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Illustration of an activator. In molecular biology, a transcription factor (TF) (or sequence-specific DNA-binding factor) is a protein that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence.
The SunTag activator system uses the dCas9 protein, which is modified to be linked with the SunTag. The SunTag is a repeating polypeptide array that can recruit multiple copies of antibodies. Through attaching transcriptional factors on the antibodies, the SunTag dCas9 activating complex amplifies its recruitment of transcriptional factors.
Figure 1. Example of a natural transcription factor up-regulating gene expression. 1. The transcription factors (labeled activator proteins) bind to their specific DNA sequence (labeled enhancers). 2. The transcription factors recruit other proteins and transcription factors to form a protein complex which binds to the gene promoter. 3.
E2F is a group of genes that encodes a family of transcription factors (TF) in higher eukaryotes.Three of them are activators: E2F1, 2 and E2F3a.Six others act as repressors: E2F3b, E2F4-8.
The TCF/LEF family (T cell factor/lymphoid enhancer factor family) is a group of genes that encode transcription factors which bind to DNA through a SOX-like high mobility group domain. They are involved in the Wnt signaling pathway , particularly during embryonic [ 2 ] and stem-cell development, [ 3 ] but also had been found to play a role in ...
The transactivation domain or trans-activating domain (TAD) is a transcription factor scaffold domain which contains binding sites for other proteins such as transcription coregulators. These binding sites are frequently referred to as activation functions (AFs). [1] TADs are named after their amino acid composition.
Activator protein 1 (AP-1) is a transcription factor that regulates gene expression in response to a variety of stimuli, including cytokines, growth factors, stress, and bacterial and viral infections. [1] AP-1 controls a number of cellular processes including differentiation, proliferation, and apoptosis. [2]
Signal transducer and activator of transcription 6 (STAT6) is a transcription factor that belongs to the Signal Transducer and Activator of Transcription (STAT) family of proteins. [5] The proteins of STAT family transmit signals from a receptor complex to the nucleus and activate gene expression .
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