Malaria parasites utilize two essential plasma membrane fusogens for gamete fertilization

Sudhir Kumar, Clari Valansi, Meseret T. Haile, Xiaohui Li, Kateryna Flyak, Abhisek Dwivedy, Biley A. Abatiyow, Amanda S. Leeb, Spencer Y. Kennedy, Nelly M. Camargo, Ashley M. Vaughan, Nicolas G. Brukman, Benjamin Podbilewicz, Stefan H.I. Kappe

Research output: Contribution to journalArticlepeer-review

Abstract

Cell fusion of female and male gametes is the climax of sexual reproduction. In many organisms, the Hapless 2 (HAP2) family of proteins play a critical role in gamete fusion. We find that Plasmodium falciparum, the causative agent of human malaria, expresses two HAP2 proteins: PfHAP2 and PfHAP2p. These proteins are present in stage V gametocytes and localize throughout the flagellum of male gametes. Gene deletion analysis and genetic crosses show that PfHAP2 and PfHAP2p individually are essential for male fertility and thereby, parasite transmission to the mosquito. Using a cell fusion assay, we demonstrate that PfHAP2 and PfHAP2p are both authentic plasma membrane fusogens. Our results establish nonredundant essential roles for PfHAP2 and PfHAP2p in mediating gamete fusion in Plasmodium and suggest avenues in the design of novel strategies to prevent malaria parasite transmission from humans to mosquitoes.

Original languageEnglish
Article number549
JournalCellular and Molecular Life Sciences
Volume79
Issue number11
DOIs
StatePublished - Nov 2022

Keywords

  • Cell fusion
  • Gametocyte
  • Macrogamete
  • Microgamete
  • Plasmodium
  • Transmission

All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Molecular Biology
  • Pharmacology
  • Cellular and Molecular Neuroscience
  • Cell Biology

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