Plants evolved double-acting proteins that jam insect digestion
Dongare PM, Madage VA, Deshpande NV, Giri AP, Pawar PK
Crop Improvement
The seeds and grains in your vegetable patch already carry built-in pest defenses, and understanding them could mean fewer sprays needed on your tomatoes and beans down the road.
Some plants, especially beans, grains, and legumes, produce small proteins that act like tiny locks jamming two of an insect's digestive tools at the same time, one for breaking down protein and one for breaking down starch. Scientists reviewed how these proteins evolved, what they look like structurally, and how new computer modeling tools like AlphaFold are helping researchers tweak them to be even better at stopping pests. The goal is to use these natural defenses to make crops more pest-resistant without relying as much on chemical pesticides.
Key Findings
Multifunctional inhibitors (MFIs) are single-chain proteins with spatially separated binding sites, allowing them to block multiple digestive enzymes simultaneously, including protease pairs (trypsin/chymotrypsin) and carbohydrate-enzyme pairs (alpha-amylase/alpha-glucosidase)
The review covers major structural families including Bowman-Birk, Kunitz-type, and cereal trypsin/alpha-amylase inhibitors, detailing their domain architecture and disulfide bond patterns that confer stability
Computational tools such as molecular docking, molecular dynamics simulations, and AlphaFold-based structure prediction are now enabling structure-guided engineering of improved inhibitors for biopesticide and food biotechnology applications
chevron_right Technical Summary
Many plants make natural proteins that block insect digestion by jamming two digestive enzymes at once, and scientists are now mapping their structures and using AI tools like AlphaFold to engineer stronger, more targeted versions for pest control.
Abstract Preview
Original paper
Evolution, structural diversity and functional plasticity of plant derived multifunctional proteases and α-amylases inhibitors.
Plant derived multifunctional inhibitors (MFIs) are an important class of plant defense proteins that disrupt insect digestion by simultaneously impairing protein and carbohydrate catabolism. With ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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