Synaptic vesicle proteins under conditions of rest and activation: analysis by 2-D difference gel electrophoresis. Academic Article uri icon

Overview

abstract

  • Synaptic vesicles are organelles of the nerve terminal that secrete neurotransmitters by fusion with the presynaptic plasma membrane. Vesicle fusion is tightly controlled by depolarization of the plasma membrane and a set of proteins that may undergo post-translational modifications such as phosphorylation. In order to identify proteins that undergo modifications as a result of synaptic activation, we induced massive exocytosis and analysed the synaptic vesicle compartment by benzyldimethyl-n-hexadecylammonium chloride (BAC)/SDS-PAGE and difference gel electrophoresis (DIGE) followed by MALDI-TOF-MS. We identified eight proteins that revealed significant changes in abundance following nerve terminal depolarization. Of these, six were increased and two were decreased in abundance. Three of these proteins were phosphorylated as detected by Western blot analysis. In addition, we identified an unknown synaptic vesicle protein whose abundance increased on synaptic activation. Our results demonstrate that depolarization of the presynaptic compartment induces changes in the abundance of synaptic vesicle proteins and post-translational protein modification.

publication date

  • September 1, 2006

Research

keywords

  • Electrophoresis, Gel, Two-Dimensional
  • Nerve Tissue Proteins
  • Synaptic Vesicles

Identity

Scopus Document Identifier

  • 33748929314

Digital Object Identifier (DOI)

  • 10.1002/elps.200500864

PubMed ID

  • 16944461

Additional Document Info

volume

  • 27

issue

  • 17