Abstract:
:Interaction with the multi-PDZ protein GRIP is required for the synaptic targeting of AMPA receptors, but the underlying mechanism is unknown. We show that GRIP binds to the liprin-alpha/SYD2 family of proteins that interact with LAR receptor protein tyrosine phosphatases (LAR-RPTPs) and that are implicated in presynaptic development. In neurons, liprin-alpha and LAR-RPTP are enriched at synapses and coimmunoprecipitate with GRIP and AMPA receptors. Dominant-negative constructs that interfere with the GRIP-liprin interaction disrupt the surface expression and dendritic clustering of AMPA receptors in cultured neurons. Thus, by mediating the targeting of liprin/GRIP-associated proteins, liprin-alpha is important for postsynaptic as well as presynaptic maturation.
journal_name
Neuronjournal_title
Neuronauthors
Wyszynski M,Kim E,Dunah AW,Passafaro M,Valtschanoff JG,Serra-Pagès C,Streuli M,Weinberg RJ,Sheng Mdoi
10.1016/s0896-6273(02)00640-2subject
Has Abstractpub_date
2002-03-28 00:00:00pages
39-52issue
1eissn
0896-6273issn
1097-4199pii
S0896627302006402journal_volume
34pub_type
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