Synapse diversity and synaptome architecture in human genetic disorders

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Over 130 brain diseases stem from genetic mutations impacting excitatory synapse proteins.
• These disorders encompass neurological and psychiatric conditions like autism, schizophrenia, and depression.
• Synapses are complex, with over 1000 proteins forming diverse synapse types crucial for brain function.

Purpose of the Study:

• To investigate the structural organization of synapse diversity across the brain.
• To understand how genetic mutations alter synapse architecture and lead to disease.
• To establish a mechanistic framework for how genetic disorders converge on synapses.

Main Methods:

• Mapping the synaptome across the mouse brain.
• Analyzing the hierarchical expression and assembly of synaptic proteins.
• Correlating changes in synaptome architecture with behavioral phenotypes.

Main Results:

• Synapse diversity is organized into a hierarchical anatomical architecture across the brain.
• This architecture is built by the assembly of proteins into complexes and supercomplexes.
• Mutations in synaptic proteins or their assembly mechanisms alter synaptome architecture and cause behavioral changes.

Conclusions:

• The hierarchical assembly of the synaptome provides a framework for understanding brain disease convergence.
• Genetic mutations affecting synapse protein assembly can explain diverse neurological and psychiatric disorders.
• This research offers insights into the molecular basis of brain diseases linked to synaptic dysfunction.