Combinatorial morphogenesis of dendritic spines and filopodia by SPAR and alpha-actinin2.
Combinatorial morphogenesis of dendritic spines and filopodia by SPAR and alpha-actinin2.
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DOI:
10.1016/j.bbrc.2009.04.069
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发表时间:
2009-06-19
影响因子:
3.1
通讯作者:
Pak, Daniel T. S.
中科院分区:
文献类型:
--
作者:
Hoe, Hyang-Sook;Lee, Ji-Yun;Pak, Daniel T. S.
Rap small GTPases regulate excitatory synaptic strength and morphological plasticity of dendritic spines. Changes in spine structure are mediated by the F-actin cytoskeleton, but the link between Rap activity and actin dynamics is unclear. Here we report a novel interaction between SPAR, a postsynaptic inhibitor of Rap, and α-actinin, a family of actin-crosslinking proteins. SPAR and α-actinin engage in bidirectional structural plasticity of dendritic spines: SPAR promotes spine head enlargement, whereas increased α-actinin2 expression favors dendritic spine elongation and thinning. Surprisingly, SPAR and α-actinin2 can function in an additive rather than antagonistic fashion at the same dendritic spine, generating combination spine/filopodia hybrids. These data identify a molecular pathway bridging the actin cytoskeleton and Rap at synapses, and suggest that formation of spines and filopodia are not necessarily opposing forms of structural plasticity.
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影响因子:
4.8
作者:
Cabello, Nuria;Remelli, Rosaria;Ciruela, Francisco
通讯作者:
Ciruela, Francisco
影响因子:
16.2
作者:
Naisbitt, S;Kim, E;Sheng, M
通讯作者:
Sheng, M
DOI:
10.1074/jbc.m802475200
发表时间:
2008-10-24
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Ang XL;Seeburg DP;Sheng M;Harper JW
通讯作者:
Harper JW
影响因子:
64.8
作者:
KIM, E;NIETHAMMER, M;SHENG, M
通讯作者:
SHENG, M
影响因子:
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作者:
Otey, CA;Carpen, O
通讯作者:
Carpen, O