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. 1984 Feb;4(2):351-7.
doi: 10.1128/mcb.4.2.351-357.1984.

Rapid reversible changes in the rate of histone gene transcription and histone mRNA levels in mouse myeloma cells

R A Graves, W F Marzluff

Rapid reversible changes in the rate of histone gene transcription and histone mRNA levels in mouse myeloma cells

R A Graves et al. Mol Cell Biol. 1984 Feb.

Abstract

The levels of histone mRNAs are reduced 90 to 95% after treatment of mouse myeloma cells with inhibitors of DNA synthesis which disrupt deoxynucleotide metabolism. In contrast, novobiocin, which inhibits DNA synthesis but does not alter deoxynucleotide metabolism, did not alter histone mRNA levels. Upon reversing the inhibition by fluorodeoxyuridine by feeding with thymidine, histone mRNA levels are restored to control levels within 40 to 60 min. The rate of histone gene transcription is reduced 75 to 80% within 10 min after treatment with fluorodeoxyuridine and increased to control levels within 10 min after refeeding with thymidine. Inhibition of protein synthesis with cycloheximide or puromycin in cells which had been treated with fluorodeoxyuridine resulted in an increase of histone mRNA levels. This was partly due to an increase in the rate of transcription. The data indicate that both transcription and mRNA degradation are linked to deoxynucleotide metabolism. Continued protein synthesis is necessary for maintaining the inhibition of histone gene transcription.

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