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. 1983 Oct;80(19):5827–5831. doi: 10.1073/pnas.80.19.5827

A host protein (La) binds to a unique species of minus-sense leader RNA during replication of vesicular stomatitis virus.

J Wilusz, M G Kurilla, J D Keene
PMCID: PMC390168  PMID: 6310594

Abstract

Baby hamster kidney cells infected with the minus-strand RNA virus vesicular stomatitis virus (VSV) were found to contain three small viral leader RNA species of the minus sense. The longest minus-strand leader RNA was 54 nucleotides long and was complexed with the host cell La protein that was immunoprecipitated by antisera from patients with systemic lupus erythematosus. The La protein is normally found associated with RNA polymerase III transcripts in their unprocessed form. Shorter minus-strand leader RNA species of 45-48 nucleotides were more abundant but were not associated with the La protein. Unlike the plus-strand leader RNA of VSV, the minus-strand leader RNAs were not detected in the nucleus in any form. The minus-strand leader RNAs accumulated gradually throughout the infection and could not be found in association with the viral nucleocapsid protein. The sequence required for La protein binding on the 54-nucleotide-long minus-strand leader is similar to that at the 3' end of the La protein binding-plus-strand leader RNA and, thus, we propose a role for the La protein in the replication of VSV.

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Selected References

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