Reference: van Heusden GPH (2023) RNAseq analysis of mutants in coding and non-coding transcription of phosphate genes in the yeast Saccharomyces cerevisiae. Genomics 115(5):110672

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Abstract


In the yeast Saccharomyces cerevisiae phosphate starvation induces the expression of PHO genes, including PHO84, encoding an high-affinity phosphate transporter, and SPL2, encoding a regulatory protein. PHO84 is down-regulated by antisense transcription. Here, using strand-specific RNAseq the effect is studied of mutations related to sense and antisense transcription of phosphate genes. Replacement of the transcriptional terminator of PHO84 by that of CYC1 resulted, unexpectedly, in an increased antisense transcription and a strongly reduced sense transcription of PHO84 and a strongly reduced SPL2 expression. The expression of unrelated genes was altered as well. The data suggest that antisense transcription of PHO84 and not the Pho84 transporter affects the expression of SPL2. Deletion of the two putative binding sites for Ume6 in the SPL2 promoter or deletion of UME6 differently affected SPL2 expression, suggesting that Ume6 regulates SPL2 by a mechanism different from a simple binding to the putative Ume6 binding sites.

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van Heusden GPH
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