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Updated: Sep 19, 2025

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
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Nonsense Mutations in Rare and Ultra-Rare Human Disorders: An Overview.

Emanuele Vitale1, Davide Ricci1, Federica Corrao1

  • 1Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo, Italy.

IUBMB Life
|June 6, 2025
PubMed
Summary
This summary is machine-generated.

Nonsense mutations cause rare diseases by creating faulty proteins. Translational readthrough offers a potential therapeutic strategy to restore protein function in these genetic disorders.

Keywords:
genetic rare diseasesnonsense mutationspremature termination codonstranslational readthrough

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Area of Science:

  • Genetics
  • Molecular Biology
  • Rare Diseases

Background:

  • Over 7000 rare diseases affect 350 million people globally.
  • Nonsense mutations, causing premature stop codons, account for 10% of inherited diseases.
  • These mutations lead to truncated, nonfunctional proteins and loss-of-function phenotypes.

Purpose of the Study:

  • To explore the molecular characteristics of nonsense-related diseases (NRDs).
  • To review the mechanisms of premature termination codon (PTC) formation and their consequences.
  • To discuss translational readthrough as a potential therapeutic approach.

Main Methods:

  • Review of scientific literature on nonsense mutations and NRDs.
  • Analysis of molecular mechanisms including nonsense-mediated mRNA decay (NMD).
  • Examination of translational readthrough processes and influencing factors.

Main Results:

  • Nonsense mutations lead to PTCs via various genetic alterations.
  • PTC mRNAs can be degraded by NMD or evade it, producing truncated proteins.
  • Translational readthrough can potentially restore protein function, depending on context.

Conclusions:

  • NRDs result from premature termination codons and subsequent protein truncation.
  • Understanding NMD and readthrough mechanisms is crucial for therapeutic development.
  • Targeting readthrough offers a promising avenue for treating genetic disorders caused by nonsense mutations.