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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...

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.
Commonly used reporter...

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.
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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...

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Related Experiment Video

Updated: May 11, 2026

In vivo Application of the REMOTE-control System for the Manipulation of Endogenous Gene Expression

In vivo Application of the REMOTE-control System for the Manipulation of Endogenous Gene Expression

Published on: March 29, 2019

Honey bee promoter sequences for targeted gene expression.

C Schulte¹, G Leboulle, M Otte

¹Institute of Evolutionary Genetics, Heinrich Heine University Duesseldorf, Duesseldorf, Germany. christina-schulte@gmx.de

Insect Molecular Biology

|May 15, 2013

Summary

Researchers identified key honey bee promoter sequences for controlling gene expression. This breakthrough is crucial for developing transgenic tools to study honey bee genetics and complex behaviors.

Keywords:

Apis mellifera electroporation gene expression honey bee promoters insect cell culture

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Area of Science:

Genetics
Molecular Biology
Entomology

Background:

Honey bees (Apis mellifera) exhibit complex behaviors and social structures, yet their genetic underpinnings remain largely unexplored.
The absence of stable transgenic tools hinders genetic manipulation and functional gene studies in honey bees.

Purpose of the Study:

To identify and characterize honey bee promoter sequences capable of driving gene expression.
To establish foundational elements for developing transgenic methods in Apis mellifera.

Main Methods:

Identification of promoter sequences from honey bee genes: Am-actin5c, elp2l, Am-hsp83, and Am-hsp70.
Reporter gene assays in Sf21 insect cells to test promoter activity.
Electroporation experiments in the honey bee brain to assess neuron-specific promoter function.

Main Results:

Four promoter sequences (Am-actin5c, elp2l, Am-hsp83, Am-hsp70) were identified.
Am-actin5c, Am-hsp83, and Am-hsp70 promoters successfully drove reporter gene expression in Sf21 cells.
The elp2l promoter demonstrated neuron-specific gene expression in the honey bee brain.

Conclusions:

Identified promoter sequences provide essential tools for future transgenic studies in honey bees.
These promoters enable controlled gene expression, facilitating research into honey bee genetics and phenotypes.
This work represents a significant step towards enabling genetic manipulation in Apis mellifera.