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Related Concept Videos

Operon Model01:23

Operon Model

The operon model represents a fundamental mechanism of gene regulation in prokaryotes, enabling coordinated expression of genes involved in related metabolic or functional pathways. Operons consist of structural genes, a promoter, and an operator, with transcription regulated by repressors, activators, and small effector molecules.Structure and Function of OperonsAn operon is a cluster of structural genes transcribed together under the control of a single promoter. The promoter region...
Operons02:09

Operons

Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related protein-coding genes. Operons use a single promoter sequence to initiate transcription of a gene cluster (i.e., a group of structural genes) into a single mRNA molecule. The terminator sequence ends transcription. An operator sequence, located between the promoter and structural genes, prohibits the operon’s transcriptional activity if bound by a repressor...
Operons02:09

Operons

Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related protein-coding genes. Operons use a single promoter sequence to initiate transcription of a gene cluster (i.e., a group of structural genes) into a single mRNA molecule. The terminator sequence ends transcription. An operator sequence, located between the promoter and structural genes, prohibits the operon’s transcriptional activity if bound by a repressor...
Repressible Operon: trp Operon01:21

Repressible Operon: trp Operon

The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
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...

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Related Experiment Video

Updated: Jun 7, 2026

Standardized Modular Assembly of Polycistronic Operons with Modular Cloning (MoClo) using the In-Cloning toolkit
06:28

Standardized Modular Assembly of Polycistronic Operons with Modular Cloning (MoClo) using the In-Cloning toolkit

Published on: September 2, 2025

PPO: predictor for prokaryotic operons.

Li-Yeh Chuang1, Jui-Hung Tsai, Cheng-Hong Yang

  • 1Department of Chemical Engineering & Institute of Biotechnology and Chemical Engineering, I-Shou University, Kaohsiung, Taiwan.

Bioinformatics (Oxford, England)
|October 30, 2010
PubMed
Summary
This summary is machine-generated.

We developed a Prokaryotic Operon Predictor (PPO) for whole-genome operon prediction. This tool offers flexible algorithm choices and user-friendly features for analyzing prokaryotic genomes.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Operons are key functional units in prokaryotic genomes.
  • Accurate operon prediction is crucial for understanding gene regulation.
  • Existing methods may lack flexibility or user-friendliness.

Purpose of the Study:

  • To present a novel operon predictor for prokaryotic genomes.
  • To provide a user-friendly web server and database for operon prediction.
  • To offer multiple prediction algorithms and adjustable parameters.

Main Methods:

  • Developed the Prokaryotic Operon Predictor (PPO) software.
  • Integrated prediction algorithms such as binary particle swarm optimization (BPSO) and genetic algorithms (GA).
  • Created a web server with adjustable parameters, graphic visualization, and database queries.

Main Results:

  • PPO can predict operons across entire prokaryotic genomes.
  • The predictor offers a selection of algorithms and adjustable settings.
  • Features include visualization, database integration, and access to verified operons.

Conclusions:

  • PPO is a versatile and accessible tool for prokaryotic operon prediction.
  • The web server and database enhance usability and data exploration.
  • PPO facilitates research in prokaryotic gene organization and regulation.