ZFYVE1 (also known as DFCP1) is a zinc finger FYVE domain-containing protein that plays critical roles in autophagy regulation and viral replication. The protein functions as a key component of omegasomes, omega-shaped ER-associated structures that serve as platforms for autophagosome formation by accumulating phosphatidylinositol 3-phosphate (PI3P) and recruiting essential autophagy machinery 1. ZFYVE1 is recruited to mitochondria during PINK1-mediated mitophagy, where it works alongside autophagy receptors NDP52 and optineurin to facilitate selective removal of damaged mitochondria 2. The protein also participates in reticulophagy through recruitment of early autophagy proteins including WIPI2 to specific ER subdomains 3. In viral infections, ZFYVE1 exhibits dual functions: it negatively regulates MDA5-mediated innate immune responses by inhibiting viral RNA binding and MDA5 oligomerization 4, while simultaneously facilitating SARS-CoV-2 replication through NSP6 interactions that establish replication organelle-lipid droplet contacts essential for viral RNA synthesis 5. These findings establish ZFYVE1 as a versatile regulator of cellular homeostasis, coordinating autophagy initiation, organelle quality control, and host-pathogen interactions.