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Arnone JT and McAlear MA  (2011) Adjacent Gene Pairing Plays a Role in the Coordinated Expression of Ribosome Biogenesis Genes MPP10 and YJR003C in Saccharomyces cerevisiae. Eukaryot Cell 10(1):43-53

Abstract: The rRNA and ribosome biogenesis (RRB) regulon from Saccharomyces cerevisiae contains some two hundred genes, the expression of which are tightly regulated under changing cellular conditions. RRB gene promoters are enriched for the RRPE and PAC consensus motifs, and a significant fraction of RRB genes are found as adjacent gene pairs. A genetic analysis of the MPP10 promoter revealed that both the RRPE and PAC motifs are important for coordinated expression of MPP10 following heat shock, osmotic stress and glucose replenishment. The association of the RRPE-binding factor Stb3 with the MPP10 promoter was found to increase after glucose replenishment, and decrease following heat shock. Similarly, bulk histone H3 clearing and histone H4K12 acetylation levels at the MPP10 promoter were found to increase or decrease following glucose replenishment or heat shock respectively. Interestingly, substitutions in the PAC and RRPE sequences at the MPP10 promoter were also found to impact the regulated expression of the adjacent RRB gene YJR003, whose promoter lies in the opposite orientation and some 3.8 kb away. Furthermore, the regulated expression YJR003C could be disrupted by inserting a reporter cassette that increased its distance from MPP10. Given that a high incidence of gene pairing was also found within the ribosomal protein (RP) and RRB regulons across different yeast species, our results indicate that immediate, adjacent positioning of genes can be functionally significant for their co-regulated expression.

Status: Published Type: Journal Article PubMed ID: 21115740

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Topics Genes linked to topics
EBP2 HHF1 HHF2 HHT1 HHT2 MPP10 STB3 YJR003C
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