GKAP orchestrates activity-dependent postsynaptic protein remodeling and homeostatic scaling.
GKAP orchestrates activity-dependent postsynaptic protein remodeling and homeostatic scaling.
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DOI:
10.1038/nn.3259
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发表时间:
2012-12
影响因子:
25
通讯作者:
Lee, Sang H.
中科院分区:
文献类型:
--
作者:
Shin, Seung Min;Zhang, Nanyan;Hansen, Jonathan;Gerges, Nashaat Z.;Pak, Daniel T. S.;Sheng, Morgan;Lee, Sang H.
How does chronic activity modulation lead to global remodeling of proteins at synapses and synaptic scaling? Here we report a role of guanylate-kinase-associated-protein (GKAP; also known as SAPAP), a scaffolding molecule linking NMDA receptor-PSD-95 to Shank-Homer complexes, in these processes. Over-excitation removes GKAP from synapses via ubiquitin-proteasome system, while inactivity induces synaptic accumulation of GKAP in rat hippocampal neurons. The bi-directional changes of synaptic GKAP levels are controlled by specific CaMKII isoforms coupled to different Ca2+ channels. α-CaMKII activated by NMDA receptor phosphorylates Serine-54 of GKAP to induce poly-ubiquitination of GKAP. In contrast, β-CaMKII activation via L-type voltage-dependent calcium channel promotes GKAP recruitment by phosphorylating Serine-340 and Serine-384 residues, which uncouples GKAP from MyoVa motor complex. Remarkably, overexpressing GKAP turnover mutants not only hampers activity-dependent remodeling of PSD-95 and Shank but also blocks bi-directional synaptic scaling. Therefore, activity-dependent turnover of PSD proteins orchestrated by GKAP is critical for homeostatic plasticity.
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影响因子:
34.7
作者:
Lisman, John;Yasuda, Ryohei;Raghavachari, Sridhar
通讯作者:
Raghavachari, Sridhar
DOI:
10.1083/jcb.136.3.669
发表时间:
1997-02-10
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kim E;Naisbitt S;Hsueh YP;Rao A;Rothschild A;Craig AM;Sheng M
通讯作者:
Sheng M
影响因子:
16.2
作者:
Naisbitt, S;Kim, E;Sheng, M
通讯作者:
Sheng, M
DOI:
10.1073/pnas.1018022108
发表时间:
2011-01-11
影响因子:
11.1
作者:
Groth, Rachel D.;Lindskog, Maria;Tsien, Richard W.
通讯作者:
Tsien, Richard W.
影响因子:
21.3
作者:
Guillaud, Laurent;Wong, Richard;Hirokawa, Nobutaka
通讯作者:
Hirokawa, Nobutaka