- EMDB-7136: High-Resolution Structure Analysis of Antibody V5 and U4 Conforma... -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: EMDB / ID: EMD-7136
タイトル
High-Resolution Structure Analysis of Antibody V5 and U4 Conformational Epitope on Human Papillomavirus 16
マップデータ
Antibody V5 and U4 Conformational Epitope on Human Papillomavirus 16
試料
複合体: Human papillomavirus type 16 / Antibody complex
複合体: Antibody U4
タンパク質・ペプチド: U4 Heavy chain
タンパク質・ペプチド: U4 Light chain
ウイルス: Human papillomavirus type 16 (パピローマウイルス)
タンパク質・ペプチド: Major capsid protein L1
キーワード
HPV16 / H16.V5 / Fab / VIRUS-IMMUNE SYSTEM complex
機能・相同性
機能・相同性情報
T=7 icosahedral viral capsid / endocytosis involved in viral entry into host cell / virion attachment to host cell / host cell nucleus / structural molecule activity 類似検索 - 分子機能
Major capsid L1 (late) protein, Papillomavirus / Major capsid L1 (late) superfamily, Papillomavirus / L1 (late) protein / Double-stranded DNA virus, group I, capsid 類似検索 - ドメイン・相同性
National Institutes of Health/Office of the Director
S10OD019995
米国
引用
ジャーナル: Viruses / 年: 2017 タイトル: High-Resolution Structure Analysis of Antibody V5 and U4 Conformational Epitopes on Human Papillomavirus 16. 著者: Jian Guan / Stephanie M Bywaters / Sarah A Brendle / Robert E Ashley / Alexander M Makhov / James F Conway / Neil D Christensen / Susan Hafenstein / 要旨: Cancers attributable to human papillomavirus (HPV) place a huge burden on the health of both men and women. The current commercial vaccines are genotype specific and provide little therapeutic ...Cancers attributable to human papillomavirus (HPV) place a huge burden on the health of both men and women. The current commercial vaccines are genotype specific and provide little therapeutic benefit to patients with existing HPV infections. Identifying the conformational epitopes on the virus capsid supports the development of improved recombinant vaccines to maximize long-term protection against multiple types of HPV. Fragments of antibody (Fab) digested from the neutralizing monoclonal antibodies H16.V5 (V5) and H16.U4 (U4) were bound to HPV16 capsids and the structures of the two virus-Fab complexes were solved to near atomic resolution using cryo-electron microscopy. The structures reveal virus conformational changes, the Fab-binding mode to the capsid, the residues comprising the epitope and indicate a potential interaction of U4 with the minor structural protein, L2. Competition enzyme-linked immunosorbent assay (ELISA) showed V5 outcompetes U4 when added sequentially, demonstrating a steric interference even though the footprints do not overlap. Combined with our previously reported immunological and structural results, we propose that the virus may initiate host entry through an interaction between the icosahedral five-fold vertex of the capsid and receptors on the host cell. The highly detailed epitopes identified for the two antibodies provide a framework for continuing biochemical, genetic and biophysical studies.