Forms an icosahedral capsid of pseudo T=3 symmetry with capsid proteins VP2 and VP3 (By similarity). The capsid is 300 Angstroms in diameter, composed of 60 copies of each capsid protein and enclosing the viral positive strand RNA genome (By similarity). Capsid protein VP1 mainly forms the vertices of the capsid (By similarity). Capsid protein VP1 interacts with host cell receptor to provide virion attachment to target host cells (By similarity). This attachment induces virion internalization (By similarity). Tyrosine kinases are probably involved in the entry process (By similarity). After binding to its receptor, the capsid undergoes conformational changes (By similarity). Capsid protein VP1 N-terminus (that contains an amphipathic alpha-helix) and capsid protein VP4 are externalized (By similarity). Together, they shape a pore in the host membrane through which viral genome is translocated to host cell cytoplasm (By similarity). Forms an icosahedral capsid of pseudo T=3 symmetry with capsid proteins VP2 and VP3 (By similarity). The capsid is 300 Angstroms in diameter, composed of 60 copies of each capsid protein and enclosing the viral positive strand RNA genome (By similarity). Forms an icosahedral capsid of pseudo T=3 symmetry with capsid proteins VP2 and VP3 (By similarity). The capsid is 300 Angstroms in diameter, composed of 60 copies of each capsid protein and enclosing the viral positive strand RNA genome (By similarity). Lies on the inner surface of the capsid shell (By similarity). After binding to the host receptor, the capsid undergoes conformational changes (By similarity). Capsid protein VP4 is released, Capsid protein VP1 N-terminus is externalized, and together, they shape a pore in the host membrane through which the viral genome is translocated into the host cell cytoplasm (By similarity). Component of immature procapsids, which is cleaved into capsid proteins VP4 and VP2 after maturation (By similarity). Allows the capsid to remain inactive before the maturation step (By similarity). Interacts with capsid protein VP1 and capsid protein VP3 to form heterotrimeric protomers. Interacts with capsid protein VP0, and capsid protein VP3 to form heterotrimeric protomers (By similarity). Five protomers subsequently associate to form pentamers which serve as building blocks for the capsid (By similarity). Interacts with capsid protein VP2, capsid protein VP3 and capsid protein VP4 following cleavage of capsid protein VP0 (By similarity). Interacts with capsid protein VP1 and capsid protein VP3 in the mature capsid. Interacts with capsid protein VP0 and capsid protein VP1 to form heterotrimeric protomers (By similarity). Five protomers subsequently associate to form pentamers which serve as building blocks for the capsid (By similarity). Interacts with capsid protein VP4 in the mature capsid (By similarity). Interacts with protein 2C; this interaction may be important for virion morphogenesis (By similarity). Interacts with capsid protein VP1 and capsid protein VP3. Specific enzymatic cleavages in vivo by the viral proteases yield processing intermediates and the mature proteins. Myristoylation is required for the formation of pentamers during virus assembly. Further assembly of 12 pentamers and a molecule of genomic RNA generates the provirion. During virion maturation, immature virions are rendered infectious following cleavage of VP0 into VP4 and VP2. This maturation seems to be an autocatalytic event triggered by the presence of RNA in the capsid and it is followed by a conformational change infectious virion. Myristoylation is required during RNA encapsidation and formation of the mature virus particle. Belongs to the picornaviruses polyprotein family.