Reference: Xia ZX and Ao SZ (1999) Functional Analysis of the Upstream Sequence of PHO81 Gene of Saccharomyces cerevisiae. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 31(1):83-89

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Abstract


Deletion analysis on the fused PHO81-lacZ gene revealed two important regions in the upstream sequences of PHO81 gene -401 -289 bp and -1 012 -801 bp. They did not share higher similarity with the upstream regions of PHO5 and PHO84 gene, except that -401 -289 bp contains the 5'-CACGTG/T-3' motif, which was found among the upstream regions of PHO5 and PHO84 gene and was the core sequence of PHO4 binding site it also contains A/T-rich segments flanking the motif, which may be PHO2 binding sites. This suggests that the -401 -289 bp of the upstream region of PHO81 gene may contain upstream activation sequence (UAS), and -1 012 -801 bp may contain upstream enhancer sequence. The gel retardation assays of the -1 012 -801 bp was performed using yeast total protein extract, and the results showed that there was an unknown protein factor binding at the region.

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Xia ZX, Ao SZ
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