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Related Experiment Videos

A novel strategy for quantitative proteomics using isotope-coded protein labels.

Alexander Schmidt1, Josef Kellermann, Friedrich Lottspeich

  • 1Max-Planck-Institute of Biochemistry, 82152 Martinsried, Germany. aschmidt@biochem.mpg.de

Proteomics
|December 17, 2004
PubMed
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A new method called isotope-coded protein label (ICPL) enables high-throughput, large-scale protein quantification. This stable isotope tagging technique offers accurate and reproducible results for complex biological samples.

Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Stable isotope labeling coupled with mass spectrometry is vital for identifying and quantifying proteins in complex mixtures.
  • Existing methods face limitations in throughput and applicability to diverse sample types.

Purpose of the Study:

  • To introduce and validate a novel high-throughput quantitative proteome profiling method: isotope-coded protein label (ICPL).
  • To demonstrate ICPL's applicability to various protein samples and compatibility with existing separation techniques.

Main Methods:

  • ICPL utilizes stable isotope tagging of free amino groups on intact proteins.
  • The method was evaluated using comparative analysis of differentially spiked proteomes to assess efficiency (accuracy, dynamic range, sensitivity, speed).

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Main Results:

  • ICPL enables high-throughput, global-scale quantitative proteome profiling.
  • The method demonstrated highly accurate and reproducible protein quantification.
  • High sequence coverage was achieved, facilitating the detection of post-translational modifications and protein isoforms.

Conclusions:

  • ICPL is a versatile and efficient technique for quantitative proteomic analysis.
  • Its applicability to diverse samples and compatibility with standard methods make it valuable for proteome studies.