Oxford scientists watched a virus build itself — one molecule at a time

A virus shell can hold hundreds of protein pieces that somehow snap together with no blueprint and no foreman. Philipp Kukura's team at Oxford has now watched it happen in real time, molecule by molecule, using a new single-molecule technique. They found the pieces make flimsy first connections, then lock into a few ultra-stable shapes that act like checkpoints — once a five-piece ring closes, assembly accelerates. Published in Nature, the discovery reveals the hidden rules of self-assembly — knowledge that could sharpen how we design vaccines and antivirals.