Hitting two birds with one stone: The unforeseen consequences of nested gene knockouts in Caenorhabditis elegans

  • Jovelin R
  • Cutter A
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Abstract

Nested genes represent an intriguing form of non-random genomic organization in which the boundaries of one gene are fully contained within another, longer host gene. The C. elegans genome contains over 10,000 nested genes, 92% of which are ncRNAs, which occur inside 16% of the protein coding gene complement. Host genes are longer than non-host coding genes, owing to their longer and more numerous introns. Indel alleles are available for nearly all of these host genes that simultaneously alter the nested gene, raising the possibility of nested gene disruption contributing to phenotypes that might be attributed to the host gene. Such dual-knockouts could represent a source of misinterpretation about host gene function. Dual-knockouts might also provide a novel source of synthetic phenotypes that reveal the functional effects of ncRNA genes, whereby the host gene disruption acts as a perturbed genetic background to help unmask ncRNA phenotypes.

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Jovelin, R., & Cutter, A. D. (2016). Hitting two birds with one stone: The unforeseen consequences of nested gene knockouts in Caenorhabditis elegans. Worm, 5(2), e1156835. https://doi.org/10.1080/21624054.2016.1156835

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