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Rad53 downregulates mitotic gene transcription by inhibiting the transcriptional activator Ndd1.

ABSTRACT: The 33 genes in the Saccharomyces cerevisiae mitotic CLB2 transcription cluster have been known to be downregulated by the DNA damage checkpoint for many years. Here, we show that this is mediated by the checkpoint kinase Rad53 and the dedicated transcriptional activator of the cluster, Ndd1. Ndd1 is phosphorylated in response to DNA damage, which blocks recruitment to promoters and leads to the transcriptional downregulation of the CLB2 cluster. Finally, we show that downregulation of Ndd1 is an essential function of Rad53, as a hypomorphic ndd1 allele rescues RAD53 deletion.

SUBMITTER: Edenberg ER

PROVIDER: S-EPMC3911491 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature

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Rad53 downregulates mitotic gene transcription by inhibiting the transcriptional activator Ndd1.

Edenberg Ellen R ER Vashisht Ajay A Benanti Jennifer A JA Wohlschlegel James J Toczyski David P DP

Molecular and cellular biology 20131209 4

The 33 genes in the Saccharomyces cerevisiae mitotic CLB2 transcription cluster have been known to be downregulated by the DNA damage checkpoint for many years. Here, we show that this is mediated by the checkpoint kinase Rad53 and the dedicated transcriptional activator of the cluster, Ndd1. Ndd1 is phosphorylated in response to DNA damage, which blocks recruitment to promoters and leads to the transcriptional downregulation of the CLB2 cluster. Finally, we show that downregulation of Ndd1 is a ...[more]

PMID: 24324011

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