TAF5

Initiation of transcription by RNA polymerase II requires the activities of more than 70 polypeptides. The protein that coordinates these activities is transcription factor IID (TFIID), which binds to the core promoter to position the polymerase properly, serves as the scaffold for assembly of the remainder of the transcription complex, and acts as a channel for regulatory signals. TFIID is composed of the TATA-binding protein (TBP) and a group of evolutionarily conserved proteins known as TBP-associated factors or TAFs. TAFs may participate in basal transcription, serve as coactivators, function in promoter recognition or modify general transcription factors (GTFs) to facilitate complex assembly and transcription initiation. This gene encodes an integral subunit of TFIID associated with all transcriptionally competent forms of that complex.

Full Name

TATA-Box Binding Protein Associated Factor 5

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, PubMed:8758937, PubMed:8942982, PubMed:9045704).
The TFIID complex structure can be divided into 3 modules TFIID-A, TFIID-B, and TFIID-C (PubMed:33795473).
TAF5 is involved in two modules of TFIID, in TFIID-A together with TAF3 and TBP, and in TFIID-B with TAF8 (PubMed:33795473).
Involved in contacts between TFIID and TFIIF in the PIC (PubMed:33795473).

Biological Process

Biological Process DNA-templated transcription initiationIDA:UniProtKB1 Publication
Biological Process histone H3 acetylationIDA:ComplexPortal1 Publication
Biological Process monoubiquitinated histone deubiquitinationIDA:ComplexPortal1 Publication
Biological Process monoubiquitinated histone H2A deubiquitinationIDA:ComplexPortal1 Publication
Biological Process mRNA transcription by RNA polymerase IIIDA:ComplexPortal1 Publication
Biological Process positive regulation of DNA-templated transcriptionIC:ComplexPortal1 Publication
Biological Process positive regulation of transcription initiation by RNA polymerase IIIDA:ComplexPortal1 Publication
Biological Process protein phosphorylationIDA:ComplexPortal1 Publication
Biological Process regulation of DNA repairIC:ComplexPortal1 Publication
Biological Process regulation of transcription by RNA polymerase IIIDA:ComplexPortal1 Publication
Biological Process RNA polymerase II preinitiation complex assemblyIPI:ComplexPortal1 Publication
Biological Process transcription initiation at RNA polymerase II promoterIDA:UniProtKB2 Publications

Cellular Location

Nucleus