Rare genetic diseases associated with G-quadruplex-induced replication stress.

Area of Science:

• Genomics
• Molecular Biology
• Genetics

Background:

• DNA replication stress impedes genome duplication.
• Genomic G-quadruplexes (G4s) are significant barriers to replication fork progression.
• Specialized proteins are required for G4 resolution or bypass.

Purpose of the Study:

• Review rare diseases linked to mutations in G4-resolving and binding proteins.
• Emphasize molecular defects in G4 metabolism causing replication stress and genomic instability.
• Discuss G4 helicase mechanisms and substrate specificity.

Main Methods:

• Literature review of rare diseases associated with G4-metabolizing proteins.
• Analysis of structural data for G4-interactive helicases.
• Discussion of G4 homeostasis dysregulation in disease etiology.

Main Results:

• Mutations in G4-metabolizing proteins lead to hereditary disorders with diverse clinical features.
• These proteins play crucial roles in replication stress response and DNA repair.
• Dysregulated G4 homeostasis contributes to genomic instability and rare disease development.

Conclusions:

• Understanding G4 metabolism is key to rare disease etiology.
• Insights into G4 helicase mechanisms can inform diagnosis and therapeutics.
• Further research is needed to address outstanding questions in G4 homeostasis and disease.