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Cell Rep. 2018 Aug 7;24(6):1523-1535. doi: 10.1016/j.celrep.2018.07.006.

Noonan Syndrome-Associated SHP2 Dephosphorylates GluN2B to Regulate NMDA Receptor Function.

Author information

1
Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06520, USA.
2
Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.
3
Department of Pharmacology, Yale University, New Haven, CT 06520, USA.
4
Department of Pharmacology, Yale University, New Haven, CT 06520, USA; Program in Integrative Cell Signaling and Neurobiology of Metabolism, Yale University, New Haven, CT 06520, USA.
5
Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06520, USA; Department of Neurosurgery, Yale University, New Haven, CT 06520, USA; Department of Neuroscience, Yale University, New Haven, CT 06520, USA.
6
Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06520, USA; Department of Pharmacology, Yale University, New Haven, CT 06520, USA.
7
Raymond and Beverly Sackler Laboratory of Genetics and Molecular Medicine, Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, Farmington, CT 06030, USA.
8
Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06520, USA; Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA; Department of Neuroscience, Yale University, New Haven, CT 06520, USA; Program in Cellular Neuroscience, Neurodegeneration and Repair, Yale University, New Haven, CT 06520, USA. Electronic address: anthony.koleske@yale.edu.

Abstract

Hyperactivating mutations in the non-receptor tyrosine phosphatase SHP2 cause Noonan syndrome (NS). NS is associated with cognitive deficits, but how hyperactivation of SHP2 in NS changes neuron function is not well understood. We find that mice bearing an NS-associated SHP2 allele (NS mice) have selectively impaired Schaffer collateral-CA1 NMDA (N-methyl-D-aspartate) receptor (NMDAR)-mediated neurotransmission and that residual NMDAR-mediated currents decay faster in NS mice because of reduced contribution of GluN1:GluN2B diheteromers. Consistent with altered GluN2B function, we identify GluN2B Y1252 as an NS-associated SHP2 substrate both in vitro and in vivo. Mutation of Y1252 does not alter recombinant GluN1:GluN2B receptor kinetics. Instead, phospho-Y1252 binds the actin-regulatory adaptor protein Nck2, and this interaction is required for proper NMDAR function. These results establish SHP2 and Nck2 as NMDAR regulatory proteins and strongly suggest that NMDAR dysfunction contributes to NS cognitive deficits.

KEYWORDS:

GluN2B; NMDA receptor; Noonan syndrome; SHP2; tyrosine phosphorylation

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