Reference: Hahn S, et al. (1989) Yeast TATA-binding protein TFIID binds to TATA elements with both consensus and nonconsensus DNA sequences. Proc Natl Acad Sci U S A 86(15):5718-22

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Abstract


The DNA binding properties of the yeast TATA element-binding protein TFIID were investigated. The affinity (apparent equilibrium dissociation constant) of TFIID for the adenovirus major late promoter consensus TATA element is 2 x 10(-9) M, a value similar to the affinity of gene-specific regulatory proteins for their binding sites. TFIID binding is highly specific and recognizes nonspecific sites with approximately 10(5)-fold lower affinity. Despite this specificity, TFIID also binds with high affinity to several TATA elements that do not match the consensus TATA sequences (TATAAA and TATATA): the yeast LEU2 TATA (TATTATTTA), the simian virus 40 TATA (CTTATTTAT), and the yeast CYC1 -10 TATA (TTATACATT) all bound TFIID. Furthermore, TFIID was active in promoting transcription in vitro from the nonconsensus TATA elements. Thus, contrary to previous suggestions, the existence of nonconsensus TATA elements does not itself indicate the existence of multiple TATA-binding factors.

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Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
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Hahn S, Buratowski S, Sharp PA, Guarente L
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