The TAFs of TFIID bind and rearrange the topology of the TATA-less RPS5 promoter

Sarah N. Le, Christopher R. Brown, Stacy Harvey, Hinrich Boeger, Hans Elmlund, Dominika Elmlund

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The general transcription factor TFIID is a core promoter selectivity factor that recognizes DNA sequence elements and nucleates the assembly of a pre-initiation complex (PIC). The mechanism by which TFIID recognizes the promoter is poorly understood. The TATA-box binding protein (TBP) is a subunit of the multi-protein TFIID complex believed to be key in this process. We reconstituted transcription from highly purified components on a ribosomal protein gene (RPS5) and discovered that TFIID∆TBP binds and rearranges the promoter DNA topology independent of TBP. TFIID∆TBP binds ~200 bp of the promoter and changes the DNA topology to a larger extent than the nucleosome core particle. We show that TBP inhibits the DNA binding activities of TFIID∆TBP and conclude that the complete TFIID complex may represent an auto-inhibited state. Furthermore, we show that the DNA binding activities of TFIID∆TBP are required for assembly of a PIC poised to select the correct transcription start site (TSS).

Original languageEnglish
Article number3290
Number of pages12
JournalInternational Journal of Molecular Sciences
Issue number13
Publication statusPublished - 4 Jul 2019


  • DNA topology
  • Housekeeping gene transcription
  • Ribosomal protein 5
  • TAF complex
  • TBP-associated factor

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