Reversed-phase chromatography with multiple fraction concatenation strategy for proteome profiling of human MCF10A cells

• Published in: Proteomics (Weinheim) 2011-05, Vol.11 (10), p.2019-2026
• Main Authors: Wang, Yuexi, Yang, Feng, Gritsenko, Marina A., Wang, Yingchun, Clauss, Therese, Liu, Tao, Shen, Yufeng, Monroe, Matthew E., Lopez-Ferrer, Daniel, Reno, Theresa, Moore, Ronald J., Klemke, Richard L., Camp II, David G., Smith, Richard D.
• Format: Article
• Language: English
• Subjects: 2-D chromatography; Acetonitriles - chemistry; Breast - chemistry; Breast - cytology; Breast - metabolism; Cation exchange; Cell Line; Chromatography; Chromatography, Reverse-Phase - methods; Cluster Analysis; Concatenation; Epithelial Cells - chemistry; Epithelial Cells - cytology; Epithelial Cells - metabolism; Formates - chemistry; Fractionation; Fractions; High pH RP; Humans; Hydrogen-Ion Concentration; Liquid chromatography; Low pH RP; Mass spectrometry; Peptide Fragments - chemistry; Peptide Fragments - isolation & purification; Peptide Fragments - metabolism; Peptide Mapping - methods; Peptides; Proteome - chemistry; Proteome - metabolism; Proteomics - methods; Tandem Mass Spectrometry - methods; Technology; Trypsin - metabolism; Urea - chemistry
• ISSN: 1615-9853; 1615-9861; 1615-9861
• DOI: 10.1002/pmic.201000722

In this study, we evaluated a concatenated low pH (pH 3) and high pH (pH 10) reversed‐phase liquid chromatography strategy as a first dimension for two‐dimensional liquid chromatography tandem mass spectrometry (“shotgun”) proteomic analysis of trypsin‐digested human MCF10A cell sample. Compared with the more traditional strong cation exchange method, the use of concatenated high pH reversed‐phase liquid chromatography as a first‐dimension fractionation strategy resulted in 1.8‐ and 1.6‐fold increases in the number of peptide and protein identifications (with two or more unique peptides), respectively. In addition to broader identifications, advantages of the concatenated high pH fractionation approach include improved protein sequence coverage, simplified sample processing, and reduced sample losses. The results demonstrate that the concatenated high pH reversed‐phased strategy is an attractive alternative to strong cation exchange for two‐dimensional shotgun proteomic analysis.