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Interplay of TBP Inhibitors in Global Transcriptional Control.

机译:TBP抑制剂在全球转录控制中的相互作用。

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The TATA binding protein (TBP) is required for the expression of nearly all genes and is highly regulated both positively and negatively. Here, we use DNA microarrays to explore the genome-wide interplay of several TBP-interacting inhibitors in the yeast Saccharomyces cerevisiae. Our findings suggest the following: The NC2 inhibitor turns down, but not off, highly active genes. Autoinhibition of TBP through dimerization contributes to transcriptional repression, even at repressive subtelomeric regions. The TAND domain of TAF1 plays a primary inhibitory role at very few genes, but its function becomes widespread when other TBP interactions are compromised. These findings reveal that transcriptional output is limited in part by a collaboration of different combinations of TBP inhibitory mechanisms.
机译:TATA结合蛋白(TBP)是几乎所有基因表达所必需的,并且受到积极和消极的调节。在这里,我们使用DNA微阵列来探索酵母酿酒酵母中几种TBP相互作用抑制剂的全基因组相互作用。我们的发现表明以下几点:NC2抑制剂关闭但不关闭高度活跃的基因。通过二聚化对TBP的自动抑制甚至在阻抑性亚端粒区域也有助于转录抑制。 TAF1的TAND结构域在极少数基因上起主要的抑制作用,但是当其他TBP相互作用受到损害时,其功能将变得广泛。这些发现表明,转录输出部分受到TBP抑制机制的不同组合的合作的限制。

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