Abstract
Postsynaptic clustering of GABAA (type A gamma-aminobutyric acid) receptors is essential to ensure proper function of GABAergic synapses. This process is initiated during synapse formation and is maintained throughout life. The tubulin-associated protein gephyrin is required for clustering of GABAA receptors, but its specific role in this process is not understood. A second protein associated selectively with GABAA receptors at postsynaptic sites is dystrophin. It is present in a subset of GABAergic synapses along with several partners, forming the dystrophin-associated protein complex. In this review, we discuss recent advances in the role of neuronal activity and trans-synaptic signaling for the clustering of gephyrin and dystrophin during synaptogenesis and on the role of these proteins for plasticity and maintenance of mature synapses.
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