Reference: Flygare J, et al. (1996) Expression of the human RAD51 gene during the cell cycle in primary human peripheral blood lymphocytes. Biochim Biophys Acta 1312(3):231-6

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Abstract


The S. cerevisiae RAD51 gene product exerts important functions in meiotic and mitotic recombination, as well as in the repair of DNA double-strand breaks. We have studied the expression of the human RAD51 (HsRAD51) gene in primary human peripheral blood lymphocytes (PBLs). The HsRAD51 mRNA level increased three fold in mitogen stimulated PBLs, with a peak in the late S phase. A five fold increase of HsRAD51 protein levels was observed in late G2. Specific inhibition of DNA synthesis with aphidicolin did not block the induction of the HsRAD51 protein, indicating that HsRAD51 expression is independent of DNA replication. In contrast, after inhibition of RNA synthesis with actinomycin D and protein synthesis with cycloheximide, the HsRAD51 protein level decreased rapidly. Taken together, these results indicate that the HsRAD51 gene is transcriptionally regulated in human PBLs, and exerts its function during the late S and G2 phases of the cell cycle.

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Journal Article | Research Support, Non-U.S. Gov't
Authors
Flygare J, Benson F, Hellgren D
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