Upcycled Gene Regulators

Researchers at POSTECH in Korea have developed a breakthrough technology, called SUPER (Synthetic Upcycling Platform for Engineering Regulators), that significantly improves the performance of genetic “switches” used in synthetic biology without requiring the disposal of underperforming components.

Gene switches control when specific genes turn on or off, but many exhibit a “leakage” problem, in which the gene remains partially active even when it should be off. This makes precise control difficult and can strain the host cells. Instead of redesigning these switches from scratch, the SUPER platform attaches a small RNA designed to capture and degrade residual gene products, thereby reducing leakage.

The result is that the contrast between on and off states improves by up to 20,000-fold, while overall switch performance increases by more than 10-fold. Adjusting the amount of small RNA also enables a single switch to operate in multiple modes, providing researchers and biotech companies with flexible, high-performance tools for gene regulation.

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