This research reveals the detailed 3D structure of a fungal virus called HvV190S using advanced microscopy techniques. The study shows that despite differences in protein sequences, many related viruses share a similar structural core in their protective shell. This finding helps us better understand how these viruses are built and function. Impacts on everyday life: – Improves our understanding of plant diseases caused by fungal viruses – Advances methods for studying tiny biological structures – Could help develop ways to control crop diseases – May lead to new antifungal treatments – Contributes to basic knowledge of virus structure and evolution