AI Insight
This study demonstrates that the identity of sterols present in cell membranes is a key determinant of whether an organism is susceptible to saponins, a class of antimicrobial and insecticidal compounds produced by plants. Different eukaryotic kingdoms use distinct sterols, such as cholesterol in animals, ergosterol in fungi, and phytosterols in plants, and these differences appear to explain the selective toxicity of saponins across organisms. The findings also shed light on how plants themselves resist the saponins they produce during biosynthesis and storage.
Why it matters
Understanding the molecular basis of saponin selectivity could inform the development of more targeted antifungal agents, biopesticides, or crop protection strategies with reduced off-target effects on non-pest organisms.
Proceedings of the National Academy of Sciences, Volume 123, Issue 19, May 2026. <br/>SignificanceThe basis for the selective activity of saponins across organisms, and for plant self-resistance during their biosynthesis and storage, is not fully understood. Here, we show that membrane sterol identity governs susceptibility to saponins and …