Researchers at the University of Oxford have discovered how viruses assemble their protective protein shells without external instructions. Using an advanced imaging technique called mass photometry, scientists directly observed virus-like particles building themselves one molecule at a time. The findings, published in Nature, reveal surprisingly simple rules that enable complex biological structures to form reliably despite thousands of possible ways proteins could connect. Understanding this assembly process could lead to new antiviral drugs, improved vaccines, and other medical treatments.
The research shows that viral assembly works through a series of stable intermediate stages that guide construction toward completion. Proteins initially form weak connections that allow incorrect combinations to separate, giving molecules multiple chances to find the correct arrangement. Once a critical threshold is reached—such as when five protein units form a closed pentagonal ring—the structure becomes stable enough to support rapid growth. This combination of trial-and-error followed by locked-in structures explains how viruses consistently achieve the correct configuration without blueprints or external machinery directing the process.
Source: Read the full story at ScienceDaily
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