Reference: Donczew R and Hahn S (2018) Mechanistic Differences in Transcription Initiation at TATA-Less and TATA-Containing Promoters. Mol Cell Biol 38(1)

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Abstract


A yeast in vitro system was developed that is active for transcription at both TATA-containing and TATA-less promoters. Transcription with extracts made from cells depleted of TFIID subunit Taf1 demonstrated that promoters of both classes are TFIID dependent, in agreement with recent in vivo findings. TFIID depletion can be complemented in vitro by additional recombinant TATA binding protein (TBP) at only the TATA-containing promoters. In contrast, high levels of TBP did not complement Taf1 depletion in vivo and instead repressed transcription from both promoter types. We also demonstrate the importance of the TATA-like sequence found at many TATA-less promoters and describe how the presence or absence of the TATA element is likely not the only feature that distinguishes these two types of promoters.

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Donczew R, Hahn S
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