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Related Concept Videos

Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

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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...
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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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Regulation of Expression Occurs at Multiple Steps02:24

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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.
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Gene expression in prokaryotes is governed by constitutive and regulated systems, allowing cells to balance the production of essential proteins with adaptive responses to environmental changes.Constitutive Gene ExpressionConstitutive, or housekeeping, genes are continuously expressed as they encode proteins vital for fundamental cellular processes. These include enzymes for glycolysis, ribosomal components for protein synthesis, and proteins involved in DNA replication. Their constant...
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Structure of a Gene01:30

Structure of a Gene

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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.
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Updated: Nov 23, 2025

An Optogenetic Method to Control and Analyze Gene Expression Patterns in Cell-to-cell Interactions
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An Optogenetic Method to Control and Analyze Gene Expression Patterns in Cell-to-cell Interactions

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Light Control of Gene Expression Dynamics.

Akihiro Isomura1,2,3

  • 1Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto, Japan. aisomura@infront.kyoto-u.ac.jp.

Advances in Experimental Medicine and Biology
|January 5, 2021
PubMed
Summary
This summary is machine-generated.

Optogenetics enables precise optical control over gene expression dynamics in mammalian cells. This technology investigates the causal role of transcriptional patterns in biological events.

Keywords:
Cell–cell communicationGAVPOGenetic oscillationLOV proteinsNotch signaling

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • Live-cell imaging reveals complex transcriptional activity patterns.
  • Understanding the functional significance of these dynamic patterns is crucial.

Purpose of the Study:

  • To introduce optogenetic methods for controlling gene expression dynamics.
  • To explore the causative roles of gene expression patterns in biological events.

Main Methods:

  • Development and application of optogenetic tools for optical control of gene expression.
  • Utilizing these tools in mammalian cell systems.

Main Results:

  • Optogenetic methods provide precise temporal and spatial control over gene expression.
  • Enables investigation into the functional consequences of dynamic transcriptional patterns.

Conclusions:

  • Optogenetics offers a powerful approach to dissect the role of gene expression dynamics in cellular processes.
  • Future research can leverage these methods to establish causality between gene expression patterns and biological outcomes.