PCDH7 interacts with GluN1 and regulates dendritic spine morphology and synaptic function.

Area of Science:

• Neuroscience
• Molecular Biology
• Biochemistry

Background:

• The N-terminal domain (NTD) of the GluN1 subunit is crucial for NMDA receptor assembly and function.
• Identifying proteins that interact with GluN1-NTD is essential for understanding NMDA receptor regulation.
• Protocadherin 7 (PCDH7) is implicated in central nervous system (CNS) disorders, including epilepsy.

Purpose of the Study:

• To identify novel interacting proteins of the GluN1-NTD.
• To investigate the functional role of Protocadherin 7 (PCDH7) in neuronal structure and synaptic function.

Main Methods:

• An unbiased screen of approximately 1,500 transmembrane proteins using purified GluN1-NTD as bait.
• Overexpression and knockdown studies in primary neurons and brain slice cultures.
• Electrophysiological recordings to measure synaptic NMDA receptor currents.

Main Results:

• Protocadherin 7 (PCDH7) was identified as a potential interacting protein of the GluN1-NTD.
• PCDH7 modulates dendritic structure morphology in opposing ways upon overexpression or knockdown.
• PCDH7 overexpression leads to a reduction in synaptic NMDA receptor currents.

Conclusions:

• PCDH7 interacts with the GluN1 subunit and regulates dendritic spine morphology.
• PCDH7 influences synaptic NMDA receptor function.
• PCDH7 may play a role in CNS disorders through its interaction with NMDA receptors.