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. 1982 Jun;42(3):986–995. doi: 10.1128/jvi.42.3.986-995.1982

Black Beetle Virus: Messenger for Protein B Is a Subgenomic Viral RNA

Paul D Friesen 1, Roland R Rueckert 1
PMCID: PMC256932  PMID: 16789225

Abstract

Black beetle virus induces the synthesis of three new proteins, protein A (molecular weight, 104,000), protein α (molecular weight, 47,000), and protein B (molecular weight, 10,000), in infected Drosophila cells. Two of these proteins, A and α, are known to be encoded by black beetle virus RNAs 1 and 2, respectively, extracted from virions. We found that RNA extracted from infected cells directed the synthesis of all three proteins when it was added to a cell-free protein-synthesizing system. When polysomal RNA was fractionated on a sucrose density gradient, the messengers for proteins A and α cosedimented with viral RNAs 1 (22S) and 2 (15S), respectively. However, the messenger for protein B was a 9S RNA (RNA 3) not found in purified virions. Like the synthesis of viral RNAs 1 and 2, intracellular synthesis of RNA 3 was not affected by the drug actinomycin D at concentrations which blocked synthesis of host cell RNA. This indicated that RNA 3 is a virus-specific subgenomic RNA and, therefore, that protein B is a virus-encoded protein.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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