Recognition of the TATA box by the TATA-binding protein (TBP) is a highly regulated step in RNA polymerase II-dependent transcription. Several proteins have been proposed to regulate TBP activity, yet the TBP domains responsive to all these regulators have not been defined. Here we describe a new class of TBP mutants that increase transcription from core promoters in vivo. The majority of these...

TFIID-a complex of TATA-binding protein (TBP) and TBP-associated factors (TAFs)-is a central component of the Pol II promoter recognition apparatus. Recent studies have revealed significant downregulation of TFIID subunits in terminally differentiated myocytes, hepatocytes and adipocytes. Here, we report that TBP protein levels are tightly regulated by the ubiquitin-proteasome system. Using an ...

We have developed an approach that enables nonradioactive, ultrasensitive (attamole sensitivity) sitespecific protein–protein photocrosslinking, and we have applied the approach to the analysis of interactions of a-helix 2 (H2) of human TATA-element binding protein (TBP) with general transcription factor TFIIA and transcriptional repressor NC2. We have found that TBP H2 can be crosslinked to TF...

Tri-n-butyl phosphate (TBP) is an important extractant for heavy metal ions. The microscopic structure of TBP/n-octane mixtures as a function of concentration of TBP is examined through atomistic molecular dynamics simulations. A weak association between TBP molecules both in pure TBP as well as in the octane solution is established. In dilute TBP/n-octane solutions, TBP molecules are inhomogen...

We have developed an approach that enables nonradioactive, ultrasensitive (attamole sensitivity) site-specific protein-protein photocrosslinking, and we have applied the approach to the analysis of interactions of alpha-helix 2 (H2) of human TATA-element binding protein (TBP) with general transcription factor TFIIA and transcriptional repressor NC2. We have found that TBP H2 can be crosslinked ...

Spinocerebellar ataxia type 17 (SCA17) involves the expression of a polyglutamine (polyQ) expanded TATA-binding protein (TBP), a general transcription initiation factor. TBP interacts with other protein factors, including high mobility group box 1 (HMGB1), to regulate gene expression. Previously, our proteomic analysis of soluble proteins prepared from mutant TBP (TBP/Q61) expressing cells reve...

The TATA-binding protein (TBP) plays a central role in eukaryotic gene transcription. Given its key function in transcription initiation, TBP was initially thought to be an invariant protein. However, studies showed that TBP expression is upregulated by oncogenic signaling pathways. Furthermore, depending on the cell type, small increases in cellular TBP amounts can induce changes in cellular g...

The TATA box binding protein TBP plays a universally important role in eukaryotic nuclear transcription. By mutagenesis, we have discovered a solvent-exposed surface of the structured TBP core domain that is important for inhibition of the DNA binding and DNA-bending activities of full-length wild-type TBP. Full-length wild-type TBP initially binds the TATA box to form an unstable complex conta...