Phosphorylation of neuroligin-2 by PKA regulates its cell surface abundance and synaptic stabilization

Here we reveal that protein kinase A phosphorylation of neuroligin-2 affects inhibitory neurotransmission by modulating synaptic concentrations of the adhesion protein.

The trans-synaptic adhesion molecule neuroligin-2 (NL2) is essential for the development and function of inhibitory synapses. In collaboration with Dr Els Hallf and Professor Josef Kittler (UCL, London, UK) we show that post-translational modification dynamically alters synaptic levels of neuroligin-2 with important consequences for inhibitory neurotransmission.

Phosphorylation of neuroligin-2 at Ser714 causes its synaptic dispersion

Using single particle tracking of quantum dot labelled neuroligin-2, we show that phosphorylation of neuroligin-2 at Ser714 causes its dispersal from inhibitory synapses.

Phosphorylation of neuroligin-2 at Ser714 affects inhibitory signaling

Using whole cell electrophysiology, we show that phosphorylation of neuroligin-2 affects the efficacy of GABAergic neurotransmission.

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EF Halff, S Hannan, J Kwanthongdee, F Lesept, TG Smart & JT Kittler (2022). Phosphorylation of neuroligin-2 by PKA regulates its cell surface abundance and synaptic stabilization. Science Signaling 15 (739), eabg2505