Abstract
Many genes encoding synaptic proteins are associated with neurodevelopmental disorders (NDDs) such as autism spectrum disorders (ASDs), intellectual disability (ID), and epilepsy. Here we review recent studies on the synaptic effects of disease-associated rare variants identified in two families of synaptic proteins: NMDA receptors (NMDARs) and the postsynaptic adhesion molecules neuroligins (NLGNs). Many NMDAR subunit genes (GRINs) are highly intolerant to variation, and both gain-of-function (GOF) and loss-of-function (LOF) variants are implicated in disease. NLGN genes are also associated with ASDs, and in some cases, contribute to the male bias identified in these patients. Understanding the molecular basis of synaptic dysfunction of rare variants in these genes will help the design of new therapeutic approaches.
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