Protein phosphatase 2A - structure, function and role in neurodevelopmental disorders.

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Neurodevelopmental disorders (NDDs) like intellectual disability, autism, and schizophrenia have significant societal costs and unclear causes.
• Recent large-scale genetic studies link de novo mutations in protein phosphatase 2A (PP2A) holoenzyme subunits to NDDs.
• PP2A, a key Ser/Thr phosphatase, forms diverse holoenzymes crucial for cell division, growth, and differentiation, with known roles in cancer and neurodegeneration.

Purpose of the Study:

• To review recent findings on NDDs associated with mutations in PP2A subunits and related proteins.
• To discuss the potential functional and structural consequences of these mutations on PP2A holoenzymes.
• To explore the implications for the etiology of NDDs.

Main Methods:

• Literature review of recent studies on PP2A mutations and NDDs.
• Analysis of genetic sequencing data identifying mutations in PP2A subunits.
• Discussion of the known structure-function relationships of PP2A holoenzymes.

Main Results:

• Numerous de novo mutations in PP2A subunits have been identified in individuals with NDDs.
• These mutations likely alter PP2A holoenzyme structure, localization, and substrate specificity.
• PP2A's role in fundamental cellular processes suggests its dysfunction can disrupt neurodevelopment.

Conclusions:

• Mutations in PP2A subunits represent a significant genetic factor in the etiology of NDDs.
• Understanding how these mutations impact PP2A function is critical for deciphering NDD pathogenesis.
• Further research into PP2A pathways may reveal novel therapeutic targets for neurodevelopmental conditions.