ジャーナル: Proc Natl Acad Sci U S A / 年: 2014 タイトル: Neutralizing antibodies can initiate genome release from human enterovirus 71. 著者: Pavel Plevka / Pei-Yin Lim / Rushika Perera / Jane Cardosa / Ampa Suksatu / Richard J Kuhn / Michael G Rossmann / 要旨: Antibodies were prepared by immunizing mice with empty, immature particles of human enterovirus 71 (EV71), a picornavirus that causes severe neurological disease in young children. The capsid ...Antibodies were prepared by immunizing mice with empty, immature particles of human enterovirus 71 (EV71), a picornavirus that causes severe neurological disease in young children. The capsid structure of these empty particles is different from that of the mature virus and is similar to "A" particles encountered when picornaviruses recognize a potential host cell before genome release. The monoclonal antibody E18, generated by this immunization, induced a conformational change when incubated at temperatures between 4 °C and 37 °C with mature virus, transforming infectious virions into A particles. The resultant loss of genome that was observed by cryo-EM and a fluorescent SYBR Green dye assay inactivated the virus, establishing the mechanism by which the virus is inactivated and demonstrating that the E18 antibody has potential as an anti-EV71 therapy. The antibody-mediated virus neutralization by the induction of genome release has not been previously demonstrated. Furthermore, the present results indicate that antibodies with genome-release activity could also be produced for other picornaviruses by immunization with immature particles.
全体 : Reconstruction of human enterovirus 71 in complex with Fab fragme...
全体
名称: Reconstruction of human enterovirus 71 in complex with Fab fragment of antibody E18
要素
試料: Reconstruction of human enterovirus 71 in complex with Fab fragment of antibody E18
ウイルス: Human enterovirus 71 (エンテロウイルス)
タンパク質・ペプチド: Fab EV18/4/D6-1/F1/G9
-
超分子 #1000: Reconstruction of human enterovirus 71 in complex with Fab fragme...
超分子
名称: Reconstruction of human enterovirus 71 in complex with Fab fragment of antibody E18 タイプ: sample / ID: 1000 / 集合状態: Icosahedral virus and 60 copies of bound Fab / Number unique components: 2
分子量
理論値: 6.8 MDa
-
超分子 #1: Human enterovirus 71
超分子
名称: Human enterovirus 71 / タイプ: virus / ID: 1 / Name.synonym: EV71 / NCBI-ID: 39054 / 生物種: Human enterovirus 71 / ウイルスタイプ: VIRION / ウイルス・単離状態: SEROTYPE / ウイルス・エンベロープ: No / ウイルス・中空状態: No / Syn species name: EV71 / Sci species serotype: EV-174