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Related Concept Videos

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...
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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...
Epistasis Analysis01:09

Epistasis Analysis

Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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.
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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...
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...

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Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
14:06

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

Gene-centered regulatory network mapping.

Albertha J M Walhout1

  • 1Program in Gene Function and Expression and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA.

Methods in Cell Biology
|November 29, 2011
PubMed
Summary
This summary is machine-generated.

Researchers are developing methods to map gene regulatory networks in the C. elegans worm. This involves understanding how transcription factors (TFs) control gene expression for developmental processes.

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

Published on: July 21, 2014

Area of Science:

  • Developmental Biology
  • Genomics
  • Molecular Biology

Background:

  • The Caenorhabditis elegans genome has approximately 20,000 protein-coding genes, with 940 encoding regulatory transcription factors (TFs).
  • Understanding gene regulation is crucial for deciphering complex biological processes in multicellular organisms.
  • Gene regulatory networks (GRNs) govern the spatiotemporal expression of genes, influencing cellular function.

Purpose of the Study:

  • To discuss methods for delineating gene regulatory networks in C. elegans.
  • To highlight the importance of understanding gene-gene and gene-regulator interactions.
  • To provide insights into the control of gene expression in a model organism.

Main Methods:

  • Focus on gene-centered yeast one-hybrid (Y1H) assays.
  • Mapping interactions between non-coding genic regions (e.g., promoters) and regulatory transcription factors (TFs).
  • Discussing approaches applicable to various model organisms and human biology.

Main Results:

  • The study outlines methodologies for constructing gene regulatory networks.
  • It emphasizes the role of transcription factors in controlling gene expression patterns.
  • The described methods are adaptable for broader biological research.

Conclusions:

  • Delineating gene regulatory networks is essential for understanding development and cellular function.
  • Yeast one-hybrid assays provide a powerful tool for mapping TF-DNA interactions.
  • The discussed methods have wide-ranging applicability in biological research, including human studies.