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<p>The exon junction complex (EJC) begins to assemble on the spliceosome, which deposits EJCs upstream of most exon–exon junctions during pre-messenger RNA (mRNA) splicing. EJCs acquire additional alternative modules that define heterogeneous EJCs during pre-mRNA processing to mRNA in the nucleus and after mRNA export into the cytoplasm. In this Review, we discuss the mechanisms of EJC formation, the many roles of the EJC in pre-mRNA and mRNA regulation and how these roles are influenced by EJC composition.</p>

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Gene regulation through exon junction complex modularity

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Elizabeth T. Abshire,
  • Lynne E. Maquat

摘要

The exon junction complex (EJC) begins to assemble on the spliceosome, which deposits EJCs upstream of most exon–exon junctions during pre-messenger RNA (mRNA) splicing. EJCs acquire additional alternative modules that define heterogeneous EJCs during pre-mRNA processing to mRNA in the nucleus and after mRNA export into the cytoplasm. In this Review, we discuss the mechanisms of EJC formation, the many roles of the EJC in pre-mRNA and mRNA regulation and how these roles are influenced by EJC composition.