Self-assembles to form the virion icosahedral capsid with a T=1 symmetry. This very small capsid (25 nm in diameter) allows the virus to be very stable in the environment and resistant to some disinfectants, including detergents. Essential for the initial attachment to host receptors. After attachment, the virus is endocytosed and traffics to the nucleus. The capsid protein binds and transports the viral genome and Rep across the nuclear envelope (By similarity). Homomultimer (Potential). Interacts with Rep; this interaction relocates Rep into the nucleus (By similarity). VP1 and VP2 are detected 12 hours post infection, while VP3 only after 24 hours. Belongs to the gyrovirus capsid protein family.