Functional domains and upstream activation properties of cloned human TATA binding protein

Michael Gregory Peterson, Naoko Tanese, B. Franklin Pugh, Robert Tjian

Research output: Contribution to journalArticle

310 Scopus citations

Abstract

The TATA binding protein, TFIID, plays a central role in the initiation of eukaryotic mRNA synthesis. Here, we present a human cDNA clone for this factor. Comparison of its predicted protein sequence with those from Drosophila and yeast reveals a highly conserved carboxyl-terminal 180 amino acids. By contrast, the amino-terminal region of TFIID has diverged in both sequence and length. A striking feature of the human protein is a stretch of 38 glutamine residues in the NH2-terminal region. Expression of human TFIID in both Escherichia coli and HeLa cells produces a protein that binds specifically to a TATA box and promotes basal transcription; the conserved COOH-terminal portion of the protein is sufficient for both of these activities. Recombinant TFIID forms a stable complex on a TATA box either alone or in combination with either of the general transcription factors, TFTIA or TFIIB. Full-length recombinant TFiID is able to support Sp1 activated transcription in a TFIID-depleted nuclear extract, while a deletion of the NH2-terminal half of the protein is not. These results indicate the importance of the NH2-terminal region for upstream activation functions and suggest that additional factors (co-activators) are required for mediating interactions with specific regulators.

Original languageEnglish (US)
Pages (from-to)1625-1630
Number of pages6
JournalScience
Volume248
Issue number4963
DOIs
StatePublished - 1990

All Science Journal Classification (ASJC) codes

  • General

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