A novel mutation in the DLG3 gene encoding the synapse-associated protein 102 (SAP102) causes non-syndromic mental retardation
Zanni, Ginevra × Van Esch, Hilde Bensalem, Anissa Saillour, Yoann Poirier, Karine Castelnau, Laetitia Ropers, Hans Hilger de Brouwer, Arjan P M Laumonnier, Fréderic Fryns, Jean-Pierre Chelly, Jamel #
Oxford University Press
Neurogenetics vol:11 issue:2 pages:251-255
We have identified a novel splice site mutation (IVS6-1G > A) in the disc-large homolog 3 (DLG3) gene, encoding the synapse-associated protein 102 (SAP102) in one out of 300 families with moderate to severe non-syndromic mental retardation. SAP102 is a member of the neuronal membrane-associated guanylate kinase protein subfamily comprising SAP97, postsynaptic density (PSD)95, and PSD93, which interacts with methyl-D: -aspartate receptor and associated protein complexes at the postsynaptic density of excitatory synapses. DLG3 is the first mental retardation gene directly linked to glutamate receptor signalling and trafficking, increasingly recognised as a central mechanism in the regulation of synaptic formation and plasticity in brain and cognitive development.