Abstract
AMPA receptor (AMPAR) trafficking is crucial for synaptic plasticity that may be important for learning and memory. NSF and PICK1 bind the AMPAR GluR2 subunit and are involved in trafficking of AMPARs. Here, we show that GluR2, PICK1, NSF, and alpha-/beta-SNAPs form a complex in the presence of ATPgammaS. Similar to SNARE complex disassembly, NSF ATPase activity disrupts PICK1-GluR2 interactions in this complex. Alpha- and beta-SNAP have differential effects on this reaction. SNAP overexpression in hippocampal neurons leads to corresponding changes in AMPAR trafficking by acting on GluR2-PICK1 complexes. This demonstrates that the previously reported synaptic stabilization of AMPARs by NSF involves disruption of GluR2-PICK1 interactions. Furthermore, we are reporting a non-SNARE substrate for NSF disassembly activity.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adenosine Triphosphatases / metabolism*
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Amino Acid Sequence
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Animals
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Carrier Proteins / biosynthesis
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Carrier Proteins / genetics
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Carrier Proteins / metabolism*
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Carrier Proteins / physiology*
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Cells, Cultured
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Cytoskeletal Proteins
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Embryo, Mammalian
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Hippocampus / cytology
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Hippocampus / metabolism
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Membrane Proteins / biosynthesis
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Membrane Proteins / genetics
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Membrane Proteins / metabolism*
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Molecular Sequence Data
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Mutation / genetics
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N-Ethylmaleimide-Sensitive Proteins
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Neurons / cytology
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Neurons / enzymology
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Neurons / metabolism
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Nuclear Proteins / metabolism*
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Protein Transport / physiology
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Rats
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Rats, Sprague-Dawley
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Receptors, AMPA / biosynthesis
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Receptors, AMPA / metabolism*
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Soluble N-Ethylmaleimide-Sensitive Factor Attachment Proteins
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Vesicular Transport Proteins*
Substances
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Carrier Proteins
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Cytoskeletal Proteins
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Membrane Proteins
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Nuclear Proteins
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PICK1 protein, rat
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Receptors, AMPA
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Soluble N-Ethylmaleimide-Sensitive Factor Attachment Proteins
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Vesicular Transport Proteins
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Adenosine Triphosphatases
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N-Ethylmaleimide-Sensitive Proteins
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Nsf protein, mouse
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Nsf protein, rat