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. 1980 Mar;33(3):1138–1150. doi: 10.1128/jvi.33.3.1138-1150.1980

Late modifications of simian virus 40 chromatin during the lytic cycle occur in an immature form of virion.

F La Bella, C Vesco
PMCID: PMC288647  PMID: 6245264

Abstract

Two main modifications of the simian virus 40 chromatin were found to occur during the lytic cycle. One was the progressive increase in the acetylation level in the four non-H1 histones as the 75S deoxynucleoprotein complexes (minichromosomes) became assembled into heavier structures. The other was the final elimination from viral chromatin of histone H1. An important stage in the course of these changes was represented by an intracellular simian virus 40 particle, in which the virus-coded proteins were already assembled, but properties distinct from those of mature virions were still present. This particle resembled the mature virions in morphology, sedimentation rate, and buoyant density. It was distinguished by the instability, the presence of histone H1, the uptake of radioactive acetate, and the lower infectivity. Its significance appears to be that of an immature virion on the basis of these characters and of the consistent kinetic behavior during the lytic cycle.

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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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