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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
Cooperative Binding of Transcription Regulators02:13

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
Global Regulatory Systems01:28

Global Regulatory Systems

Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
Cis-regulatory Sequences02:02

Cis-regulatory Sequences

Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Combinatorial Gene Control02:33

Combinatorial Gene Control

Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
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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DNA-affinity-purified Chip (DAP-chip) Method to Determine Gene Targets for Bacterial Two component Regulatory Systems
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Technical considerations in using DNA microarrays to define regulons.

Virgil A Rhodius1, Joseph T Wade

  • 1Department of Microbiology and Immunology, University of California at San Francisco, San Francisco, CA 94143, USA. virgil.rhodius@ucsf.edu

Methods (San Diego, Calif.)
|October 29, 2008
PubMed
Summary
This summary is machine-generated.

This study explores bacterial gene expression regulation using transcription profiling and ChIP-chip. These methods reveal how regulatory proteins and RNAs control transcription, providing a comprehensive view of bacterial regulatory systems.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genomics

Background:

  • Bacterial gene expression is primarily regulated at the transcription level.
  • Numerous regulatory proteins and RNAs control bacterial transcription.
  • Microarrays offer a powerful approach for studying transcription on a genomic scale.

Purpose of the Study:

  • To describe the application of transcription profiling and ChIP-chip for investigating bacterial transcriptional regulation.
  • To elucidate the interplay between regulatory events and protein-DNA interactions in bacteria.

Main Methods:

  • Transcription profiling: Assesses the overall outcome of regulatory events on gene expression.
  • Chromatin immunoprecipitation followed by sequencing (ChIP-chip): Identifies specific protein-DNA interactions genome-wide.
  • Integrated analysis of both methods to understand regulatory networks.

Main Results:

  • Transcription profiling quantifies changes in gene expression resulting from regulatory processes.
  • ChIP-chip pinpoints the binding sites of regulatory proteins on bacterial DNA.
  • Combining these techniques provides a detailed understanding of transcriptional regulatory systems.

Conclusions:

  • Transcription profiling and ChIP-chip are complementary techniques for studying bacterial gene regulation.
  • These methods offer a powerful approach to dissecting complex regulatory networks in bacteria.
  • The integrated use of these tools enhances our understanding of genomic regulatory systems.