PCRCR complex is essential for invasion of human erythrocytes by Plasmodium falciparum.

PCRCR complex is essential for invasion of human erythrocytes by Plasmodium falciparum.
复制标题

PCRCR 复合物对于恶性疟原虫入侵人类红细胞至关重要。

DOI:
10.1038/s41564-022-01261-2
复制
发表时间:
2022-12
影响因子:
28.3
通讯作者:
--
中科院分区:
生物学1区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

最严重的疟疾是由恶性疟原虫引起的。这些寄生虫侵入人类红细胞,这个过程中的一个重要步骤涉及配体 PfRh5,它与富含半胱氨酸的保护性抗原 (CyRPA) 和 PfRh5 相互作用蛋白 (PfRipr)(RCR 复合物)形成复合物,并与宿主细胞上的 Basigin 结合。我们鉴定了一种由恶性疟原虫血小板反应蛋白相关顶端裂殖子蛋白 (PfPTRAMP) 和恶性疟原虫富含半胱氨酸的小分泌蛋白 (PfCSS) 组成的异聚二硫键连接复合物,并表明它与 RCR 结合形成五聚体复合物 PCRCR。使用具有条件敲除的恶性疟原虫系、PfPTRAMP 和 PfCSS 的入侵抑制纳米抗体以及晶格光片显微镜,我们证明它们对于裂殖子入侵至关重要。 PCRCR复合体的功能是锚定裂殖子和红细胞膜之间的接触,这些膜是由强烈的寄生虫变形结合在一起的。我们解析了纳米抗体-PfCSS 复合物的结构,以确定抑制性表位。我们的结果定义了 PCRCR 复合物的功能,并确定了入侵中和表位,为血期疟疾疫苗的这些蛋白质的结构指导开发提供了路线图。异聚二硫键连接复合物与 RCR 复合物结合,是恶性疟原虫入侵人红细胞所必需的。
The most severe form of malaria is caused by Plasmodium falciparum. These parasites invade human erythrocytes, and an essential step in this process involves the ligand PfRh5, which forms a complex with cysteine-rich protective antigen (CyRPA) and PfRh5-interacting protein (PfRipr) (RCR complex) and binds basigin on the host cell. We identified a heteromeric disulfide-linked complex consisting of P. falciparum Plasmodium thrombospondin-related apical merozoite protein (PfPTRAMP) and P. falciparum cysteine-rich small secreted protein (PfCSS) and have shown that it binds RCR to form a pentameric complex, PCRCR. Using P. falciparum lines with conditional knockouts, invasion inhibitory nanobodies to both PfPTRAMP and PfCSS, and lattice light-sheet microscopy, we show that they are essential for merozoite invasion. The PCRCR complex functions to anchor the contact between merozoite and erythrocyte membranes brought together by strong parasite deformations. We solved the structure of nanobody–PfCSS complexes to identify an inhibitory epitope. Our results define the function of the PCRCR complex and identify invasion neutralizing epitopes providing a roadmap for structure-guided development of these proteins for a blood stage malaria vaccine. A heteromeric disulfide-linked complex binds to the RCR complex and is required for invasion of human erythrocytes by Plasmodium falciparum.
DOI: 10.1371/journal.pone.0072504
发表时间: 2013
期刊: PloS one
影响因子: 3.7
作者:
Healer J;Thompson JK;Riglar DT;Wilson DW;Chiu YH;Miura K;Chen L;Hodder AN;Long CA;Hansen DS;Baum J;Cowman AF
通讯作者: Cowman AF
DOI: 10.1107/s0907444904019158
发表时间: 2004-12-01
影响因子: 2.2
作者:
Emsley, P;Cowtan, K
通讯作者: Cowtan, K
DOI: 10.1016/j.ijpara.2008.10.006
发表时间: 2009-02-01
影响因子: 4
作者:
Baum, Jake;Chen, Lin;Cowman, Alan F.
通讯作者: Cowman, Alan F.
DOI: 10.7554/elife.21347.001
发表时间: 2017-02-14
期刊: ELIFE
影响因子: 7.7
作者:
Chen, Lin;Xu, Yibin;Cowman, Alan F.
通讯作者: Cowman, Alan F.
DOI: 10.1111/mmi.14904
发表时间: 2022-05
影响因子: 3.6
作者:
Bullen, Hayley E.;Sanders, Paul R.;Dans, Madeline G.;Jonsdottir, Thorey K.;Riglar, David T.;Looker, Oliver;Palmer, Catherine S.;Kouskousis, Betty;Charnaud, Sarah C.;Triglia, Tony;Gabriela, Mikha;Schneider, Molly Parkyn;Chan, Jo-Anne;de Koning-Ward, Tania F.;Baum, Jake;Kazura, James W.;Beeson, James G.;Cowman, Alan F.;Gilson, Paul R.;Crabb, Brendan S.
通讯作者: Crabb, Brendan S.