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Alu repeats and human genomic diversity
Mark A Batzer1, Prescott L Deininger
1Department of Biological Sciences, Biological Computation and Visualization Center, Louisiana State University, 202 Life Sciences Building, Baton Rouge, Louisiana 70803, USA. mbatzer@lsu.edu
Nature Reviews. Genetics
|May 4, 2002
Summary
Alu elements have proliferated over one million times in primate genomes over 65 million years, creating diverse subfamilies. These elements are valuable for studying primate evolution and human population genetics due to their genetic markers.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Biology
Background:
- Alu elements are repetitive DNA sequences that have amplified to over a million copies in primate genomes.
- Their propagation over 65 million years has led to the formation of distinct Alu subfamilies.
- Alu elements influence genome structure and function through various mechanisms.
Purpose of the Study:
- To highlight the significance of Alu elements in primate genome evolution.
- To underscore the utility of Alu-insertion polymorphisms in population genetics and comparative genomics.
- To explain the impact of Alu elements on genomic integrity and gene expression.
Main Methods:
- Analysis of Alu element distribution and subfamily age in primate genomes.
- Investigation of the functional consequences of Alu insertions, including mutations and gene expression alterations.
- Characterization of Alu-insertion polymorphisms as genetic markers.
Main Results:
- Alu elements have extensively colonized primate genomes, generating a diverse array of subfamilies.
- Alu elements contribute to genomic instability through insertions, recombination, and gene conversion.
- Alu-insertion polymorphisms serve as reliable markers for tracing evolutionary history and population dynamics.
Conclusions:
- Alu elements are major drivers of primate genome evolution and diversification.
- Alu insertions have profound effects on gene function and regulation.
- Alu-insertion polymorphisms offer powerful tools for genetic research in primates and humans.