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A transcriptional activator is a protein (transcription factor) that increases transcription of a gene or set of genes. [1] Activators are considered to have positive control over gene expression, as they function to promote gene transcription and, in some cases, are required for the transcription of genes to occur.
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.
21676 Ensembl ENSG00000187079 ENSMUSG00000055320 UniProt P28347 P30051 RefSeq (mRNA) NM_021961 NM_001166584 NM_001166585 NM_009346 NM_175559 RefSeq (protein) NP_068780 NP_001160056 NP_001160057 NP_033372 Location (UCSC) Chr 11: 12.67 – 12.94 Mb Chr 7: 112.28 – 112.51 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Transcriptional enhancer factor TEF-1 also known as TEA domain ...
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 ...
A transcription factor is a protein that binds to specific DNA sequences (enhancer or promoter), either alone or with other proteins in a complex, to control the rate of transcription of genetic information from DNA to messenger RNA by promoting (serving as an activator) or blocking (serving as a repressor) the recruitment of RNA polymerase.
See: Transcriptional Activator, Transcription Factor. Transcriptional Activators are protein domains or whole proteins linked to dCas9 or sgRNAs that assist in the recruitment of important co-factors as well as RNA Polymerase for transcription of the gene(s) targeted by the system. In order for a protein to be made from the gene that encodes it ...
The fnr gene product, a pleiotropic transcriptional activator, is required for expression of the operons that encode nitrate and fumarate reductase complexes. FNR, an efficient respiratory oxidant induces synthesis of nitrate respiratory enzymes and simultaneously represses synthesis of enzymes for respiring the lower-potential acceptors.
The Rb tumor suppressor protein (pRb) binds to the E2F1 transcription factor preventing it from interacting with the cell's transcription machinery. In the absence of pRb, E2F1 (along with its binding partner DP1) mediates the trans-activation of E2F1 target genes that facilitate the G1/S transition and S-phase.