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Genome-wide deserts for copy number variation in vertebrates

Author

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  • Takashi Makino

    (Graduate School of Life Sciences, Tohoku University)

  • Aoife McLysaght

    (Smurfit Institute of Genetics, University of Dublin, Trinity College)

  • Masakado Kawata

    (Graduate School of Life Sciences, Tohoku University)

Abstract

Most copy number variations are neutral, but some are deleterious and associated with various human diseases. Copy number variations are distributed non-randomly in vertebrate genomes, and it was recently reported that ohnologs, which are duplicated genes derived from whole genome duplication, are refractory to copy number variations. However, it is unclear what genomic factors affect the deleterious effects of copy number variations and the biological significance of the biased genomic distribution of copy number variations remains poorly understood. Here we show that non-ohnologs neighbouring ohnologs are unlikely to have copy number variations, resulting in ohnolog-rich regions in vertebrate genomes being copy number variation deserts. Our results suggest that the genomic location of ohnologs is a determining factor in the retention of copy number variations and that the dosage-balanced ohnologs are likely to cause the deleterious effects of copy number variations in these regions. We propose that investigating copy number variation of genes in regions that are typically copy number variation deserts is an efficient means to find disease-related copy number variations.

Suggested Citation

  • Takashi Makino & Aoife McLysaght & Masakado Kawata, 2013. "Genome-wide deserts for copy number variation in vertebrates," Nature Communications, Nature, vol. 4(1), pages 1-10, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3283
    DOI: 10.1038/ncomms3283
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