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Ancient Toxin SAIP Targets Insects, Sparks Bioinsecticide Patent

5/2/2026

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Summary

Researchers Discover SAIP

Y. Xu, R.M. Stubbendieck and R. Viswanatha discovered the toxin SAIP, which ADP-ribosylates insect eEF2 via the Flower receptor but spares mammals.
Genomic analysis dated the diphtheria-like gene cluster to the Cretaceous, about 125 million years ago.
SAIP killed larvae in hours, with 4 femtomoles removing 80 % of fruit flies in 60 hours.
A patent aims to develop SAIP as a bioinsecticide for crops and mosquito control.

Summary

Researchers Evaluate SAIP

Experts say it is premature to judge whether SAIP can replace conventional chemical pesticides.
Because its mode of action differs from Bt toxins, SAIP could be rotated with other bio-insecticides to slow pest resistance.
The team is testing SAIP for mosquito-control, suggesting public-health uses beyond crops.
They note that commercial deployment will require extensive field trials and regulatory approval.

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Researchers Discover SAIP

Y. Xu, R.M. Stubbendieck and R. Viswanatha discovered the toxin SAIP, which ADP-ribosylates insect eEF2 via the Flower receptor but spares mammals.
Genomic analysis dated the diphtheria-like gene cluster to the Cretaceous, about 125 million years ago.
SAIP killed larvae in hours, with 4 femtomoles removing 80 % of fruit flies in 60 hours.
A patent aims to develop SAIP as a bioinsecticide for crops and mosquito control.

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