Mohd Kamil, Umit Yasar Kina, Habibe Nur Atmaca, Sinem Unal, Gozde Deveci, Pinar Burak, Ahmed S I Aly
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引用次数: 0
摘要
内质网(ER)在多种真核细胞的应激反应调节中发挥着关键作用。然而,人们对调节疟原虫内质网应激反应的效应机制知之甚少。在此,我们旨在确定一种含跨膜蛋白33(TMEM33)域的蛋白在啮齿类疟原虫伯格希氏疟原虫生命周期中的重要性。TMEM33是一种ER膜驻留蛋白,参与调节各种真核细胞的应激反应。C端标记的TMEM33在整个血液和蚊子发育阶段都定位于ER中。靶向删除 TMEM33 证实了它对无性血液阶段和卵子发育的重要性,以及它对孢子虫在哺乳动物宿主中的感染性的重要作用。试验性分析表明,TMEM33 的缺失会导致启动 ER 应激反应和诱导自噬。我们的研究结果表明,TMEM33 在疟原虫所有生命周期阶段的发育过程中都发挥着重要作用,这表明它有可能成为抗疟靶标。
Endoplasmic reticulum localized TMEM33 domain-containing protein is crucial for all life cycle stages of the malaria parasite.
Endoplasmic reticulum (ER) plays a pivotal role in the regulation of stress responses in multiple eukaryotic cells. However, little is known about the effector mechanisms that regulate stress responses in ER of the malaria parasite. Herein, we aimed to identify the importance of a transmembrane protein 33 (TMEM33)-domain-containing protein in life cycle of the rodent malaria parasite Plasmodium berghei. TMEM33 is an ER membrane-resident protein that is involved in regulating stress responses in various eukaryotic cells. A C-terminal tagged TMEM33 was localized in the ER throughout the blood and mosquito stages of development. Targeted deletion of TMEM33 confirmed its importance for asexual blood stages and ookinete development, in addition to its essential role for sporozoite infectivity in the mammalian host. Pilot scale analysis shows that the loss of TMEM33 results in the initiation of ER stress response and induction of autophagy. Our findings conclude an important role of TMEM33 in the development of all life cycle stages of the malaria parasite, which indicates its potential as an antimalarial target.
期刊介绍:
Molecular Microbiology, the leading primary journal in the microbial sciences, publishes molecular studies of Bacteria, Archaea, eukaryotic microorganisms, and their viruses.
Research papers should lead to a deeper understanding of the molecular principles underlying basic physiological processes or mechanisms. Appropriate topics include gene expression and regulation, pathogenicity and virulence, physiology and metabolism, synthesis of macromolecules (proteins, nucleic acids, lipids, polysaccharides, etc), cell biology and subcellular organization, membrane biogenesis and function, traffic and transport, cell-cell communication and signalling pathways, evolution and gene transfer. Articles focused on host responses (cellular or immunological) to pathogens or on microbial ecology should be directed to our sister journals Cellular Microbiology and Environmental Microbiology, respectively.