Update Publication. Rotavirus (RV) is one of the most significant pathogens in humans and animals with diarrhea worldwide. Cell entry is the first step in viral infection, and the outer capsid protein VP4 is crucial for RV attachment and internalization. In order to discover novel candidate host factors involved in RV cell entry, a proximity labeling method was applied to systematically investigate the VP4 and host protein interactions. A total of 174 high confidence host proteins were identified using proximity labeling. Further analysis showed that 88 proteins were located in the cytoskeleton, plasma membrane, and extracellular region, which could be involved in RV entry.