National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
U19 AI109762
米国
引用
ジャーナル: Cell Rep / 年: 2018 タイトル: Structural Basis of Pan-Ebolavirus Neutralization by an Antibody Targeting the Glycoprotein Fusion Loop. 著者: Charles D Murin / Jessica F Bruhn / Zachary A Bornholdt / Jeffrey Copps / Robyn Stanfield / Andrew B Ward / 要旨: Monoclonal antibodies (mAbs) with pan-ebolavirus cross-reactivity are highly desirable, but development of such mAbs is limited by a lack of a molecular understanding of cross-reactive epitopes. The ...Monoclonal antibodies (mAbs) with pan-ebolavirus cross-reactivity are highly desirable, but development of such mAbs is limited by a lack of a molecular understanding of cross-reactive epitopes. The antibody ADI-15878 was previously identified from a human survivor of Ebola virus Makona variant (EBOV/Mak) infection. This mAb demonstrated potent neutralizing activity against all known ebolaviruses and provided protection in rodent and ferret models against three ebolavirus species. Here, we describe the unliganded crystal structure of ADI-15878 as well as the cryo-EM structures of ADI-15878 in complex with the EBOV/Mak and Bundibugyo virus (BDBV) glycoproteins (GPs). ADI-15878 binds through an induced-fit mechanism by targeting highly conserved residues in the internal fusion loop (IFL), bridging across GP protomers via the heptad repeat 1 (HR1) region. Our structures provide a more complete description of the ebolavirus immunogenic landscape, as well as a molecular basis for how rare but potent antibodies target conserved filoviral fusion machinery.
履歴
登録
2018年7月5日
登録サイト: RCSB / 処理サイト: RCSB
改定 1.0
2018年9月12日
Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: FSC / Data content type: FSC / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2018年9月12日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / カテゴリ: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name
pH: 7.4 詳細: Solutions were made fresh from 10X concentrate and filtered with a 0.2 micrometer filter into a sterile glass container.
緩衝液成分
ID
濃度
名称
式
Buffer-ID
1
150milimolar
sodiumchloride
NaCl
1
2
20milimolar
Tris
Tris
1
試料
濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES 詳細: Antibody ADI-15878 Fab was added in 10 molar excess to glycoprotein and allowed to incubate overnight at 4 degrees Celsius followed by size exclusion chromatography to purify the complex and rid of excess Fab.
試料支持
詳細: unspecified
急速凍結
装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K 詳細: 3.5s blot on both sides of the grid using Whattman No. 1 filter paper
-
電子顕微鏡撮影
実験機器
モデル: Titan Krios / 画像提供: FEI Company
顕微鏡
モデル: FEI TITAN KRIOS / 詳細: Preliminary grid screening was performed manually