ジャーナル: EMBO Mol Med / 年: 2014 タイトル: A potent anti-dengue human antibody preferentially recognizes the conformation of E protein monomers assembled on the virus surface. 著者: Guntur Fibriansah / Joanne L Tan / Scott A Smith / Adamberage R de Alwis / Thiam-Seng Ng / Victor A Kostyuchenko / Kristie D Ibarra / Jiaqi Wang / Eva Harris / Aravinda de Silva / James E Crowe / Shee-Mei Lok / 要旨: Dengue virus (DENV), which consists of four serotypes (DENV1-4), infects over 400 million people annually. Previous studies have indicated most human monoclonal antibodies (HMAbs) from dengue ...Dengue virus (DENV), which consists of four serotypes (DENV1-4), infects over 400 million people annually. Previous studies have indicated most human monoclonal antibodies (HMAbs) from dengue patients are cross-reactive and poorly neutralizing. Rare neutralizing HMAbs are usually serotype-specific and bind to quaternary structure-dependent epitopes. We determined the structure of DENV1 complexed with Fab fragments of a highly potent HMAb 1F4 to 6 Å resolution by cryo-EM. Although HMAb 1F4 appeared to bind to virus and not E proteins in ELISAs in the previous study, our structure showed that the epitope is located within an envelope (E) protein monomer, and not across neighboring E proteins. The Fab molecules bind to domain I (DI), and DI-DII hinge of the E protein. We also showed that HMAb 1F4 can neutralize DENV at different stages of viral entry in a cell type and receptor dependent manner. The structure reveals the mechanism by which this potent and specific antibody blocks viral infection.
ダウンロード / ファイル: emd_2442.map.gz / 形式: CCP4 / 大きさ: 976.6 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Cryo-EM reconstruction of Dengue virus serotype 1 complexed with Fab fragments of human antibody 1F4
ボクセルのサイズ
X=Y=Z: 1 Å
密度
表面レベル
登録者による: 2.0 / ムービー #1: 2
最小 - 最大
-0.76943427 - 12.091775889999999
平均 (標準偏差)
0.0 (±0.99999994)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
-320
-320
-320
サイズ
640
640
640
Spacing
640
640
640
セル
A=B=C: 640.0 Å α=β=γ: 90.0 °
CCP4マップ ヘッダ情報:
mode
Image stored as Reals
Å/pix. X/Y/Z
1
1
1
M x/y/z
640
640
640
origin x/y/z
0.000
0.000
0.000
length x/y/z
640.000
640.000
640.000
α/β/γ
90.000
90.000
90.000
start NX/NY/NZ
0
0
-40
NX/NY/NZ
55
55
81
MAP C/R/S
1
2
3
start NC/NR/NS
-320
-320
-320
NC/NR/NS
640
640
640
D min/max/mean
-0.769
12.092
-0.000
-
添付データ
-
試料の構成要素
-
全体 : Dengue virus serotype 1 with Fab fragments of human monoclonal an...
全体
名称: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4
要素
試料: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4
ウイルス: Dengue virus 1 (デング熱ウイルス)
タンパク質・ペプチド: Fab fragment of antibody 1F4
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超分子 #1000: Dengue virus serotype 1 with Fab fragments of human monoclonal an...
超分子
名称: Dengue virus serotype 1 with Fab fragments of human monoclonal antibody 1F4 タイプ: sample / ID: 1000 / 集合状態: 120 Fab molecules bind to one dengue virion / Number unique components: 2