Transcription Factor Binding
Transcription Factor Binding - Related Videos
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...
05:00
Fluorescence Anisotropy to Determine Transcription Factor-DNA Binding Affinity
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2025
This video describes high-performance fluorescence anisotropy that helps to monitor the interaction between transcription factors and DNA. The assay monitors the interactions of a fluorophore-labeled DNA molecule with its specific transcription factor by measuring the degree of polarization due to molecular rotation or anisotropy of the fluorophore-labeled DNA.
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...
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.
FAQs
Recognition depends on structural contacts between the regulatory protein and a short DNA motif. These contacts involve both particular nucleotide bases and the DNA backbone, allowing some sequences to be favored over others. The resulting selectivity helps different transcription factors regulate distinct sets of genes rather than affecting gene expression uniformly throughout the genome.
A DNA motif may support recognition, but its accessibility can strengthen or limit whether binding occurs. Chromatin state, cofactors, and chemical modifications influence how available a regulatory site is to the protein. Consequently, identical or related motifs can produce different regulatory outcomes in different cellular conditions, contributing to context-dependent gene expression.
The effect depends on the regulatory machinery recruited or excluded at the bound site. A transcription factor can help bring transcriptional machinery to a gene or block that machinery from acting. This switch-like influence connects DNA-level recognition with changes in gene activity, affecting cell identity, developmental programs, and responses to environmental signals.
Chromatin immunoprecipitation and sequencing provides a way to map genomic locations associated with a transcription factor. Those locations can be examined to identify regulatory relationships and organize genes into broader control systems. The resulting binding maps help researchers investigate how regulatory interactions are distributed across the genome rather than studying gene expression alone.
Binding information helps connect regulatory proteins with the genes they may influence, supporting reconstruction of gene regulatory networks. These networks provide a broader view of coordinated control than isolated binding events. In biology research, that organization can clarify how groups of genes are regulated during differentiation, development, or changes in cellular state.
Changes in regulatory binding can help explain how gene-control programs differ between biological conditions. Mapping these interactions therefore supports investigations of disease mechanisms, cellular differentiation, and responses to therapy. The approach is especially informative when researchers need to relate altered regulatory activity to wider changes in gene networks rather than to a single gene in isolation.