1887

Abstract

Passage of foot-and-mouth disease virus (FMDV) in BHK-21 cells resulted in the segmentation of the viral genome into two defective RNAs lacking part of either the L- or the capsid-coding region. The two RNAs are infectious by complementation. Electroporation of L-defective RNA in BHK-21 cells resulted in the accumulation of the precursor P3 located away from the deleted sequence. Expression of L led to the processing of P3, indicating that there is a connection between L protease activity and the secondary cleavages carried out by 3C protease within P3. These results suggest that the complementation mechanism between defective RNAs is not restricted to supplying the L and capsid proteins but that distance effects on polyprotein processing events are also implicated.

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2016-07-01
2024-04-27
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