Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Gene transfer agents (GTAs) are virus-like particles produced by some bacteria that facilitate the horizontal transfer of genetic material between cells. Unlike typical viruses, GTAs do not contain genes for self-replication.
5 Must Know Facts For Your Next Test
GTAs are produced by some bacterial species as a means to transfer DNA between cells.
They play a role in horizontal gene transfer, which is critical for genetic diversity and evolution.
GTAs lack the genes necessary for viral replication, distinguishing them from true viruses.
The transferred DNA can include various genes, potentially aiding in adaptation and survival under different environmental conditions.
Research suggests GTAs may have evolutionary significance in shaping microbial genomes over time.
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Related terms
Horizontal Gene Transfer: The movement of genetic material between organisms other than through vertical transmission (from parent to offspring).
Bacteriophage: A type of virus that infects bacteria and can sometimes facilitate horizontal gene transfer.
Microbial Evolution: The study of how microorganisms evolve and adapt over time, often through mechanisms such as mutation and horizontal gene transfer.