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[Progress on cis-acting regulatory elements in nonsense-mediated mRNA decay]

Zhi Huang1, Tian-Hong Zhou, Bao-Jiang Guo

  • 1College of Life Science and Technology, Jinan University, Guangzhou 510632, China.

Yi Chuan Xue Bao = Acta Genetica Sinica
|January 18, 2005
PubMed

Insights

Nonsense-mediated mRNA decay (NMD) removes faulty mRNAs with premature stop codons. This review details cis-acting elements like exon-exon junctions that regulate NMD, crucial for cellular protection.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Context:

  • Nonsense-mediated mRNA decay (NMD) is a critical cellular surveillance pathway in eukaryotes.
  • NMD prevents the accumulation of aberrant mRNAs containing premature termination codons (PTCs).
  • Failure of NMD can lead to the production of truncated proteins with potentially harmful effects.

Purpose:

  • To review the progress on understanding cis-acting regulatory elements involved in NMD.
  • To consolidate knowledge on how specific sequence elements influence NMD efficiency.
  • To provide a comprehensive overview of regulatory factors impacting mRNA surveillance.

Summary:

  • This review focuses on cis-acting elements that modulate nonsense-mediated mRNA decay (NMD).
  • Key elements discussed include PTC presence, downstream sequence elements (DSEs) in yeast, and exon-exon junctions (EEJs) in mammals.
  • Other regulatory factors such as stabilizer elements (STEs), 3' UTR poly(A) tails, upstream open reading frames (uORFs), and programmed -1 ribosomal frameshifting (-1 PRF) are also examined.

Impact:

  • Enhances understanding of mRNA quality control mechanisms.
  • Provides insights into potential therapeutic targets for diseases associated with NMD dysfunction.
  • Facilitates further research into gene regulation and protein homeostasis.

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