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Dissecting the iTRAQ Data Analysis.

Suruchi Aggarwal1, Amit Kumar Yadav2

  • 1Immunology Group, International Centre for Genetic Engineering and Biotechnology, ICGEB Campus, Aruna Asaf Ali Marg, New Delhi, 110067, India.

Methods in Molecular Biology (Clifton, N.J.)
|November 1, 2015
PubMed
Summary
This summary is machine-generated.

Isobaric tags for relative and absolute quantitation (iTRAQ) enables multiplexing samples for mass spectrometry proteomics. This technique enhances peptide signals for accurate relative and absolute protein quantitation in biological studies.

Keywords:
Chemical labelingQuantitative proteomicsRelative protein quantitationStatisticsiTRAQ

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Area of Science:

  • Proteomics
  • Quantitative Biology
  • Biochemistry

Background:

  • Mass spectrometry-based quantitative proteomics is crucial for understanding biological systems.
  • Chemical tagging methods, including isobaric tags for relative and absolute quantitation (iTRAQ), are vital for various study designs.
  • iTRAQ allows multiplexing of samples for efficient proteomic analysis.

Purpose of the Study:

  • To highlight the utility of iTRAQ in quantitative proteomics.
  • To explain the principles of iTRAQ for relative and absolute quantitation.
  • To underscore the importance of iTRAQ in biological research.

Main Methods:

  • Utilizes isobaric tags for relative and absolute quantitation (iTRAQ) chemical labeling.
  • Employs multiplexing of up to eight samples in a single mass spectrometry run.
  • Quantitation is performed during MS/MS analysis via reporter ion masses.

Main Results:

  • iTRAQ facilitates the equalization of peptide masses, leading to combined elution peaks.
  • Enhanced peptide signals improve the accuracy of quantitation.
  • Relative quantitation is achieved through reporter ion masses, with absolute quantitation possible using spiked-in proteins.

Conclusions:

  • iTRAQ is a powerful technique for multiplexed quantitative proteomics.
  • The method enhances peptide signal and enables both relative and absolute protein quantitation.
  • iTRAQ significantly contributes to molecular-level insights in biological systems.