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Core Genetics & Mechanisms

Homologous Recombination

A precise DNA repair and genetic engineering mechanism that uses a homologous sequence as a template to exchange or replace genetic material. It allows for accurate correction or insertion of DNA sequences at defined genomic loci.

Overview

Homologous recombination (HR) is a precise DNA repair and genetic engineering mechanism that uses a homologous sequence as a template to exchange or replace genetic material. It allows for accurate correction or insertion of DNA sequences at defined genomic loci, preserving reading frames and regulatory integrity.

Frequently Asked Questions

How does homologous recombination differ from NHEJ?

Homologous recombination uses a template sequence for precise repair, while NHEJ directly ligates broken DNA ends without a template, often introducing small insertions or deletions.

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Related Terms

Non-Homologous End Joining (NHEJ)

A DNA double-strand break repair pathway that directly ligates broken DNA ends without requiring a homologous template. It is an efficient but error-prone mechanism that can introduce small insertions or deletions (indels).

Homology-Directed Repair (HDR)

A high-fidelity DNA repair mechanism that uses a homologous DNA sequence as a template to accurately fix double-strand breaks. Unlike NHEJ, HDR ensures precise integration or correction of genetic material.

Targeting Vector (Homology Arms)

A synthetic DNA construct designed to introduce specific genetic modifications into a genome through homologous recombination or HDR. It contains sequences known as homology arms that align precisely with the genomic target locus.

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