Quantitative proteomic analysis by accurate mass retention time pairs

被引:489
作者
Silva, JC
Denny, R
Dorschel, CA
Gorenstein, M
Kass, IJ
Li, GZ
McKenna, T
Nold, MJ
Richardson, K
Young, P
Geromanos, S
机构
[1] Waters Corp, Milford, MA 01757 USA
[2] Waters Corp, Beverly, MA 01915 USA
[3] Waters Corp, Manchester M22 5PP, Lancs, England
关键词
D O I
10.1021/ac048455k
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Current methodologies for protein quantitation include 2-dimensional gel electrophoresis techniques, metabolic labeling, and stable isotope labeling methods to name only a few. The current literature illustrates both pros and cons for each of the previously mentioned methodologies. Keeping with the teachings of William of Ockham, "with all things being equal the simplest solution tends to be correct", a simple LC/MS based methodology is presented that allows relative changes in abundance of proteins in highly complex mixtures to be determined. Utilizing a reproducible chromatographic separations system along with the high mass resolution and mass accuracy of an orthogonal time-of-flight mass spectrometer, the quantitative comparison of tens of thousands of ions emanating from identically prepared control and experimental samples can be made. Using this configuration, we can determine the change in relative abundance of a small number of ions between the two conditions solely by accurate mass and retention time. Employing standard operating procedures for both sample preparation and ESI-mass spectrometry, one typically obtains under 5 ppm mass precision and quantitative variations between 10 and 15%. The principal focus of this paper will demonstrate the quantitative aspects of the methodology and continue with a discussion of the associated, complementary qualitative capabilities.
引用
收藏
页码:2187 / 2200
页数:14
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