PMID: 6243922Jan 1, 1980

Characterization of a foot-and-mouth disease mutant temperature-sensitive for viral RNA synthesis

Archives of Virology
J Polatnick, J Y Richmond


A temperature-sensitive (ts) mutant of foot-and-mouth disease virus (FMDV) did not produce RNA polymerase activity nor synthesize viral RNA when incubated in cells solely at the nonpermissive temperature (38.5 degrees C). Infected cells initially incubated at 38.5 degrees C and then shifted down to 33 degrees C synthesized increased amounts of viral RNA at earlier times compared to infected cells kept at 33 degrees C throughout, indicating that RNA polymerase precursors were synthesized at 38.5 degrees C. In cells shifted up to 38.5 degrees C from 33 degrees C, the total amount of viral RNA synthesized after infection increased sharply for about 15 minutes and then rapidly increased over the next 2 hours. RNA polymerase activity presented a similar pattern in its initial twofold increase and subsequent rapid decrease. Pulse labeling experiments showed that mutant viral RNA synthesis continued at a diminishing rate for 2 hours in cells shifted up to 38.5 degrees C. The data from temperature after shift-up was degraded. The FMDV ts mutant is apparently additionally defective in being unable to protect viral RNA synthesized after shift-up to 38.5 degrees C.


Jan 1, 1981·Archives of Virology·D McCahon


Nov 1, 1966·Virology·R B ArlinghausG F Vande Woude
May 1, 1968·Journal of Virology·F R Nichol, D R Tershak
Feb 1, 1970·The Journal of General Virology·M Y FiszmanA LWOFF
May 1, 1970·Proceedings of the Society for Experimental Biology and Medicine·J Polatnick, R B Arlinghaus
Jan 1, 1969·Journal of Molecular Biology·W McCormick, S Penman
Jan 1, 1962·Cold Spring Harbor Symposia on Quantitative Biology·A LWOFF

Related Concepts

DNA-Directed RNA Polymerase
RNA Polymerase Assembly Pathway
Foot-and-Mouth Disease
Alkaline Ribonuclease
RNA Polymerase Activity
RNA, Viral

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