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Related Concept Videos

In-vitro Mutagenesis01:16

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
Mutations in Microorganisms01:18

Mutations in Microorganisms

Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
Genetic Screens02:46

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...
In vitro Mutagenesis01:16

In vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Mutations01:39

Mutations

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Updated: Jun 28, 2026

A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing
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A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing

Published on: July 3, 2016

ENU mutagenesis, a way forward to understand gene function.

Abraham Acevedo-Arozena1, Sara Wells, Paul Potter

  • 1MRC Mammalian Genetics Unit, Harwell, Oxfordshire, OX11 0RD, United Kingdom. a.acevedo@har.mrc.ac.uk

Annual Review of Genomics and Human Genetics
|October 25, 2008
PubMed
Summary

Understanding mammalian gene function is key in genetics. This review highlights N-ethyl-N-nitrosourea (ENU) mutagenesis in mice for creating genetic models of human disorders.

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Area of Science:

  • Genetics and Genomics
  • Mammalian Genetics
  • Model Organism Research

Background:

  • The primary challenge in contemporary genetics is elucidating the function of every gene within mammalian genomes.
  • Mice are a crucial model organism for genetic studies due to their manipulable genomes, enabling gene function analysis and disease modeling.
  • Two primary genetic approaches, reverse genetics (gene-driven) and forward genetics (phenotype-driven), are employed to generate mouse models.

Purpose of the Study:

  • To review advancements in N-ethyl-N-nitrosourea (ENU) mutagenesis screening.
  • To emphasize the application of ENU mutagenesis in generating mouse models for human disorders.

Main Methods:

  • Utilizing N-ethyl-N-nitrosourea (ENU) as a chemical mutagen to induce genetic mutations in mice.
  • Employing both reverse genetics (starting with a known gene) and forward genetics (screening for phenotypes) approaches.
  • Generating genetically modified mice, including knockouts and other mutants, for functional genomics studies.

Main Results:

  • ENU mutagenesis is a versatile tool for both gene-driven and phenotype-driven genetic studies in mice.
  • Significant progress has been made in utilizing ENU screening to create diverse mouse mutants.
  • These mouse models are instrumental in studying gene function and mimicking human disease states.

Conclusions:

  • ENU mutagenesis is highly effective for generating mouse models relevant to human genetic disorders.
  • Continued application of ENU mutagenesis will accelerate the understanding of mammalian gene function.
  • Mouse models generated through ENU screening are vital for translational research in human medicine.