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What is Gene Expression?01:42

What is Gene Expression?

195.1K
Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
195.1K
What is Gene Expression?01:36

What is Gene Expression?

11.1K
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
11.1K
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

16.3K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.3K
mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
6.6K
Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

24.7K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
24.7K
Master Transcription Regulators02:23

Master Transcription Regulators

7.7K
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...
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Related Experiment Video

Updated: Jan 22, 2026

Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells
10:34

Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells

Published on: April 14, 2010

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Visualizing transcription: key to understanding gene expression dynamics.

Ineke Brouwer1, Tineke L Lenstra1

  • 1Division of Gene Regulation, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands.

Current Opinion in Chemical Biology
|July 9, 2019
PubMed
Summary
This summary is machine-generated.

Genes in living cells transcribe in bursts, alternating between activity and inactivity. Recent live-cell imaging reveals detailed characteristics and regulatory mechanisms of these transcriptional bursts.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Gene transcription in living cells occurs in bursts, characterized by periods of activity and inactivity.
  • Advances in live-cell imaging provide high-resolution insights into transcriptional bursting dynamics.
  • Understanding the regulation of these bursts is crucial for comprehending gene expression control.

Purpose of the Study:

  • To review the latest findings on transcription dynamics in living cells.
  • To discuss recent advancements in understanding the regulation of transcriptional bursting.
  • To highlight key regulatory mechanisms including transcription factor binding, enhancer-promoter interactions, and transcriptional machinery clustering.

Main Methods:

  • Live-cell imaging techniques
  • Single-molecule resolution studies
  • Analysis of transcription factor binding kinetics
  • Investigating enhancer-promoter interactions
  • Studying clustering and phase separation of transcriptional machinery

Main Results:

  • Transcriptional activity is inherently burst-like, not continuous.
  • Detailed visualization of upstream regulatory events in bursting is now possible.
  • Transcription factor binding kinetics, enhancer-promoter interactions, and machinery clustering are key regulatory factors.

Conclusions:

  • Transcriptional bursting is a fundamental mode of gene expression.
  • Recent technological advances have significantly improved our understanding of bursting regulation.
  • Future research will likely focus on the interplay of these regulatory mechanisms to fully elucidate gene expression control.