TAFs are components of the transcription factor IID (TFIID) complex that are essential for mediating regulation of RNA polymerase transcription. Regulates the genes involved in ubiquitin-dependent proteolysis during the progression of M-phase of mitosis (By similarity). Component of the TFIID and SAGA complexes. TFIID is composed of TATA binding protein (TBP) and a number of TBP-associated factors (TAFs) (By similarity). Belongs to the WD repeat TAF5 family.