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Related Concept Videos

Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Peptide Identification Using Tandem Mass Spectrometry01:33

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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics
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Doublet N-Terminal Oriented Proteomics for N-Terminomics and Proteolytic Processing Identification.

Benoit Westermann1, Alvaro Sebastian Vaca Jacome1, Magali Rompais1

  • 1BioOrganic Mass Spectrometry Laboratory (LSMBO), IPHC, CNRS-UdS, UMR 7178, University of Strasbourg, 25, rue Becquerel, 67087, Strasbourg, France.

Methods in Molecular Biology (Clifton, N.J.)
|March 19, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel trimethoxyphenyl phosphonium (TMPP) labeling method for comprehensive N-terminome analysis. The approach efficiently identifies both N-terminal and internal peptides in a single experiment, advancing proteomics research.

Keywords:
N-terminomicsProteogenomicsTMPP derivatizationdN-TOP approach

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Area of Science:

  • Proteomics
  • Molecular Biology
  • Biochemistry

Background:

  • The N-terminome, comprising all N-terminal peptides, is crucial for understanding protein processing and function.
  • Standard proteomics methods often struggle with comprehensive N-terminome characterization.
  • Existing N-terminomics techniques typically focus on N-terminal peptides, excluding internal ones.

Purpose of the Study:

  • To develop a novel labeling strategy for simultaneous identification of N-terminal and internal peptides.
  • To establish an efficient and high-throughput method for N-terminome analysis.
  • To overcome limitations of current N-terminomics approaches.

Main Methods:

  • Development of a trimethoxyphenyl phosphonium (TMPP) labeling approach.
  • Implementation of a double heavy/light TMPP labeling strategy.
  • Integration of an automated data validation workflow for doublet N-terminal oriented proteomics (dN-TOP).

Main Results:

  • The TMPP labeling method enables the characterization of both N-terminal and internal digestion peptides in one experiment.
  • The doublet N-terminal oriented proteomics (dN-TOP) strategy proves efficient for high-throughput N-terminome analysis.
  • This method offers a significant advantage over techniques that exclude internal peptides.

Conclusions:

  • The developed TMPP labeling and dN-TOP strategy provide a powerful tool for comprehensive N-terminome analysis.
  • This approach enhances the understanding of proteolytic processing events.
  • The method is suitable for high-throughput applications in biological research.