A methodology for discovering novel brain-relevant peptides: Combination of ribosome profiling and peptidomics

Ravi Tharakan, Simion Kreimer, Ceereena Ubaida-Mohien, Joelle Lavoie, Volodimir Olexiouk, Gerben Menschaert, Nicholas T. Ingolia, Robert N. Cole, Koko Ishizuka, Akira Sawa, Leslie G. Nucifora

Research output: Contribution to journalArticle

Abstract

Brain derived peptides function as signaling molecules in the brain and regulate various physiological and behavioral processes. The low abundance and atypical fragmentation of these brain derived peptides makes detection using traditional proteomic methods challenging. In this study, we introduce and validate a new methodology for the discovery of novel peptides derived from mammalian brain. This methodology combines ribosome profiling and mass spectrometry-based peptidomics. Using this framework, we have identified a novel peptide in mouse whole brain whose expression is highest in the basal ganglia, hypothalamus and amygdala. Although its functional role is unknown, it has been previously detected in peripheral tissue as a component of the mRNA decapping complex. Continued discovery and studies of novel regulating peptides in mammalian brain may also provide insight into brain disorders.

Original languageEnglish (US)
Pages (from-to)31-37
Number of pages7
JournalNeuroscience Research
Volume151
DOIs
StatePublished - Feb 2020

Keywords

  • Brain peptides
  • Mass spectrometry
  • Peptidomics
  • Ribosome profiling

ASJC Scopus subject areas

  • Neuroscience(all)

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