Transcription Factor Regulation
Transcription Factor Regulation - Related Videos
07:23
Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
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Cited by 3 •
2016
Herein we propose a strategy to study the effect of a transcription factor of interest on the microRNA transcriptome using publically available data, computational resources and high throughput data from microRNA arrays after transfecting cells with small hairpin (sh)RNA targeting a transcription factor of interest.
02:16
Transcription Factors
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2019
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
02:23
Master Transcription Regulators
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2020
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
02:35
Transcription Elongation Factors
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2020
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene. The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA into a...
02:13
Cooperative Binding of Transcription Regulators
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2020
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
FAQs
Regulatory signals can change a transcription factor’s abundance, activity, localization, or interactions with cofactors. These changes alter how effectively the factor acts at target promoters and enhancers, either supporting or limiting access to the transcriptional machinery. Because several regulatory properties can shift in response to one cue, cells can connect inputs to graded or condition-dependent gene-expression outputs.
At target promoters and enhancers, transcription factors can either recruit or inhibit the transcriptional machinery. Cofactors influence these effects through protein interactions, while localization determines whether a factor is positioned to act on relevant DNA. Together, these mechanisms help explain how the same regulatory system can produce different transcriptional outcomes under different intracellular or environmental conditions.
Bioengineers can tune gene expression by modifying more than whether a factor is present. Changing its abundance, activity, localization, or cofactor interactions provides multiple control points, allowing a response to be adjusted rather than treated as a simple binary switch. This tunability is useful when engineered cells must respond precisely to environmental or intracellular cues.
Transcription factor networks are important because they link regulatory inputs to coordinated changes in gene expression. In bioengineering, this perspective supports the design of engineered cells and tissues whose behavior can be connected to environmental or intracellular cues. It also helps researchers reason about how multiple regulatory relationships may contribute to precise, tunable outcomes rather than isolated gene responses.
A practical design process begins by identifying the environmental or intracellular cue that should control gene expression. Researchers then consider which transcription factor properties, such as abundance, activity, localization, or cofactor interactions, can connect that cue to target promoters or enhancers. This framework supports the construction of systems that produce intended, adjustable transcriptional responses.
Transcription factor regulation supports several bioengineering goals, including programming cell behavior, constructing synthetic gene circuits, and optimizing the production of biological products. The same regulatory principles also guide the design of engineered cells and tissues. In each case, the system links a defined environmental or intracellular input to changes in gene expression that serve the engineering objective.