A PPP-type pseudophosphatase is required for the maintenance of basal complex integrity in Plasmodium falciparum.

A PPP-type pseudophosphatase is required for the maintenance of basal complex integrity in Plasmodium falciparum.
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DOI:
10.1038/s41467-023-39435-z
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发表时间:
2023-07-03
影响因子:
16.6
通讯作者:
Dvorin, Jeffrey D.
Dvorin, Jeffrey D.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Morano, Alexander A.;Rudlaff, Rachel M.;Dvorin, Jeffrey D.

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在其无性血液阶段,恶性疟原虫通过单细胞生殖进行复制,其中数十个子细胞在单个亲本中形成。基底复合体,一个分隔子细胞的收缩环,对雌配子体发育至关重要。在这项研究中,我们鉴定了一种对基础复合体维持至关重要的疟原虫基础复合体蛋白。使用多种显微镜技术,我们表明,PfPPP8是需要均匀的基础复杂的扩展和维护其完整性。我们的特点PfPPP8作为一个新的家庭的pseudophosphatases在其他Apicomplexan寄生虫同源的创始成员。通过免疫共沉淀,我们确定了另外两个新的基础复合物蛋白。我们的特点是独特的时间定位这些新的基础复杂的蛋白质(晚到)和PfPPP8(早离开)。在这项工作中,我们确定了一种新的基础复合物蛋白,确定其在分割中的特定作用,确定了一个新的假磷酸酶家族,并建立了恶性疟原虫基础复合物是一个动态结构。作者发现了一种假磷酸酶,它是基础复合物的重要组成部分,是疟疾寄生虫细胞分裂所需的收缩环。使用遗传学,生物化学和细胞生物学技术的组合,他们证明了假磷酸酶PfPPP8对基础复合物的完整性和收缩至关重要。
During its asexual blood stage, P. falciparum replicates via schizogony, wherein dozens of daughter cells are formed within a single parent. The basal complex, a contractile ring that separates daughter cells, is critical for schizogony. In this study, we identify a Plasmodium basal complex protein essential for basal complex maintenance. Using multiple microscopy techniques, we demonstrate that PfPPP8 is required for uniform basal complex expansion and maintenance of its integrity. We characterize PfPPP8 as the founding member of a novel family of pseudophosphatases with homologs in other Apicomplexan parasites. By co-immunoprecipitation, we identify two additional new basal complex proteins. We characterize the unique temporal localizations of these new basal complex proteins (late-arriving) and of PfPPP8 (early-departing). In this work, we identify a novel basal complex protein, determine its specific role in segmentation, identify a new pseudophosphatase family, and establish that the P. falciparum basal complex is a dynamic structure. The authors discover a pseudophosphatase that is an essential component of the basal complex, a contractile ring required for cell division of the malaria parasite. Using a combination of genetics, biochemistry, and cell biology techniques, they demonstrate that the pseudophosphatase, PfPPP8, is critical for integrity and contraction of the basal complex.
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