Abstract
The New Jersey serotype of vesicular stomatitis virus (VSV-NJ) was found to synthesize a minus strand leader RNA of 44–46 bases long and a plus strand leader RNA of 47–50 bases long in infected cells. The minus strand leader RNA of VSV-NJ was found associated with the host cell La protein in infected cells by immunoprecipitation with antisera from patients with systemic lupus erythematosus. These results differ from those reported previously ( J. Wilusz, M. G. Kurilla, and J. D. Keene (1983). Proc. Natl. Acad. Sci USA 80, 5827–5831) for the similarly sized species of minus strand leader RNA made by the Indiana serotype of VSV (VSV-IND). Despite sequence differences between the 3′ ends of the plus strand leader RNAs of the two serotypes, the plus strand leader RNA of VSV-NJ was found to have a pattern of La protein accumulation similar to that reported previously for the plus strand leader RNA of VSV-IND. These results provide additional support for a role for La protein in VSV replication and help further delineate the sequence requirements for La protein binding to VSV leader RNAs.
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