ジャーナル: Nat Struct Mol Biol / 年: 2013 タイトル: Supersite of immune vulnerability on the glycosylated face of HIV-1 envelope glycoprotein gp120. 著者: Leopold Kong / Jeong Hyun Lee / Katie J Doores / Charles D Murin / Jean-Philippe Julien / Ryan McBride / Yan Liu / Andre Marozsan / Albert Cupo / Per-Johan Klasse / Simon Hoffenberg / Michael ...著者: Leopold Kong / Jeong Hyun Lee / Katie J Doores / Charles D Murin / Jean-Philippe Julien / Ryan McBride / Yan Liu / Andre Marozsan / Albert Cupo / Per-Johan Klasse / Simon Hoffenberg / Michael Caulfield / C Richter King / Yuanzi Hua / Khoa M Le / Reza Khayat / Marc C Deller / Thomas Clayton / Henry Tien / Ten Feizi / Rogier W Sanders / James C Paulson / John P Moore / Robyn L Stanfield / Dennis R Burton / Andrew B Ward / Ian A Wilson / 要旨: A substantial proportion of the broadly neutralizing antibodies (bnAbs) identified in certain HIV-infected donors recognize glycan-dependent epitopes on HIV-1 gp120. Here we elucidate how the bnAb ...A substantial proportion of the broadly neutralizing antibodies (bnAbs) identified in certain HIV-infected donors recognize glycan-dependent epitopes on HIV-1 gp120. Here we elucidate how the bnAb PGT 135 binds its Asn332 glycan-dependent epitope from its 3.1-Å crystal structure with gp120, CD4 and Fab 17b. PGT 135 interacts with glycans at Asn332, Asn392 and Asn386, using long CDR loops H1 and H3 to penetrate the glycan shield and access the gp120 protein surface. EM reveals that PGT 135 can accommodate the conformational and chemical diversity of gp120 glycans by altering its angle of engagement. Combined structural studies of PGT 135, PGT 128 and 2G12 show that this Asn332-dependent antigenic region is highly accessible and much more extensive than initially appreciated, which allows for multiple binding modes and varied angles of approach; thereby it represents a supersite of vulnerability for antibody neutralization.
全体 : PGT135 Fab fragment bound to HIV-1 clade A BG505 background SOSIP...
全体
名称: PGT135 Fab fragment bound to HIV-1 clade A BG505 background SOSIP gp140 trimer.
要素
試料: PGT135 Fab fragment bound to HIV-1 clade A BG505 background SOSIP gp140 trimer.
タンパク質・ペプチド: HIV-1 SOSIP.664 gp140
タンパク質・ペプチド: PGT135 broadly neutralizing antibody
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超分子 #1000: PGT135 Fab fragment bound to HIV-1 clade A BG505 background SOSIP...
超分子
名称: PGT135 Fab fragment bound to HIV-1 clade A BG505 background SOSIP gp140 trimer. タイプ: sample / ID: 1000 / 集合状態: One Fab binds one gp140 monomer / Number unique components: 2
試料ホルダーモデル: SIDE ENTRY, EUCENTRIC / Tilt angle min: -50
実験機器
モデル: Tecnai F20 / 画像提供: FEI Company
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画像解析
CTF補正
詳細: Not corrected
最終 再構成
想定した対称性 - 点群: C3 (3回回転対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 20.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: EMAN 詳細: Particles picked automatically using DoG-picker and cleaned up with reference free 2D class averaging 使用した粒子像数: 8831