The postsynaptic MAGUK scaffold protein MPP2 organises a distinct interactome that incorporates GABAA receptors at the periphery of excitatory synapses
The postsynaptic MAGUK scaffold protein MPP2 organises a distinct interactome that incorporates GABAA receptors at the periphery of excitatory synapses
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突触后 MAGUK 支架蛋白 MPP2 组织了一个独特的相互作用组,其中包含兴奋性突触周围的 GABAA 受体
DOI:
10.1101/2020.05.29.123034
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Shoichet
中科院分区:
文献类型:
--
作者:
Schmerl;Gimber;Kuropka;Rentsch;Freund;Schmoranzer;Rademacher;Shoichet
Recent advances in imaging technology have highlighted that scaffold proteins and receptors are arranged in sub-synaptic nanodomains. The synaptic MAGUK scaffold protein MPP2 is a component of AMPA receptor-associated protein complexes and also binds to the synaptic cell adhesion molecule SynCAM1. Using super-resolution imaging, we now show that MPP2 and SynCAM1 are situated at the periphery of the postsynaptic density. In order to explore MPP2-associated protein complexes, we used a quantitative comparative mass spectrometry approach and identified multiple GABAAreceptor subunits among the novel synaptic MPP2 interactors. We further show that GABAAreceptors are found together with MPP2 in a subset of dendritic spines and thus highlight MPP2 as a scaffold molecule capable of acting as an adaptor molecule that links peripheral synaptic elements critical for inhibitory regulation to central structures at the PSD of glutamatergic synapses.
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