Reference: Soushko M and Mitchell AP (2000) An RNA-binding protein homologue that promotes sporulation-specific gene expression in Saccharomyces cerevisiae. Yeast 16(7):631-9

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Abstract


Prior studies have shown that S. cerevisiae rim4 mutations cause reduced expression of a sporulation-specific reporter gene and sporulation. We report here that RIM4 (ORF YHL024W) is a putative RNA-binding protein of the RRM class that is expressed at elevated levels early in meiosis. Mutations in the two RRMs reduce or abolish sporulation and, in some cases, cause reduced Rim4p expression. RIM4 is required for expression of early and middle sporulation-specific genes. Unlike other meiotic regulatory genes, RIM4 is required for full gene activation through both the Ime1p and Ime2p pathways. The rim4Delta defect in activation by Ime2p is suppressed by a hyperactive Ime2p derivative. These observations argue that Rim4p may act upstream of Ime2p, perhaps in a nutritional sensing pathway.

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Journal Article
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Soushko M, Mitchell AP
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