Cdk5 Promotes Synaptogenesis by Regulating the Subcellular Distribution of the MAGUK Family Member CASK

Overview

Journal Neuron

Publisher Cell Press

Specialty Neurology

Date 2007 Dec 7

PMID 18054859

Citations 59

Authors

Benjamin Adam Samuels

Yi-Ping Hsueh

Tianzhi Shu

Haoya Liang

Huang-Chun Tseng

Chen-Jei Hong

Susan C Su

Janet Volker

Rachael L Neve

David T Yue

Li-Huei Tsai

Affiliations

Soon will be listed here.

Abstract

Synaptogenesis is a highly regulated process that underlies formation of neural circuitry. Considerable work has demonstrated the capability of some adhesion molecules, such as SynCAM and Neurexins/Neuroligins, to induce synapse formation in vitro. Furthermore, Cdk5 gain of function results in an increased number of synapses in vivo. To gain a better understanding of how Cdk5 might promote synaptogenesis, we investigated potential crosstalk between Cdk5 and the cascade of events mediated by synapse-inducing proteins. One protein recruited to developing terminals by SynCAM and Neurexins/Neuroligins is the MAGUK family member CASK. We found that Cdk5 phosphorylates and regulates CASK distribution to membranes. In the absence of Cdk5-dependent phosphorylation, CASK is not recruited to developing synapses and thus fails to interact with essential presynaptic components. Functional consequences include alterations in calcium influx. Mechanistically, Cdk5 regulates the interaction between CASK and liprin-alpha. These results provide a molecular explanation of how Cdk5 can promote synaptogenesis.

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