Plasmodium 80S ribosome (Pf80S)

The Plasmodium 80S ribosome is the cytosolic protein synthesis machinery of the malaria parasite, essential for its growth and survival across multiple life cycle stages (Sun et al., 2015, Science). It is a large ribonucleoprotein complex consisting of a 40S small subunit and a 60S large subunit that translate messenger RNA into proteins. Although it shares a general architecture with the human 80S ribosome, the Plasmodium version contains unique ribosomal RNA expansion segments and protein isoforms that create parasite-specific structural pockets (Wong et al., 2014, eLife). These differences are exploited in drug discovery to develop selective inhibitors that can distinguish between the parasite and host translation machinery. Compounds such as emetine and mefloquine have been shown to bind to the Plasmodium 80S ribosome, effectively blocking translation elongation or translocation (Wong et al., 2014, eLife). Targeting this ribosome is a validated strategy for developing potent, multi-stage antimalarials, though achieving high selectivity to avoid host toxicity remains a primary challenge. Modern research utilizes high-resolution cryo-electron microscopy to identify these species-specific binding sites for the design of next-generation therapeutics.

Other names

Plasmodium falciparum 80S ribosomeCytosolic ribosome of PlasmodiumMalarial 80S ribosomeMalarial ribosome

Inhibition of protein synthesis by blocking translation elongation, translocation, or the decoding process on the cytosolic 80S ribosome (Wong et al., 2014, eLife).