Structural basis for Marburg virus neutralization by a cross-reactive human antibody.

Structural basis for Marburg virus neutralization by a cross-reactive human antibody.
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DOI:
10.1016/j.cell.2015.01.041
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发表时间:
2015-02-26
期刊:
影响因子:
64.5
通讯作者:
Saphire EO
Saphire EO
中科院分区:
生物学1区
文献类型:
--
作者:
Hashiguchi T;Fusco ML;Bornholdt ZA;Lee JE;Flyak AI;Matsuoka R;Kohda D;Yanagi Y;Hammel M;Crowe JE Jr;Saphire EO

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包括马尔堡病毒和埃博拉病毒在内的丝状病毒在其表面表达一种称为 GP 的单一糖蛋白,负责附着和进入靶细胞。丝状病毒 GP 的蛋白质序列差异高达 70%,并且尚未描述它们之间发生交叉反应的抗体。在这里,我们展示了马尔堡病毒 GP 与人类幸存者的交叉反应抗体复合物的 3.6 Å 晶体结构,以及与埃博拉病毒 GP 结合的抗体的较低分辨率结构。 MR78 抗体可识别丝状病毒家族中保守的 GP1 表位,该表位可能代表其 NPC1 受体的结合位点。事实上,MR78 阻断了必需的 NPC1 结构域 C 的结合。这些结构和含有粘蛋白的 MARV 和 EBOV GP 的额外小角 X 射线散射表明了为什么以前在埃博拉病毒的研究中没有引发此类抗体,并为免疫治疗和进入抑制剂的开发提供了关键模板。
The filoviruses, including Marburg and Ebola, express a single glycoprotein on their surface, termed GP, which is responsible for attachment and entry of target cells. Filovirus GPs differ by up to 70% in protein sequence, and no antibodies are yet described that cross-react among them. Here, we present the 3.6 Å crystal structure of Marburg virus GP in complex with a cross-reactive antibody from a human survivor, and a lower resolution structure of the antibody bound to Ebola virus GP. The antibody, MR78, recognizes a GP1 epitope conserved across the filovirus family, which likely represents the binding site of their NPC1 receptor. Indeed, MR78 blocks binding of the essential NPC1 domain C. These structures and additional small-angle X-ray scattering of mucin-containing MARV and EBOV GPs suggest why such antibodies were not previously elicited in studies of Ebola virus, and provide critical templates for development of immunotherapeutics and inhibitors of entry.
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