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Related Concept Videos

Prokaryotic Transcriptional Activators and Repressors01:58

Prokaryotic Transcriptional Activators and Repressors

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.
Transcription of prokaryotic...
Prokaryotic Transcriptional Activators and Repressors01:58

Prokaryotic Transcriptional Activators and Repressors

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.
Transcription of prokaryotic...
Prokaryotic Gene Structure and Organization01:28

Prokaryotic Gene Structure and Organization

Prokaryotic genomes exhibit a streamlined organization of coding and non-coding regions essential for gene expression and protein synthesis. While coding regions contain the genetic instructions for proteins or functional RNAs, non-coding regions regulate the precise transcription and translation of these genes.Coding Regions: Proteins and RNAsThe primary coding regions, known as structural genes, include sequences transcribed into messenger RNA (mRNA) and ultimately translated into...
Constitutive and Regulated Gene Expression01:27

Constitutive and Regulated Gene Expression

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...
Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Coordination of Gene Expression Processes in Bacteria01:29

Coordination of Gene Expression Processes in Bacteria

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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Reliably Engineering and Controlling Stable Optogenetic Gene Circuits in Mammalian Cells
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Engineering prokaryotic gene circuits.

Konstantinos Michalodimitrakis1, Mark Isalan

  • 1EMBL/CRG Systems Biology Research Unit, Centre for Genomic Regulation (CRG), UPF, Barcelona, Spain.

FEMS Microbiology Reviews
|November 20, 2008
PubMed
Summary
This summary is machine-generated.

Synthetic gene circuit engineering advances rapidly, moving from transcription to RNA and metabolic systems. New multicellular prokaryotic networks also emerge, driving innovation in biotechnology and developmental biology.

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Area of Science:

  • Synthetic biology
  • Molecular engineering
  • Systems biology

Background:

  • Synthetic gene circuit engineering is a rapidly growing field.
  • Current systems are dominated by prokaryotic transcription networks.
  • Emerging networks utilize RNA, metabolic components, and cell-cell communication.

Purpose of the Study:

  • To review rational and combinatorial design of synthetic gene networks.
  • To discuss progress in in vitro evolution for functional systems.
  • To explore the potential of metabolic engineering and multicellular prokaryotic systems.

Main Methods:

  • Examination of rational and combinatorial design approaches.
  • Review of in vitro evolution techniques.
  • Analysis of RNA-level and metabolic circuit engineering.
  • Discussion of cell-cell communication networks in prokaryotes.

Main Results:

  • Synthetic gene circuits are increasingly complex, incorporating RNA and metabolic elements.
  • Metabolic engineering offers potential for biotechnology applications.
  • Multicellular prokaryotic networks are being developed for spatial pattern formation.
  • Advances in gene synthesis, sequencing, and computation accelerate design.

Conclusions:

  • Synthetic gene circuit engineering is rapidly advancing across multiple levels (transcription, RNA, metabolism).
  • Prokaryotic systems show potential for biotechnology and developmental biology applications.
  • Interdisciplinary advances are driving unprecedented progress in synthetic gene network design.