What question did this study set out to answer?

To review empirical evidence for GC-biased gene conversion in mammals and examine its structural and functional consequences for genome evolution and human functional genomics.

August 28, 2009Annual Review of Genomics and Human Genetics

Biased Gene Conversion and the Evolution of Mammalian Genomic Landscapes

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Authors

LDLaurent DuretUniversité Claude Bernard Lyon 1 NGNicolas GaltierCentre National de la Recherche Scientifique

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Implication

Narrative review reveals how GC-biased gene conversion reshapes chromosome architecture in mammals, highlighting its role in fixing harmful mutations.

Key Points

To review empirical evidence for GC-biased gene conversion in mammals and examine its structural and functional consequences for genome evolution and human functional genomics.
Synthesized molecular and population-genetic evidence detailing meiotic recombination and double-strand break repair mechanisms in eukaryotes.
Evaluated evolutionary genomics literature analyzing base-composition disparities, isochore formation, and mutation fixation patterns across mammalian genomes.
Gene conversion acts non-reciprocally during double-strand break repair, favoring GC-alleles over AT-alleles and yielding an excess of GC-gametes in AT/GC heterozygotes.
This transmission disparity drives regional GC-content enrichment in highly recombining chromosomal domains, producing characteristic mammalian isochore structures.
Biased gene conversion promotes the fixation of deleterious AT-to-GC mutations against negative selection, elevating the overall genomic mutation load.

Cite This Study

Duret et al. (2009) studied this question.

synapsesocial.com/papers/69835a64a55a3e57bf87ffd5 https://doi.org/10.1146/annurev-genom-082908-150001

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Implication

Narrative review reveals how GC-biased gene conversion reshapes chromosome architecture in mammals, highlighting its role in fixing harmful mutations.

Biased Gene Conversion and the Evolution of Mammalian Genomic Landscapes

Discussion

Member takes

Implication

Key Points

Cite This Study

Biased Gene Conversion and the Evolution of Mammalian Genomic Landscapes

Discussion

Member takes

Implication

Key Points

Cite This Study

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