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Related Experiment Videos

How homologous recombination generates a mutable genome.

Matthew Hurles1

  • 1Wellcome Trust Sanger Institute, Genome Campus, Cambridge, CB10 1SA, UK. meh@sanger.ac.uk

Human Genomics
|October 4, 2005
PubMed
Summary

Recombination and mutation are linked evolutionary processes. Allelic recombination influences mutation rates and drives gene family expansion, but can also cause genetic diseases.

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Area of Science:

  • Evolutionary genetics
  • Genomics
  • Molecular biology

Background:

  • Traditionally, mutation and recombination were viewed as independent evolutionary forces.
  • Mutation generates genetic variation, while recombination shuffles existing variation.
  • Emerging evidence suggests a functional link between recombination and mutation rates.

Purpose of the Study:

  • To explore the interplay between recombination and mutation in genome evolution.
  • To investigate how recombination influences mutation rates and structural variation.
  • To understand the role of recombination in gene family expansion and genetic disease.

Main Methods:

  • Analysis of whole-genome sequences.
  • Comparative genomics to identify patterns of genome evolution.
  • Inference of mutation rates in relation to recombination hotspots.

Main Results:

  • High mutation rates are associated with regions of high allelic recombination.
  • Recombination between duplicated sequences leads to structural variation.
  • Expansion of clustered gene families is a significant mode of genome evolution.

Conclusions:

  • Recombination is not merely a shuffler of variation but actively influences mutation.
  • Genomic dynamism driven by recombination contributes to gene family evolution.
  • Recombination-associated genomic rearrangements are implicated in the etiology of genetic diseases.

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