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Related Concept Videos

General Transcription Factors

General Transcription Factors

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...

Transcription Factors

Transcription Factors

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...

Transcription Factors

Transcription Factors

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...

Structure of a Gene

Structure of a Gene

A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...

Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

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Related Experiment Video

Updated: Jul 2, 2026

CRISPR-Mediated Reorganization of Chromatin Loop Structure

CRISPR-Mediated Reorganization of Chromatin Loop Structure

Published on: September 14, 2018

Joining the loops: beta-globin gene regulation.

Daan Noordermeer¹, Wouter de Laat

¹Department of Cell Biology and Genetics, Erasmus Medical Center, 3000 CA Rotterdam, The Netherlands.

|September 4, 2008

Summary

This summary is machine-generated.

The locus control region (LCR) and active beta-globin genes form an active chromatin hub (ACH). This structure is crucial for high-level gene expression and understanding nuclear organization in gene regulation.

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Measurement of Heme Synthesis Levels in Mammalian Cells

Measurement of Heme Synthesis Levels in Mammalian Cells

Published on: July 9, 2015

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Last Updated: Jul 2, 2026

CRISPR-Mediated Reorganization of Chromatin Loop Structure

CRISPR-Mediated Reorganization of Chromatin Loop Structure

Published on: September 14, 2018

Measurement of Heme Synthesis Levels in Mammalian Cells

Measurement of Heme Synthesis Levels in Mammalian Cells

Published on: July 9, 2015

Area of Science:

Genetics
Molecular Biology
Epigenetics

Background:

The mammalian beta-globin locus contains multiple genes and regulatory elements controlling gene expression during development.
Gene expression undergoes dynamic changes, known as "switching," throughout development.
The locus control region (LCR) is a key regulatory element essential for high-level beta-globin gene expression.

Purpose of the Study:

To discuss the significance of active chromatin hub (ACH) formation.
To provide an overview of proteins involved in chromatin looping at the beta-globin locus.
To evaluate the relationship between nuclear organization and beta-globin gene expression.

Main Methods:

The study discusses existing findings and literature on chromatin structure and gene regulation.
It focuses on the physical interactions between regulatory elements and genes.
Analysis involves understanding protein involvement in chromatin looping.

Main Results:

The LCR and active beta-globin genes physically interact, forming an "active chromatin hub" (ACH).
ACH formation is essential for achieving high-level expression of beta-globin genes.
Specific proteins mediate chromatin looping, connecting the LCR to downstream genes.

Conclusions:

ACH formation is a critical mechanism for regulating beta-globin gene expression.
Nuclear organization, specifically chromatin looping, plays a vital role in gene regulation at this locus.
Understanding these interactions provides insights into developmental gene switching and nuclear architecture.