- EMDB-26494: Cryo-EM map of BG24 Fabs with an inferred germline light chain an... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-26494
タイトル
Cryo-EM map of BG24 Fabs with an inferred germline light chain and 10-1074 Fabs in complex with HIV-1 Env immunogen BG505-SOSIPv4.1-GT1 containing the N276 gp120 glycan- Class 2
マップデータ
試料
複合体: Cryo-EM map of BG24 Fabs with an inferred germline light chain and 10-1074 Fabs in complex with HIV-1 Env immunogen BG505-SOSIPv4.1-GT1 containing the N276 gp120 glycan- Class 2
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
HIVRAD P01 AI100148
米国
Bill & Melinda Gates Foundation
CAVD INV-002143
米国
引用
ジャーナル: Nat Commun / 年: 2022 タイトル: HIV-1 CD4-binding site germline antibody-Env structures inform vaccine design. 著者: Kim-Marie A Dam / Christopher O Barnes / Harry B Gristick / Till Schoofs / Priyanthi N P Gnanapragasam / Michel C Nussenzweig / Pamela J Bjorkman / 要旨: BG24, a VRC01-class broadly neutralizing antibody (bNAb) against HIV-1 Env with relatively few somatic hypermutations (SHMs), represents a promising target for vaccine strategies to elicit CD4- ...BG24, a VRC01-class broadly neutralizing antibody (bNAb) against HIV-1 Env with relatively few somatic hypermutations (SHMs), represents a promising target for vaccine strategies to elicit CD4-binding site (CD4bs) bNAbs. To understand how SHMs correlate with BG24 neutralization of HIV-1, we report 4.1 Å and 3.4 Å single-particle cryo-EM structures of two inferred germline (iGL) BG24 precursors complexed with engineered Env-based immunogens lacking CD4bs N-glycans. Structures reveal critical Env contacts by BG24 and identify antibody light chain structural features that impede Env recognition. In addition, biochemical data and cryo-EM structures of BG24 variants bound to Envs with CD4bs glycans present provide insights into N-glycan accommodation, including structural modes of light chain adaptations in the presence of the N276 glycan. Together, these findings reveal Env regions critical for germline antibody recognition and potential sites to alter in immunogen design.
全体 : Cryo-EM map of BG24 Fabs with an inferred germline light chain an...
全体
名称: Cryo-EM map of BG24 Fabs with an inferred germline light chain and 10-1074 Fabs in complex with HIV-1 Env immunogen BG505-SOSIPv4.1-GT1 containing the N276 gp120 glycan- Class 2
要素
複合体: Cryo-EM map of BG24 Fabs with an inferred germline light chain and 10-1074 Fabs in complex with HIV-1 Env immunogen BG505-SOSIPv4.1-GT1 containing the N276 gp120 glycan- Class 2
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超分子 #1: Cryo-EM map of BG24 Fabs with an inferred germline light chain an...
超分子
名称: Cryo-EM map of BG24 Fabs with an inferred germline light chain and 10-1074 Fabs in complex with HIV-1 Env immunogen BG505-SOSIPv4.1-GT1 containing the N276 gp120 glycan- Class 2 タイプ: complex / キメラ: Yes / ID: 1 / 親要素: 0 / 含まれる分子: #1-#6
由来(天然)
生物種: Human immunodeficiency virus 1 (ヒト免疫不全ウイルス)
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
緩衝液
pH: 8
凍結
凍結剤: ETHANE / 装置: FEI VITROBOT MARK IV
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電子顕微鏡法
顕微鏡
FEI TALOS ARCTICA
撮影
フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 60.0 e/Å2