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Regulation of Expression at Multiple Steps

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of 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...

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...

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...

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...

What is Gene Expression?

What is Gene Expression?

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...

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Related Experiment Video

Updated: May 23, 2026

Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome

Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome

Published on: June 15, 2016

Population differences in transcript-regulator expression quantitative trait loci.

Pierre R Bushel¹, Ray McGovern, Liwen Liu

¹Biostatistics Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, United States of America. bushel@niehs.nih.gov

|April 6, 2012

Summary

This summary is machine-generated.

This study introduces Transcript-Regulator Quantitative Trait Loci (TReQTLs) to identify SNPs impacting gene expression. TReQTL analysis successfully linked specific SNPs to master regulators, revealing potential roles in disease pathways.

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Area of Science:

Genetics
Systems Biology
Bioinformatics

Background:

Gene expression quantitative trait loci (eQTLs) link single nucleotide polymorphisms (SNPs) to diseases.
Master regulators influence disease manifestation through downstream target genes that are co-expressed and share biological functions.

Purpose of the Study:

To develop and apply a method for identifying SNPs associated with the targets of transcript-regulators (TRs), termed TReQTLs.
To identify TReQTLs in European (CEU) and African (YRI) populations and explore their potential roles in biological pathways.

Main Methods:

Utilized multivariate regression analysis correlating gene expression of known TR targets with SNP data.
Screened for TReQTLs in CEU and YRI HapMap populations using a nominal p-value threshold of <1×10(-6).
Investigated pathway enrichment and gene interaction networks for identified TReQTLs.

Main Results:

Identified 234 TReQTLs in CEU and 154 in YRI at a nominal p-value <1×10(-6).
Discovered 36 independent tag SNPs in CEU and 39 in YRI affecting downstream targets of 25 and 36 TRs, respectively.
At 45% FDR, one cis-acting TReQTL was found in each population, including a SNP linked to CREM targets in CEU and a SNP linked to hsa-miR-125a targets in YRI.

Conclusions:

TReQTL analysis is a practical approach to screen for SNPs associated with transcript-regulator targets.
Identified specific TReQTLs and their associated regulators, suggesting potential roles in complex biological processes.
Pathway analysis of a Foxp3 TReQTL indicated involvement of TNF, NF-kappaB, and GPCR signaling in its functional regulation, highlighting potential pleiotropic effects.