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. 1984 Jun;50(3):878–883. doi: 10.1128/jvi.50.3.878-883.1984

Multiple proteases in foot-and-mouth disease virus replication.

J N Burroughs, D V Sangar, B E Clarke, D J Rowlands, A Billiau, D Collen
PMCID: PMC255749  PMID: 6328018

Abstract

Translation of foot-and-mouth disease virus RNA in a rabbit reticulocyte lysate for short time intervals resulted in the production of the peptides P20a , P16, and P88 (Lab, Lb, and P1) (R. R. Rueckert , Recommendations of the 3rd European Study Group on Molecular Biology of Picornavirus, Urbino , Italy, 1983). If further translation was prevented, the structural protein precursor P88 was not cleaved, even after prolonged incubation. This result indicates that the mechanism of the cleavage between P20a -P16 and P88 and of that between P88 and P52 (P2) differs from the mechanism of the secondary cleavages which produce the structural proteins. Furthermore, treatment of foot-and-mouth disease virus-infected cells with the protease inhibitor D-valyl phenylalanyl lysyl chloromethyl ketone prevented the in vivo cleavage between P20a -P16 and P88 but had no effect on any of the other cleavage events. These results suggest that the cleavage of the foot-and-mouth disease virus polyprotein utilizes two different host proteases.

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Selected References

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