- EMDB-43670: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B... -
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データを開く
IDまたはキーワード:
読み込み中...
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基本情報
登録情報
データベース: EMDB / ID: EMD-43670
タイトル
Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) stabilized in a prefusion-like conformation in complex with 1G2 and 7H3, global refinement
マップデータ
sharpened
試料
複合体: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) stabilized in a prefusion-like conformation in complex with 1G2 and 7H3
複合体: human cytomegalovirus (HCMV) glycoprotein B (gB) ectodomain
複合体: Fab 1G2
複合体: Fab 7H3
キーワード
orthoherpesvirus / betaherpesvirus / cytomegalovirus / human betaherpesvirus 5 / human cytomegalovirus / HCMV / glycoprotein B / gB / HCMV gB / prefusion-stabilized / disulfide / viral protein / 7H3 / 1G2
生物種
Human betaherpesvirus 5 (ヘルペスウイルス) / Homo sapiens (ヒト)
ジャーナル: Proc Natl Acad Sci U S A / 年: 2024 タイトル: Structure-based design of a soluble human cytomegalovirus glycoprotein B antigen stabilized in a prefusion-like conformation. 著者: Madeline R Sponholtz / Patrick O Byrne / Alison G Lee / Ajit R Ramamohan / Jory A Goldsmith / Ryan S McCool / Ling Zhou / Nicole V Johnson / Ching-Lin Hsieh / Megan Connors / Krithika P ...著者: Madeline R Sponholtz / Patrick O Byrne / Alison G Lee / Ajit R Ramamohan / Jory A Goldsmith / Ryan S McCool / Ling Zhou / Nicole V Johnson / Ching-Lin Hsieh / Megan Connors / Krithika P Karthigeyan / Chelsea M Crooks / Adelaide S Fuller / John D Campbell / Sallie R Permar / Jennifer A Maynard / Dong Yu / Matthew J Bottomley / Jason S McLellan / 要旨: Human cytomegalovirus (HCMV) glycoprotein B (gB) is a class III membrane fusion protein required for viral entry. HCMV vaccine candidates containing gB have demonstrated moderate clinical efficacy, ...Human cytomegalovirus (HCMV) glycoprotein B (gB) is a class III membrane fusion protein required for viral entry. HCMV vaccine candidates containing gB have demonstrated moderate clinical efficacy, but no HCMV vaccine has been approved. Here, we used structure-based design to identify and characterize amino acid substitutions that stabilize gB in its metastable prefusion conformation. One variant containing two engineered interprotomer disulfide bonds and two cavity-filling substitutions (gB-C7), displayed increased expression and thermostability. A 2.8 Å resolution cryoelectron microscopy structure shows that gB-C7 adopts a prefusion-like conformation, revealing additional structural elements at the membrane-distal apex. Unlike previous observations for several class I viral fusion proteins, mice immunized with postfusion or prefusion-stabilized forms of soluble gB protein displayed similar neutralizing antibody titers, here specifically against an HCMV laboratory strain on fibroblasts. Collectively, these results identify initial strategies to stabilize class III viral fusion proteins and provide tools to probe gB-directed antibody responses.
ダウンロード / ファイル: emd_43670.map.gz / 形式: CCP4 / 大きさ: 421.9 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
sharpened
ボクセルのサイズ
X=Y=Z: 0.8332 Å
密度
表面レベル
登録者による: 0.27
最小 - 最大
-1.4004209 - 1.8859003
平均 (標準偏差)
0.0001961399 (±0.027172938)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
0
0
0
サイズ
480
480
480
Spacing
480
480
480
セル
A=B=C: 399.93597 Å α=β=γ: 90.0 °
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添付データ
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試料の構成要素
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全体 : Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B...
全体
名称: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) stabilized in a prefusion-like conformation in complex with 1G2 and 7H3
要素
複合体: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) stabilized in a prefusion-like conformation in complex with 1G2 and 7H3
複合体: human cytomegalovirus (HCMV) glycoprotein B (gB) ectodomain
複合体: Fab 1G2
複合体: Fab 7H3
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超分子 #1: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B...
超分子
名称: Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) stabilized in a prefusion-like conformation in complex with 1G2 and 7H3 タイプ: complex / ID: 1 / 親要素: 0
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超分子 #2: human cytomegalovirus (HCMV) glycoprotein B (gB) ectodomain
超分子
名称: human cytomegalovirus (HCMV) glycoprotein B (gB) ectodomain タイプ: complex / ID: 2 / 親要素: 1
由来(天然)
生物種: Human betaherpesvirus 5 (ヘルペスウイルス)
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超分子 #3: Fab 1G2
超分子
名称: Fab 1G2 / タイプ: complex / ID: 3 / 親要素: 1
由来(天然)
生物種: Homo sapiens (ヒト)
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超分子 #4: Fab 7H3
超分子
名称: Fab 7H3 / タイプ: complex / ID: 4 / 親要素: 1
由来(天然)
生物種: Homo sapiens (ヒト)
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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
濃度
4 mg/mL
緩衝液
pH: 8 構成要素:
濃度
名称
式
2.0 mM
Tris
200.0 mM
sodium chloride
NaCl
0.02 percent (w/v)
sodium azide
0.12 percent (w/v)
CHAPS
0.01 percent (w/v)
amphipol A8-35
3.0 percent (v/v)
glycerol
詳細: 2 mM Tris pH 8, 200 mM NaCl, 0.02% (w/v) sodium azide, 3% (v/v) glycerol, 0.12% (w/v) CHAPS, 0.01% (w/v) amphipol A8-35
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV
詳細
Soluble ectodomain of human cytomegalovirus (HCMV) glycoprotein B (gB) in the stabilized in a prefusion-like conformation, 1G2 Fab, and 7H3 Fab purified separately, mixed, and incubated for 30 minutes on ice prior to grid preparation