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J Virol. 1971 July; 8(1): 56-61
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Preliminary Physiological Characterization of Temperature-Sensitive Mutants of Vesicular Stomatitis Virus

Medical Research Council Virology Unit, Institute of Virology, Glasgow, Scotland

ABSTRACT

Different temperature-sensitive mutants of vesicular stomatitis virus have been characterized in terms of their ability to induce synthesis of viral ribonucleic acid (RNA) in BHK-21 cells at 39 C (the restrictive temperature for these mutants). Mutants belonging to complementation groups I and IV (and probably II) did not induce actinomycin-resistant RNA synthesis in infected cells incubated at 39 C. All three mutants comprising complementation group III induced viral RNA synthesis at 39 C. The temperature sensitivity of the defective viral functions has also been studied by temperature-shift experiments. The functions associated with the mutants of groups I, II, and IV were required early, whereas the function associated with the group III mutants was not required until a late stage of the viral cycle. The heat sensitivity of extracellular virion was not correlated with complementation group.

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