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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...

Master Transcription Regulators

Master Transcription Regulators

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...

Cell Specific Gene Expression

Cell Specific Gene Expression

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...

Cell Specific Gene Expression

Cell Specific Gene Expression

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...

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Related Experiment Video

Updated: Feb 20, 2026

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues

Published on: June 3, 2016

Understanding Tissue-Specific Gene Regulation.

Abhijeet Rajendra Sonawane¹, John Platig², Maud Fagny²

¹Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.

|October 26, 2017

Summary

This summary is machine-generated.

Tissue specificity in gene regulation arises from context-dependent pathways, not just transcription factor expression. Regulatory network edges show higher tissue specificity than genes, revealing how transcriptional control shapes distinct tissue functions.

Keywords:

GTEx gene expression gene regulation network biology network medicine regulatory networks tissue specificity transcription factors transcriptional regulation transcriptome

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Last Updated: Feb 20, 2026

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Area of Science:

Genomics
Molecular Biology
Systems Biology

Background:

Human tissues perform common functions but exhibit distinct gene expression patterns.
Tissue-specific gene expression implies unique regulatory programs govern cellular identity.

Purpose of the Study:

To investigate gene expression and regulatory network specificity across 38 human tissues.
To understand how transcription factor networks contribute to tissue-specific gene regulation.

Main Methods:

Analysis of gene expression data from the Genotype-Tissue Expression (GTEx) project.
Network analysis to identify transcription factor-target gene connections and their tissue specificity.
Gene set enrichment analysis to evaluate regulatory control of tissue-specific functions.

Main Results:

Regulatory network edges (transcription factor to target gene connections) are more tissue-specific than individual genes (nodes).
Transcription factors are less likely to be tissue-specific than their target genes.
Tissue-specific gene regulation appears largely independent of transcription factor expression levels.
Tissue-specific genes occupy bottleneck positions in networks due to variable targeting and non-canonical interactions.

Conclusions:

Tissue specificity is driven by context-dependent regulatory pathways.
Transcriptional control, mediated by specific network configurations, underlies tissue-specific processes.
Understanding these regulatory paths is key to deciphering tissue identity and function.