Genetic Disorders and Molecular Mechanisms of Disease

Genetic disorders arise from alterations in the sequence or dosage of genes that disrupt normal cellular functions. These range from single‐gene defects, such as those causing enzyme deficiencies or structural protein abnormalities, to complex polygenic and chromosomal syndromes. At the molecular level, defects often perturb DNA replication and repair, transcriptional and epigenetic control, protein folding and degradation, and intercellular signalling pathways. Advances in structural biology, high‐throughput sequencing and functional genomics have elucidated how specific mutations alter protein conformation, enzyme activity or regulatory networks, leading to disease phenotypes. The global significance of this research is underscored by the development of precision therapies, including genome editing, targeted small molecules and RNA‐based treatments, which aim to correct or compensate for molecular defects. Understanding the interplay between genotype, molecular mechanism and clinical outcome is critical for diagnosis, prognosis and the rational design of novel interventions.

Research from Nature Portfolio

Recent studies have revealed the three‐dimensional architecture and activation mechanism of a serine protease whose missense variants underlie developmental syndromes. High‐resolution crystallography demonstrated that protease function depends on dimer formation, which triggers an allosteric transition to a catalytically competent state. Functional assays showed that dimerisation is essential for processing protein obstacles at the DNA replication fork but not for autoproteolysis. These insights clarify how specific pathogenic mutations enhance or impair protease activity, leading to replication stress and developmental abnormalities, and provide a framework for the design of modulators that restore normal function.

Genetic Disorders and Molecular Mechanisms of Disease publication trend

The graph below shows the total number of articles in genetic disorders and molecular mechanisms of disease across all publications each year (not limited to Nature Index journals).

Technical terms

Dimerization: The process by which two protein monomers associate to form a functional complex.

Replication fork: The Y‐shaped structure where parental DNA strands separate and new strands are synthesised during DNA replication.

Serine protease: An enzyme that uses an active‐site serine residue to cleave peptide bonds in substrate proteins.

Missense mutation: A single nucleotide change in DNA that results in the substitution of one amino acid for another in the encoded protein.

Angiogenesis: The formation of new blood vessels from pre‐existing vasculature, critical for tissue growth and repair.

MYC signalling axis: A transcriptional network centred on the MYC oncoprotein that regulates genes involved in cell growth, proliferation and metabolism.

References

1. Dimerization-dependent serine protease activity of FAM111A prevents replication fork stalling at topoisomerase 1 cleavage complexes. Nature Communications (2024).
2. Dysfunction of Calcyphosine-Like gene impairs retinal angiogenesis through the MYC axis and is associated with familial exudative vitreoretinopathy. eLife (2024).
3. Unravelling the Intricate Roles of FAM111A and FAM111B: From Protease-Mediated Cellular Processes to Disease Implications. International Journal of Molecular Sciences (2024).