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The Eukaryotic Promoter Region

The Eukaryotic Promoter Region

The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...

Reporter Genes

Reporter Genes

Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.

Prokaryotic Transcriptional Activators and Repressors

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...

Bacterial Transcription

Bacterial Transcription

RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:

Transcription Initiation

Transcription Initiation

Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...

Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...

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Related Experiment Video

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DNA-affinity-purified Chip DAP-chip Method to Determine Gene Targets for Bacterial Two component Regulatory Systems

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Published on: July 21, 2014

Promotech: a general tool for bacterial promoter recognition.

Ruben Chevez-Guardado¹, Lourdes Peña-Castillo^2,3

¹Department of Computer Science, Memorial University of Newfoundland, 230 Elizabeth Ave, St. John's, Newfoundland, A1C 5S7, Canada.

|November 18, 2021

Summary

This summary is machine-generated.

We developed Promotech, a machine-learning tool for identifying bacterial promoters across many species. Promotech significantly improves upon existing methods for bacterial promoter recognition.

Keywords:

Bacterial promoter Bioinformatics Machine learning Microbiology Promoter prediction Promoter recognition

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Last Updated: Oct 13, 2025

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Published on: July 21, 2014

Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1

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Published on: May 27, 2016

Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions

Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions

Published on: June 28, 2018

Area of Science:

Genomics
Bioinformatics
Computational Biology

Background:

Promoters are crucial genomic regions regulating gene transcription.
Existing computational tools for bacterial promoter identification often lack cross-species applicability.
Accurate promoter identification is essential for understanding gene regulation.

Purpose of the Study:

To develop and evaluate a novel machine-learning method, Promotech, for accurate bacterial promoter recognition.
To assess Promotech's performance across a wide range of bacterial species.
To compare Promotech against existing promoter prediction tools.

Main Methods:

Development of a machine-learning-based approach (Promotech).
Comparative analysis of Promotech against five established promoter prediction methods.
Performance evaluation using metrics such as the area under the precision-recall curve (AUPRC).

Main Results:

Promotech demonstrates superior performance compared to existing methods.
The method achieves higher accuracy in identifying bacterial promoters.
Promotech shows effectiveness across diverse bacterial species.

Conclusions:

Promotech offers a robust and broadly applicable solution for bacterial promoter identification.
The developed tool advances the field of computational genomics and bacterial gene regulation.
Promotech provides a valuable resource for researchers studying bacterial transcription.