Molecular Biology and Evolution 17:1769-1773 (2000)
© 2000 Society for Molecular Biology and Evolution
Letter to the Editor |
Lateral Gene Transfer and Metabolic Adaptation in the Human Parasite Trichomonas vaginalis
*Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada;
Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada;
Genome Sequence Centre, British Columbia Cancer Research Centre, Vancouver, British Columbia, Canada;
and
§Canadian Institute for Advanced Research, Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada
The evolution of a parasitic lifestyle necessitates adaptation to a specialized niche. Examples of common adaptive traits include host interaction systems, metabolic pathways that allow the acquisition of nutrients from the host, and mechanisms to evade host defenses. Such traits could originate by a process of gradual change, but there are mechanisms that would allow potential parasites to adapt very quickly, and one of these mechanisms is lateral gene transfer. Lateral transfer is the process by which genetic information is passed from one genome to an unrelated genome, where it is stably integrated and maintained. There is growing evidence from whole-genome analyses that this process is a very important mechanism in genome evolution, particularly among prokaryotes (Lawrence 1999
). Lateral transfer may be especially important in the evolution of a parasitic lifestyle, as infection-related factors could be transmitted, and many of these factors would presumably confer an immediate selective advantage.
| Acknowledgements |
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| literature cited |
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