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Related Concept Videos

DNA Packaging

DNA Packaging

Bacterial Transcription

Bacterial Transcription

RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:

Transcription Elongation Factors

Transcription Elongation Factors

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...

The DNA Replication Fork

The DNA Replication Fork

Transcription

Transcription

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,...

Transcription

Transcription

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...

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Related Experiment Video

Updated: Apr 16, 2026

Measuring the Kinetics of mRNA Transcription in Single Living Cells

Measuring the Kinetics of mRNA Transcription in Single Living Cells

Published on: August 25, 2011

Transcription rates in DNA brushes.

Tetsuya Yamamoto¹, S A Safran

¹Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel. tetsujava@hotmail.com.

|March 5, 2015

Summary

This summary is machine-generated.

We developed a theory for DNA transcription rates using transcription (TX) dipoles. This model explains how enzyme movement affects transcription and predicts changes based on dipole orientation, impacting RNAP concentrations.

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Area of Science:

Biophysics
Polymer Science
Molecular Biology

Background:

Transcription (TX) is a fundamental biological process involving RNA polymerase (RNAP) enzymes moving along DNA.
Understanding TX rates in confined environments like DNA brushes is crucial for molecular biology and nanotechnology.
Previous models often simplified enzyme dynamics or polymer conformations.

Purpose of the Study:

To theoretically predict transcription rates in DNA brushes.
To introduce and analyze the concept of transcription (TX) dipoles.
To investigate the impact of RNAP motion and dipole orientation on TX rates.

Main Methods:

Developed a theoretical model incorporating TX dipoles representing RNAP as correlated sources and sinks.
Solved the relevant diffusion equation to analyze RNAP concentration modulation.
Compared theoretical predictions with experimental data for DNA brushes.

Main Results:

TX rates are predicted to change significantly with the inversion of TX dipole orientation.
TX dipoles modulate RNAP concentrations in the surrounding solution.
Experimental comparisons suggest non-uniform DNA chain distributions in some DNA brush systems.

Conclusions:

The TX dipole concept provides a novel framework for understanding transcription in DNA brushes.
RNAP's unidirectional motion and its effect on local concentrations are key factors influencing TX rates.
The findings challenge assumptions about polymer brush conformations and highlight the importance of enzyme dynamics.