our structure showed that the epitope is located within an envelope (E) protein monomer, and not across neighboring E proteins. The Fab molecules bind to domain I (DI), and DI-DII hinge of the E protein. We also showed that HMAb 1F4 can neutralize DENV at different stages of viral entry in a cell type and receptor dependent manner. The structure reveals the mechanism by which this potent and specific antibody blocks viral infection.
全体 : Dengue virus serotype 1 with Fab fragments of human monoclonal an...
全体
名称: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4
要素
試料: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4
ウイルス: Dengue virus 1 (デング熱ウイルス)
タンパク質・ペプチド: Fab fragment of antibody 1F4
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超分子 #1000: Dengue virus serotype 1 with Fab fragments of human monoclonal an...
超分子
名称: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4 タイプ: sample / ID: 1000 / 集合状態: 120 Fab molecules bind to one dengue virion / Number unique components: 2