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Related Experiment Videos

Nanoflow gradient generator coupled with mu-LC-ESI-MS/MS for protein identification.

T Le Bihan1, D Pinto, D Figeys

  • 1Kinetek Pharmaceuticals, Inc., Vancouver, BC, Canada.

Analytical Chemistry
|April 18, 2001
PubMed
Summary

Researchers developed an inexpensive nanoflow gradient generator (etagrad) for reproducible nanoliter per minute solvent gradients. This system enhances protein identification using micro liquid chromatography coupled to electrospray ionization tandem mass spectrometry (microLC-ESI-MS/MS).

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Large-scale protein identification relies on tandem mass spectrometry (MS/MS).
  • Micro liquid chromatography (microLC) coupled to electrospray ionization tandem mass spectrometry (ESI-MS/MS) is crucial for analyzing complex proteomes.
  • Current systems often use expensive HPLC pumps with flow-splitting for nanoliter flow rates, limiting accessibility.

Purpose of the Study:

  • To present an alternative, inexpensive system for generating reproducible nanoliter per minute solvent gradients.
  • To evaluate the performance of this new system for protein identification.

Main Methods:

  • Development of an inexpensive nanoflow gradient generator (etagrad).
  • Integration of etagrad with a microLC-ESI-MS/MS system.

Related Experiment Videos

  • Analysis of standard protein digests and proteomes (yeast, human) with and without isoelectric focusing (IPG) prefractionation.

    • Main Results:

    • The etagrad system reproducibly delivered selected nanoliter per minute gradients.
    • Successful protein identification was demonstrated using the etagrad-microLC-ESI-MS/MS system with standard protein digests.
    • The system showed effectiveness for rapid proteome studies when combined with IPG prefractionation.

    Conclusions:

    • The etagrad offers an affordable and effective solution for nanoliter gradient generation in microLC-ESI-MS/MS.
    • This technology can facilitate large-scale protein identification in complex organisms.
    • The etagrad-microLC-ESI-MS/MS system provides a valuable tool for proteomic research.