The role of serine/threonine phosphatases in human development: Evidence from congenital disorders

Area of Science:

• Molecular Biology
• Genetics
• Developmental Biology

Background:

• Reversible protein phosphorylation is vital for cellular functions, human health, and disease.
• Mutations in serine/threonine protein phosphatases (PSPs) are increasingly linked to human developmental disorders.
• Unlike protein kinases, PSP gene mutations were historically less associated with congenital diseases.

Purpose of the Study:

• To summarize current knowledge on congenital diseases caused by mutations in human PSP genes.
• To identify affected PSP genes and characterize the nature of pathogenic variants (loss-of-function vs. gain-of-function).
• To investigate the predominant brain-specific abnormalities observed in these disorders.

Main Methods:

• Literature review and data summarization of known congenital diseases linked to PSP gene mutations.
• Analysis of inherited and de novo mutations in genes encoding monomeric, catalytic, or regulatory subunits of PSPs.
• Review of studies on disease mechanisms and downstream targets in relevant in vitro and in vivo models.

Main Results:

• Nineteen PSP genes are identified as associated with congenital disorders.
• The majority of pathogenic variants are loss-of-function mutations.
• Most PSP-related congenital disorders exhibit brain-specific abnormalities, despite widespread tissue expression of PSPs.

Conclusions:

• PSPs play a critical role in human brain development and function.
• Understanding the precise pathogenic mechanisms requires further research into downstream targets and effectors.
• Identification of disease mechanisms could pave the way for novel therapeutic strategies.