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Related Concept Videos

Coordination of Gene Expression Processes in Bacteria01:29

Coordination of Gene Expression Processes in Bacteria

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The DNA replication, transcription, and translation processes are intricately coupled in bacteria, allowing efficient gene expression and rapid protein synthesis. While this physical and functional coordination is advantageous, it introduces challenges that bacteria overcome through specific regulatory mechanisms.Coupling of Replication, Transcription, and TranslationThe coupling of replication, transcription, and translation is a hallmark of bacterial gene expression. As the replisome unwinds...
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Constitutive and Regulated Gene Expression01:27

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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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The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
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Translational Regulation01:29

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Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
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Gene Regulation in Microbial Communities: Quorum Sensing01:28

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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Contemporary Tools for Regulating Gene Expression in Bacteria.

Ross Kent1, Neil Dixon1

  • 1Manchester Institute of Biotechnology and School of Chemistry, University of Manchester, Manchester, UK.

Trends in Biotechnology
|November 5, 2019
PubMed
Summary

New bacterial gene expression tools offer fine-tuned control for bioproduction and sensing. These systems enhance predictability and productivity while minimizing negative impacts on cell viability using novel regulatory mechanisms.

Keywords:
de-coupling growth and productiondynamic regulationgenetic circuit designregulatory tools

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Area of Science:

  • Synthetic Biology
  • Molecular Biology
  • Biotechnology

Background:

  • Advances in understanding gene expression control have driven the development of new genetic tools.
  • Contemporary bacterial gene expression systems are emerging with improved fine-tuning capabilities.

Purpose of the Study:

  • To review novel gene regulation tools for bacterial systems.
  • To discuss their design, integration, and biotechnological applications.

Main Methods:

  • Review of current literature on gene expression control mechanisms.
  • Analysis of regulatory tools operating across the central dogma of molecular biology.
  • Discussion of biodesign approaches and synthetic burden considerations.

Main Results:

  • Emergence of bacterial gene expression systems enabling fine-tuned control.
  • Improved predictability and maximisation of specific productivity.
  • Minimisation of deleterious effects on cell viability.

Conclusions:

  • Novel gene regulation tools enhance bacterial system performance for bioproduction, control, and sensing.
  • Integration of these tools allows for precise control over gene expression.
  • Future applications in biotechnology are facilitated by these advancements.