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Khosravani, H. et al.

The Arg473Cys- neuroligin-1 mutation modulates NMDA mediated synaptic transmission and receptor distribution in hippocampal neurons.

Synapses mediate communication between neurons, thus playing a fundamental role in information processing in the CNS. Neuroligins form a family of heterophilic synaptic cell adhesion molecules, and neuroligin 1 ( NL1) has been shown to be involved in the formation of excitatory synapses and have been suggested to associate indirectly with NMDA receptors by common binding to PSD95. A mutation in neuroligin 3 (Arg451Cys-NL3, human sequence numbering) identified in autistic patients is associated with altered spine density and has reduced binding capacity for its presynaptic partner beta-neurexin. Here, we investigated the role of NL1 and the homologous NL1 mutation Arg473Cys- NL1 (R473C- NL1) in excitatory synaptic transmission and NMDA receptor distribution. We demonstrate that R473C- NL1, when expressed in cultured hippocampal neurons, can induce a dramatic increase in NMDA current amplitude and that this change is accompanied by NMDA receptor clustering in the postsynaptic cell.[1]

References

The Arg473Cys-neuroligin-1 mutation modulates NMDA mediated synaptic transmission and receptor distribution in hippocampal neurons. Khosravani, H., Altier, C., Zamponi, G.W., Colicos, M.A. FEBS Lett. (2005) [Pubmed]

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