TAF4

Last update 08 May 2025

Basic Info

Synonyms

RNA polymerase II TBP-associated factor subunit C, TAF(II)130, TAF(II)135

+ [13]

Introduction

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:10594036, PubMed:33795473, PubMed:8942982). TAF4 may maintain an association between the TFIID and TFIIA complexes, while bound to the promoter, together with TBP, during PIC assembly (PubMed:33795473). Potentiates transcriptional activation by the AF-2S of the retinoic acid, vitamin D3 and thyroid hormone (PubMed:9192867).

100 Clinical Results associated with TAF4

100 Translational Medicine associated with TAF4

0 Patents (Medical) associated with TAF4

Literatures (Medical) associated with TAF4

01 Dec 2025·Current Genetics

Transcriptional activation and coactivator binding by yeast Ino2 and human proto-oncoprotein c-Myc

Article

Author: Schüller, Hans-Joachim ; Wierzbicka, Wiktoria ; Lettow, Julia ; Wendegatz, Eva-Carina

AbstractBasic helix-loop-helix domains in yeast regulatory proteins Ino2 and Ino4 mediate formation of a heterodimer which binds to and activates expression of phospholipid biosynthetic genes. The human proto-oncoprotein c-Myc (Myc) and its binding partner Max activate genes important for cellular proliferation and contain functional domains structure and position of which strongly resembles Ino2 and Ino4. Since Ino2—Myc and Ino4—Max may be considered as orthologs we performed functional comparisons in yeast. We demonstrate that Myc and Max could be stably synthesized in S. cerevisiae and together significantly activated a target gene of Ino2/Ino4 but nevertheless were unable to functionally complement an ino2 ino4 double mutant. We also map two efficient transcriptional activation domains in the N-terminus of Myc (TAD1: aa 1–41 and TAD2: aa 91–140), corresponding to TAD positions in Ino2. We finally show that coactivators such as TFIID subunits Taf1, Taf4, Taf6, Taf10 and Taf12 as well as ATPase subunits of chromatin remodelling complexes Swi2, Sth1 and Ino80 previously shown to interact with TADs of Ino2 were also able to bind TADs of Myc, supporting the view that heterodimers Ino2/Ino4 and Myc/Max are evolutionary related but have undergone transcriptional rewiring of target genes.

08 Feb 2025·Nucleic Acids Research

Allovalent scavenging of activation domains in the transcription factor ANAC013 gears transcriptional regulation

Article

Author: O’Shea, Charlotte ; Morffy, Nicolas ; Skriver, Karen ; Strader, Lucia C ; Theisen, Frederik Friis ; Blackledge, Martin ; Due, Amanda D ; Delaforge, Elise ; Kragelund, Birthe B

AbstractTranscriptional regulation involves interactions between transcription factors, coregulators, and DNA. Intrinsic disorder is a major player in this regulation, but mechanisms driven by disorder remain elusive. Here, we address molecular communication within the stress-regulating Arabidopsis thaliana transcription factor ANAC013. Through high-throughput screening of ANAC013 for transcriptional activation activity, we identify three activation domains within its C-terminal intrinsically disordered region. Two of these overlap with acidic islands and form dynamic interactions with the DNA-binding domain and are released, not only upon binding of target promoter DNA, but also by nonspecific DNA. We show that independently of DNA binding, the RST (RCD--SRO--TAF4) domain of the negative regulator RCD1 (Radical-induced Cell Death1) scavenges the two acidic activation domains positioned vis-à-vis through allovalent binding, leading to dynamic occupation at enhanced affinity. We propose an allovalency model for transcriptional regulation, where sequentially close activation domains in both DNA-bound and DNA-free states allow for efficient regulation. The model is likely relevant for many transcription factor systems, explaining the functional advantage of carrying sequentially close activation domains.

01 Feb 2024·Journal of Cellular Physiology

Participation of the TBP‐associated factors (TAFs) in cell differentiation

Review

Author: Luna-Arias, Juan Pedro ; Castro-Muñozledo, Federico

AbstractThe understanding of the mechanisms that regulate gene expression to establish differentiation programs and determine cell lineages, is one of the major challenges in Developmental Biology. Besides the participation of tissue‐specific transcription factors and epigenetic processes, the role of general transcription factors has been ignored. Only in recent years, there have been scarce studies that address this issue. Here, we review the studies on the biological activity of some TATA‐box binding protein (TBP)‐associated factors (TAFs) during the proliferation of stem/progenitor cells and their involvement in cell differentiation. Particularly, the accumulated evidence suggests that TAF4, TAF4b, TAF7L, TAF8, TAF9, and TAF10, among others, participate in nervous system development, adipogenesis, myogenesis, and epidermal differentiation; while TAF1, TAF7, TAF15 may be involved in the regulation of stem cell proliferative abilities and cell cycle progression. On the other hand, evidence suggests that TBP variants such as TBPL1 and TBPL2 might be regulating some developmental processes such as germ cell maturation and differentiation, myogenesis, or ventral specification during development. Our analysis shows that it is necessary to study in greater depth the biological function of these factors and its participation in the assembly of specific transcription complexes that contribute to the differential gene expression that gives rise to the great diversity of cell types existing in an organism. The understanding of TAFs' regulation might lead to the development of new therapies for patients which suffer from mutations, alterations, and dysregulation of these essential elements of the transcriptional machinery.

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TAF4

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