Yeast TAF(II)145 functions as a core promoter selectivity factor, not a general coactivator

Cell. 1997 Aug 22;90(4):615-24. doi: 10.1016/s0092-8674(00)80523-1.

Abstract

In yeast, TATA box binding protein associated factors (TAF(II)s) are dispensable for transcription of most genes. Here we use differential display to identify a small subset of yeast genes whose transcription in vivo requires yTAF(II)145. Promoter-mapping studies reveal, unexpectedly, that the region of a gene that renders it yTAF(II)145-dependent is not the upstream activating sequence, which contains the activator-binding sites, but rather the core promoter. In fact, a core promoter requiring yTAF(II)145 retained that requirement when its transcription was directed by several unrelated upstream activating sequences and even in the absence of an activator. Taken together, our results indicate that yTAF(II)145 functions in recognition and selection of core promoters by a mechanism not involving upstream activators.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Cell Cycle
  • DNA-Binding Proteins / metabolism
  • DNA-Binding Proteins / physiology*
  • Genes, Fungal
  • Promoter Regions, Genetic*
  • RNA, Fungal / metabolism
  • RNA, Messenger / metabolism
  • Saccharomyces cerevisiae / genetics*
  • Saccharomyces cerevisiae Proteins*
  • TATA Box
  • TATA-Binding Protein Associated Factors*
  • TATA-Box Binding Protein
  • Transcription Factor TFIID*
  • Transcription Factors / metabolism
  • Transcription Factors / physiology*
  • Transcription, Genetic

Substances

  • DNA-Binding Proteins
  • RNA, Fungal
  • RNA, Messenger
  • Saccharomyces cerevisiae Proteins
  • TAF1 protein, S cerevisiae
  • TATA-Binding Protein Associated Factors
  • TATA-Box Binding Protein
  • Transcription Factor TFIID
  • Transcription Factors