Completed Infection & Immunity Cells, Biochemistry & Physiology

Erythrocyte invasion in malaria: molecular mechanism to precision therapeutics

In plain English

AI plain-English summary

Malaria parasites punch their way into red blood cells to survive, and this project will map the molecular machinery they use to do it. This matters because the parasite’s ability to invade red blood cells is the central event that causes disease symptoms, fuels parasite growth, and enables transmission to mosquitoes. Blocking that invasion would stop malaria in its tracks. The research focuses on a protein complex called PfRCR—made of PfRH5, PfCyRPA, and PfRIPR—which is essential for the invasion process. Scientists know the complex is critical, but they do not fully understand how it works at the molecular level, nor how the most potent human antibodies neutralise it. If this research succeeds, it will provide the structural blueprints needed to design better vaccines and therapeutic antibodies against malaria. The work is a mix of fundamental science—determining protein structures and invasion mechanisms—and applied design. By revealing how antibodies block invasion, the findings could guide the engineering of next-generation malaria therapeutics that are more effective and longer-lasting. This is not a cure ready for the clinic tomorrow, but a deep molecular understanding that could underpin future treatments.

View original technical description
Invasion of erythrocytes is one of the most critical steps in the life cycle of the malaria parasite. Prevent erythrocyte invasion, and we can prevent parasite growth, disease symptoms and transmission. Essential for erythrocyte invasion is the PfRCR complex of Plasmodium falciparum, consisting of PfRH5, PfCyRPA and PfRIPR. This proposal will use structural insights to guide experiments to understand the function of PfRCR in erythrocyte invasion, and to guide development of future vaccines and therapeutic antibodies. Over the next five years, I will: (i) Determine structures of PfRCR and PfRIPR and understand whether complex formation is necessary for invasion. (ii) Understand molecular mechanisms of the most invasion-neutralising human antibodies targeting PfRH5, PfCyRPA and PfRIPR. (iii) Determine how PfRH5 induces calcium flux in erythrocytes. (iv) Use structural insights to design improved therapeutic monoclonal antibodies and vaccine immunogens targeting PfRCR. These studies will deepen our understanding of this critical event in erythrocyte invasion. They will reveal the human antibody response to PfRCR vaccination and use this insight to guide design of the malaria therapeutics of the future.

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Researchers

Matthew Higgins (EPMC Awardee)

Related Research

Grants with similar aims, by meaning.

Molecular mechanisms of erythrocyte invasion in malaria
Cellular dissection of Plasmodium falciparum erythrocyte invasion
Dissecting the function of Plasmodium falciparum RH proteins in red blood cell invasion by the malaria parasite.
Elucidating the mechanism of reticulocyte-specific invasion by Plasmodium vivax.
Structural studies of reticulocyte invasion in Plasmodium vivax

Original classification

Investigator Award in Science

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