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Related Concept Videos

Transcription01:10

Transcription

157.1K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
157.1K
Transcription01:17

Transcription

33.6K
Transcription is the synthesis of RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in correctly synthesizing messenger RNA (mRNA). Transcriptional regulation is responsible for the differentiation of different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds of RNA Molecules
In eukaryotes,...
33.6K
Transcription Factors02:16

Transcription Factors

82.9K
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...
82.9K
Eukaryotic Transcription Inhibitors01:52

Eukaryotic Transcription Inhibitors

11.1K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
11.1K
Eukaryotic Transcription Activators02:42

Eukaryotic Transcription Activators

12.9K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.9K
Master Transcription Regulators02:23

Master Transcription Regulators

7.8K
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...
7.8K

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Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue
10:22

Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue

Published on: September 8, 2023

2.1K

Imaging transcriptional dynamics.

Bomyi Lim1

  • 1Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.

Current Opinion in Biotechnology
|March 5, 2018
PubMed
Summary
This summary is machine-generated.

High-resolution imaging reveals that gene transcription is a stochastic process, known as transcriptional bursting. This bursting is influenced by chromatin, transcription factors, and enhancer-promoter interactions, highlighting complex gene regulation dynamics.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Recent technological advancements in imaging allow for high spatiotemporal resolution visualization of molecular processes.
  • Understanding the dynamics of gene expression is crucial for deciphering cellular functions and responses.

Purpose of the Study:

  • To review and synthesize recent findings on transcriptional dynamics using advanced imaging techniques.
  • To elucidate the complex regulatory mechanisms governing gene transcription.

Main Methods:

  • Quantitative imaging techniques enabling visualization of nascent transcripts and individual protein molecules.
  • Analysis of stochasticity and transcriptional bursting in gene expression.
  • Investigation of factors modulating transcriptional activity, including chromatin, transcription factors, and enhancer-promoter interactions.

Main Results:

  • Transcriptional activity exhibits stochastic behavior, characterized by transcriptional bursting.
  • Transcriptional bursting is modulated by chromatin environments, transcription factor concentrations, and enhancer-promoter interactions.
  • Transcription factors and RNA polymerases exhibit distinct intracellular movement kinetics and can form dynamic clusters to facilitate transcriptional initiation.

Conclusions:

  • Transcriptional regulation is a highly dynamic and complex process.
  • Quantitative imaging provides unprecedented insights into the stochastic nature of gene expression.
  • The interplay of various molecular components and their dynamic behavior dictates transcriptional outcomes.