insertional mutagenesis

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insertional mutagenesis

Scientists use insertional mutagenesis to disrupt a specific gene by placing a new DNA sequence into the middle of its strand.

Definition

Noun: 1. A mutation caused by the insertion of exogenous DNA into a genome: In genetics, this term refers to a specific type of mutation that occurs when foreign DNA is integrated into an organism's genetic sequence. This insertion can disrupt a gene's normal function, leading to a change in the organism's traits. It is a fundamental concept for understanding genetic engineering, viral infections, and certain genetic disorders.

Usage Examples
  • Noun:
    • Researchers used insertional mutagenesis to identify genes essential for cell division.
    • The study of retroviruses helped scientists understand the mechanism of insertional mutagenesis.
    • A concern with some gene therapies is the risk of insertional mutagenesis potentially leading to cancer.
Advanced Usage
  • As a research tool: Insertional mutagenesis is often used intentionally in laboratory settings to discover gene functions. By inserting a known DNA sequence (like a transposon or viral vector) into a genome, scientists can disrupt specific genes and observe the resulting effects on the organism.
    • The team employed insertional mutagenesis to create a library of mutant bacteria for their screening assay.
Variants and Related Words
  • Insertional (adjective): Relating to or caused by an insertion.
    • The insertional event was confirmed by DNA sequencing.
  • Mutagenesis (noun): The process of generating a genetic mutation.
  • Insertion (noun): The act of putting something into something else; in genetics, the addition of one or more nucleotide base pairs into a DNA sequence.
Synonyms
  • DNA insertion mutation: A more descriptive synonym that explicitly names the causative agent.
  • Integration mutagenesis: Highlights the integration of foreign DNA into the host genome.
Related Phrases and Concepts
  • Loss-of-function mutation: A common result of insertional mutagenesis, where the inserted DNA disrupts a gene so it no longer works.
  • Gene knockout: A technique that often uses insertional mutagenesis to completely disable a specific gene.
  • Transposon mutagenesis: A specific type of insertional mutagenesis that uses transposable elements (jumping genes) as the inserting agent.
insertional mutagenesis

Scientists use insertional mutagenesis to disrupt a specific gene by placing a new DNA sequence into the middle of its strand.

Noun
  1. (genetics) a mutation caused by the insertion of exogenous DNA into a genome