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Cellular senescence has been identified as "a dynamic and reversible process regulated by (in)activation of a predetermined enhancer landscape controlled by the pioneer transcription factor AP-1", which "defines the organizational principles of the transcription factor network that drives the transcriptional programme of senescent cells". [15] [16]
The AP-1 binding site, also known as the AP-1 promoter site, is a DNA sequence to which AP-1 transcription factors are able to bind. [1] The AP-1 binding site, in humans, has a nucleotide sequence of ATGAGTCAT, where A corresponds to adenine , T corresponds to thymine , G corresponds to guanine , and C corresponds to cytosine .
These genes encode leucine zipper proteins that can dimerize with proteins of the JUN family, thereby forming the transcription factor complex AP-1. As such, the FOS proteins have been implicated as regulators of cell proliferation, differentiation, and transformation.
Network motifs can be regarded as repetitive topological patterns when dividing a big network into small blocks. Previous analysis found several types of motifs that appeared more often in gene regulatory networks than in randomly generated networks. [13] [14] [15] As an example, one such motif is called feed-forward loops, which consist of ...
These genes encode leucine zipper proteins that can dimerize with proteins of the JUN family (e.g., c-Jun, JunD), thereby forming the transcription factor complex AP-1. As such, the FOS proteins have been implicated as regulators of cell proliferation, differentiation, and transformation. [5]
Transcription factor Jun is a protein that in humans is encoded by the JUN gene. c-Jun, in combination with protein c-Fos, forms the AP-1 early response transcription factor. It was first identified as the Fos-binding protein p39 and only later rediscovered as the product of the JUN gene. c-jun was the first oncogenic transcription factor ...
The best known class of these complexes is composed of NFAT and AP-1 or other bZIP proteins. This NFAT:AP-1 complex binds to the conventional Rel-family proteins DNA binding sites and is involved in gene transcription in immune cells. [13] [3]
Activating transcription factor, ATF, is a group of bZIP transcription factors, which act as homodimers or heterodimers with a range of other bZIP factors. [1] First, they have been described as members of the CREB/ATF family, [2] whereas it turned out later that some of them might be more similar to AP-1-like factors such as c-Jun or c-Fos. [3]