Hexose Transport Mechanisms in Malaria Parasites
Summary
Malaria parasites of the genus Plasmodium rely almost entirely on anaerobic glycolysis for energy during the blood stage of infection. To sustain the high glycolytic flux required for rapid proliferation, parasites import host glucose via specialised hexose transporters embedded in the parasite plasma membrane. The principal transporter in Plasmodium falciparum, PfHT1, belongs to the major facilitator superfamily and mediates facilitated diffusion of glucose and related hexoses. Kinetic studies reveal saturable uptake following Michaelis–Menten behaviour, with Km values in the low‐hundreds micromolar range and Vmax reflecting transporter density and turnover rate. Structural divergence from human GLUTs confers selectivity, making PfHT1 and its orthologues in other species, such as PvHT1 in Plasmodium vivax, compelling targets for antimalarial intervention. Inhibiting these transporters induces parasite starvation, arrests development at trophozoite and schizont stages, and offers a route to overcome existing drug resistance. Advances in biochemical assays, structural modelling and inhibitor design continue to elucidate transporter conformational dynamics, substrate recognition and the molecular basis of selective blockade.
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Hexose Transport Mechanisms in Malaria Parasites publication trend
The graph below shows the total number of articles in hexose transport mechanisms in malaria parasites across all publications each year (not limited to Nature Index journals).
Technical terms
Hexose transporter (PfHT1): A parasite plasma‐membrane protein that facilitates facilitated diffusion of hexose sugars.
Km: Substrate concentration at which the transport rate is half of Vmax.
Vmax: Maximum rate of substrate transport achieved by a transporter at saturating substrate concentration.
Michaelis–Menten kinetics: A model describing how transport rate varies with substrate concentration under steady‐state conditions.
Virtual docking: Computational method to predict how small molecules bind to protein binding sites.
References
- Functional characterization of Plasmodium vivax hexose transporter 1. Frontiers in Cellular and Infection Microbiology (2024).
- Molecular docking, simulation and binding free energy analysis of small molecules as PfHT1 inhibitors. PLOS ONE (2022).
- Identification of Selective Inhibitors of the Plasmodium falciparum Hexose Transporter PfHT by Screening Focused Libraries of Anti-Malarial Compounds. PLOS ONE (2015).
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