Temporal Quantitative Proteomics of mGluR-induced Protein Translation and Phosphorylation in Neurons

Charlotte A G H van Gelder, Renske Penning, Tim S Veth, Lisa A E Catsburg, Casper C Hoogenraad, Harold D MacGillavry, Maarten Altelaar

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

At neuronal synapses, activation of group I metabotropic glutamate receptors (mGluR1/5) triggers a form of long-term depression (mGluR-LTD) that relies on new protein synthesis and the internalization of AMPA-type glutamate receptors. Dysregulation of these processes has been implicated in the development of mental disorders such as autism spectrum disorders and therefore merit a better understanding on a molecular level. Here, to study mGluR-induced signaling pathways, we integrated quantitative phosphoproteomics with the analyses of newly synthesized proteins via bio-orthogonal amino acids (azidohomoalanine) in a pulsed labeling strategy in cultured hippocampal neurons stimulated with DHPG, a specific agonist for group I mGluRs. We identified several kinases with important roles in DHPG-induced mGluR activation, which we confirmed using small molecule kinase inhibitors. Furthermore, changes in the AMPA receptor endocytosis pathway in both protein synthesis and protein phosphorylation were identified, whereby Intersectin-1 was validated as a novel player in this pathway. This study revealed several new insights into the molecular pathways downstream of group I mGluR activation in hippocampal neurons, and provides a rich resource for further analyses.

Original languageEnglish
Pages (from-to)1952-1967
Number of pages16
JournalMolecular and Cellular Proteomics
Volume19
Issue number12
DOIs
Publication statusPublished - Dec 2020

Fingerprint

Dive into the research topics of 'Temporal Quantitative Proteomics of mGluR-induced Protein Translation and Phosphorylation in Neurons'. Together they form a unique fingerprint.

Cite this