Interaction with the N-acetylgalactosamine moiety facilitates pore formation by Cry4Aa toxin, thereby increasing its toxicity.

Interaction with N-acetylgalactosamine enhances Cry4Aa toxin binding, pore formation, and toxicity in mosquito larvae, with a 1.4-fold increase in liposome binding.

• Why it matters: Understanding the mechanism of pore formation by Cry toxins is crucial for improving biopesticide efficacy and developing targeted mosquito control strategies.
• What they did: The study examined Cry4Aa's interaction with sugar moieties, especially N-acetylgalactosamine, using binding assays, liposome experiments, and molecular docking, focusing on pore formation processes.
• The result: Findings suggest that N-acetylgalactosamine interaction facilitates Cry4Aa conformational changes, increasing pore numbers and toxicity, thereby advancing knowledge of Cry toxin insecticidal mechanisms.