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J Virol. 1983 November; 48(2): 547-550

Bivalent attachment of antibody onto poliovirus leads to conformational alteration and neutralization.

ABSTRACT

The treatment of nonsaturating, neutralizing antibody-poliovirus complexes with papain generally led to the loss of viral neutralization and to the loss of the neutralization-associated change in the isoelectric point (pI) of the virion. Subsequent treatment with anti-immunoglobulin G antibodies restored the neutralization of the virus and the alteration of the viral pI. It appears that, under nonsaturating conditions, poliovirus neutralization by an antibody is dependent upon the ability of the antibody to bivalently attach to the virion. Exceptions are monospecific neutralizing antibodies with an affinity for capsid protein VP3.

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