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.

Noun

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