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Related Concept Videos

Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Proteomics01:33

Proteomics

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 proteomics...

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Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
11:54

Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry

Published on: March 23, 2020

Proteome wide screening using peptide affinity capture.

Oliver Poetz1, Sibylle Hoeppe, Markus F Templin

  • 1NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany. poetz@nmi.de

Proteomics
|March 19, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces Triple X Proteomics Antibodies (TXP) for improved protein analysis using mass spectrometry. TXP antibodies enable efficient peptide enrichment, overcoming bottlenecks in proteomic research and enabling broader biomarker discovery.

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Mass spectrometry (MS)-based strategies are crucial for protein identification in proteomics.
  • Efficient sample fractionation remains a significant challenge in MS-based protein analysis.
  • Current immunoaffinity methods for peptide enrichment are limited in scope and analyte coverage.

Purpose of the Study:

  • To address the limitations of current immunoaffinity approaches in proteomics.
  • To introduce a novel concept for broad proteome analysis using group-specific antibodies.
  • To enable unbiased biomarker discovery through enhanced peptide enrichment.

Main Methods:

  • Development and application of Triple X Proteomics Antibodies (TXP) targeting group-specific peptides.
  • Fractionation of peptides with identical termini via TXP immunoaffinity enrichment.
  • Identification of enriched peptides using established tandem mass spectrometry (MS/MS) procedures.
  • Bioinformatic algorithms to define minimal TXP epitope sets for proteome coverage.

Main Results:

  • TXP antibodies facilitate the enrichment of specific peptide classes based on shared termini.
  • This approach overcomes the limitations of small-scale analyte quantification in single experiments.
  • Bioinformatic analysis allows for the design of minimal antibody sets for broad proteome coverage.
  • Potential for a universal toolbox of TXP antibodies for general immunoaffinity applications.

Conclusions:

  • TXP immunoaffinity enrichment represents a significant advancement in MS-based proteomics.
  • This method enables more comprehensive and less biased proteome analysis.
  • The development of a universal TXP antibody toolbox promises to revolutionize biomarker discovery and protein quantification.