Structural basis for recognition of the malaria vaccine candidate Pfs48/45 by a transmission blocking antibody.

Structural basis for recognition of the malaria vaccine candidate Pfs48/45 by a transmission blocking antibody.
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DOI:
10.1038/s41467-018-06340-9
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发表时间:
2018-09-20
影响因子:
16.6
通讯作者:
Higgins MK
Higgins MK
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lennartz F;Brod F;Dabbs R;Miura K;Mekhaiel D;Marini A;Jore MM;Søgaard MM;Jørgensen T;de Jongh WA;Sauerwein RW;Long CA;Biswas S;Higgins MK

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寻求研制有效的疟疾疫苗仍然是防治全球传染病的一个主要优先事项。一种具有巨大潜力的方法是传播阻断疫苗,它诱导抗体,防止在以受感染的人为食的蚊子中建立生产性感染,从而阻止传播周期。这种疫苗最有希望的靶点之一是配子表面蛋白Pfs 48/45。在这里,我们建立了一个生产全长Pfs 48/45的系统,并使用它来提高一组单克隆抗体。我们绘制了这些抗体在Pfs 48/45上的结合区域,并将其表位的位置与其传播阻断活性相关联。最后,我们展示了Pfs 48/45的C-末端结构域与最有效的传递阻断抗体结合的结构,并为未来结构指导的免疫原设计提供关键的分子信息。pfs 48/45是阻断传播的疟疾疫苗的一个有前途的成分。在这里,作者开发了一种系统来生产用于免疫的全长Pfs 48/45,构建了一组单克隆抗体,并确定了有效的传播阻断表位的结构。
The quest to develop an effective malaria vaccine remains a major priority in the fight against global infectious disease. An approach with great potential is a transmission-blocking vaccine which induces antibodies that prevent establishment of a productive infection in mosquitos that feed on infected humans, thereby stopping the transmission cycle. One of the most promising targets for such a vaccine is the gamete surface protein, Pfs48/45. Here we establish a system for production of full-length Pfs48/45 and use this to raise a panel of monoclonal antibodies. We map the binding regions of these antibodies on Pfs48/45 and correlate the location of their epitopes with their transmission-blocking activity. Finally, we present the structure of the C-terminal domain of Pfs48/45 bound to the most potent transmission-blocking antibody, and provide key molecular information for future structure-guided immunogen design. Pfs48/45 is a promising component for a transmission-blocking malaria vaccine. Here, the authors develop a system to produce full-length Pfs48/45 for immunisation, characterise a panel of monoclonal antibodies and determine the structure of a potent transmission-blocking epitope.
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