Time-Resolved NMR Analysis of Proteolytic α-Synuclein Processing in vitro and in cellulo

Antonio Limatola, Cedric Eichmann, Reeba Susan Jacob, Gili Ben-Nissan, Michal Sharon, Andres Binolfi, Philipp Selenko

Research output: Contribution to journalArticlepeer-review

Abstract

Targeted proteolysis of the disordered Parkinson's disease protein alpha-synuclein (αSyn) constitutes an important event under physiological and pathological cell conditions. In this work, site-specific αSyn cleavage by different endopeptidases in vitro and by endogenous proteases in extracts of challenged and unchallenged cells was studied by time-resolved NMR spectroscopy. Specifically, proteolytic processing was monitored under neutral and low pH conditions and in response to Rotenone-induced oxidative stress. Further, time-dependent degradation of electroporation-delivered αSyn in intact SH-SY5Y and A2780 cells was analyzed. Results presented here delineate a general framework for NMR-based proteolysis studies in vitro and in cellulo, and confirm earlier reports pertaining to the exceptional proteolytic stability of αSyn under physiological cell conditions. However, experimental findings also reveal altered protease susceptibilities in selected mammalian cell lines and upon induced cell stress.

Original languageEnglish
Article number1800056
Number of pages13
JournalProteomics
Volume18
Issue number21-22
Early online date27 Sep 2018
DOIs
StatePublished - Nov 2018

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology

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