TAF6
Function
The TFIID basal transcription factor complex plays a major role in the initiation of RNA polymerase II (Pol II)-dependent transcription (PubMed:33795473). TFIID recognizes and binds promoters with or without a TATA box via its subunit TBP, a TATA-box-binding protein, and promotes assembly of the pre-initiation complex (PIC) (PubMed:33795473). The TFIID complex consists of TBP and TBP-associated factors (TAFs), including TAF1, TAF2, TAF3, TAF4, TAF5, TAF6, TAF7, TAF8, TAF9, TAF10, TAF11, TAF12 and TAF13 (PubMed:33795473). The TFIID complex structure can be divided into 3 modules TFIID-A, TFIID-B, and TFIID-C (PubMed:33795473). TAF6 homodimer connects TFIID modules, forming a rigid core (PubMed:33795473).
Isoform 4
Transcriptional regulator which acts primarily as a positive regulator of transcription (PubMed:20096117, PubMed:29358700). Recruited to the promoters of a number of genes including GADD45A and CDKN1A/p21, leading to transcriptional up-regulation and subsequent induction of apoptosis (PubMed:11583621). Also up-regulates expression of other genes including GCNA/ACRC, HES1 and IFFO1 (PubMed:18628956). In contrast, down-regulates transcription of MDM2 (PubMed:11583621). Acts as a transcriptional coactivator to enhance transcription of TP53/p53-responsive genes such as DUSP1 (PubMed:20096117). Can also activate transcription and apoptosis independently of TP53 (PubMed:18628956). Drives apoptosis via the intrinsic apoptotic pathway by up-regulating apoptosis effectors such as BCL2L11/BIM and PMAIP1/NOXA (PubMed:29358700).
Involvement in disease
Alazami-Yuan syndrome
ALYUS
An autosomal recessive syndrome reminiscent of Cornelia de Lange syndrome and characterized by delayed psychomotor development with intellectual disability, hypotonia, microcephaly, short stature, poor speech, and dysmorphic features.
None
The disease is caused by variants affecting the gene represented in this entry.
Post-translational modifications
Isoform 4
In cells undergoing apoptosis, cleaved in a caspase-dependent manner to produce a 40 kDa product.
Sequence Similarities
Belongs to the TAF6 family.
Cellular localization
- Nucleus
- Isoform 4
- Nucleus
Alternative names
TAF2E, TAFII70, TAF6, Transcription initiation factor TFIID subunit 6, RNA polymerase II TBP-associated factor subunit E, Transcription initiation factor TFIID 70 kDa subunit, Transcription initiation factor TFIID 80 kDa subunit, TAF(II)70, TAFII-70, TAF(II)80, TAFII-80, TAFII80