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J Virol. 1969 October; 4(4): 408-415
Copyright © 1969 American Society for Microbiology. All Rights Reserved.

Site of Host Restriction of Simian Virus 40 Mutants in an Established African Green Monkey Kidney Cell Line

Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20014

ABSTRACT

A previously described large-plaque morphology mutant of SV40 (SV-L) in primary African green monkey kidney (AGMK) cells has been shown to be restricted in the established AGMK line CV-1. The site of restriction is an early step in infection, involving the virus particle. A block in penetration or uncoating has been tentatively proposed. Restriction is observed in a number of other established lines, including monkey, human, and mouse. Independent large-plaque mutants were isolated in AGMK and their properties were compared with SV-L (temperature restriction, host restriction, and virion antigen). They can be separated into two classes. Both are restricted on CV-1, though to a lesser degree than SV-L. Further-more, both are coat mutants as determined by immunological analysis of their virions, suggesting a relationship between coat mutants associated with large-plaque morphology in AGMK and host restriction in established cell lines. Temperature restriction is seen with one but not the other of the mutants.

¹ Recipient of Public Health Service Special Fellowship (NIAID) 1 F3-A1-39. Present address: Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, Md. 20014.