SUMOylation of the MAGUK protein CASK regulates dendritic spinogenesis.
SUMOylation of the MAGUK protein CASK regulates dendritic spinogenesis.
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DOI:
10.1083/jcb.200712094
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发表时间:
2008-07-14
期刊:
影响因子:
--
通讯作者:
Hsueh YP
中科院分区:
文献类型:
--
作者:
Chao HW;Hong CJ;Huang TN;Lin YL;Hsueh YP
Membrane-associated guanylate kinase (MAGUK) proteins interact with several synaptogenesis-triggering adhesion molecules. However, direct evidence for the involvement of MAGUK proteins in synapse formation is lacking. In this study, we investigate the function of calcium/calmodulin-dependent serine protein kinase (CASK), a MAGUK protein, in dendritic spine formation by RNA interference. Knockdown of CASK in cultured hippocampal neurons reduces spine density and shrinks dendritic spines. Our analysis of the time course of RNA interference and CASK overexpression experiments further suggests that CASK stabilizes or maintains spine morphology. Experiments using only the CASK PDZ domain or a mutant lacking the protein 4.1–binding site indicate an involvement of CASK in linking transmembrane adhesion molecules and the actin cytoskeleton. We also find that CASK is SUMOylated. Conjugation of small ubiquitin-like modifier 1 (SUMO1) to CASK reduces the interaction between CASK and protein 4.1. Overexpression of a CASK–SUMO1 fusion construct, which mimicks CASK SUMOylation, impairs spine formation. Our study suggests that CASK contributes to spinogenesis and that this is controlled by SUMOylation.
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影响因子:
64.8
作者:
Martin, Stephane;Nishimune, Atsushi;Mellor, Jack R.;Henley, Jeremy M.
通讯作者:
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影响因子:
16.2
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DOI:
10.1083/jcb.142.1.139
发表时间:
1998-07-13
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
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影响因子:
56.9
作者:
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通讯作者:
Südhof, TC