Proteomic analysis of mammalian basic proteins by liquid-based two-dimensional column chromatography

Proteomics. 2006 Feb;6(4):1143-50. doi: 10.1002/pmic.200500433.

Abstract

To develop a standard method for separating highly basic proteins in mammalian cells, we established a 2-D LC separation system coupled with chromatofocusing/nonporous RP column chromatography (CF/NPRPC) in a ProteomeLab PF2D system. After standardizing conditions for 2-D LC, a 2-D liquid protein map of uninfected macrophage proteins with pH range 8.3-11.3 was constructed, and then compared with a macrophage protein map made after infection with Candida albicans. The results demonstrate that 2-D LC offers both high resolution and reproducibility for separation of highly basic, macrophage proteins. After protein identification using a nano 2-D LC-MS/MS Proteomics Solution System, quantitative determination of the changes in the differentially expressed proteins (e.g., galectin-3) in C. albicans-infected macrophages was also accomplished by measuring the peak area of the chromatogram in 2-D LC. The result from this measurement of galectin-3 expression shows a 3.41-fold decrease in the infected macrophage cells, which was further confirmed by that from the RT-PCR of mRNA of galectin-3. Thus, 2-D LC coupled with CF/NPRPC could be applicable to common analysis of highly basic proteins in a high-throughput manner.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Candida albicans / pathogenicity
  • Chromatography, Liquid*
  • Electrophoresis, Gel, Two-Dimensional*
  • Galectin 3 / genetics
  • Galectin 3 / metabolism
  • Isoelectric Focusing
  • Macrophages / metabolism*
  • Macrophages / microbiology
  • Mice
  • Peptide Mapping
  • Proteome / analysis*
  • Proteomics*
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Reverse Transcriptase Polymerase Chain Reaction
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
  • Tumor Cells, Cultured

Substances

  • Galectin 3
  • Proteome
  • RNA, Messenger