Why are some bacterial genes high in purines?

A team at MIT has uncovered why certain bacteria load their genes with high levels of purines—a key building block of DNA and RNA. The answer: it's a protection mechanism. These genes shield their RNA transcripts from Rho, a cellular quality-control factor that would otherwise degrade them. Understanding this genetic strategy is crucial for expression engineering, the practice of designing genes that produce therapeutic proteins reliably. According to MIT's Department of Biology, this insight could help researchers engineer better-performing genes for living cells.

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