A unique mechanism regulating gene expression in 1-cell embryos

  • YAMAMOTO Ryoma
    Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba 277-8562, Japan
  • AOKI Fugaku
    Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba 277-8562, Japan

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  • Opinions and Hypotheses : A unique mechanism regulating gene expression in 1-cell embryos

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<p> After fertilization, the genome of zygotes is transcriptionally silent. The timing of the initiation of transcription is species-specific and occurs at the mid-1-cell stage in mice. Recent analyses using high-throughput sequencing (HTS) have identified thousands of genes transcribed at the 1-cell stage, and the pattern of expression among these genes appears to be unique. In this article, we show the result of an additional analysis using HTS data from a previous study, and present the hypothesis that an extremely loose chromatin structure causes promiscuous gene expression in 1-cell embryos.</p>

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