Abstract
A method based on ICP collision-cell MS detection in capillary HPLC was developed to gain an insight into the purity and identity of selenium-containing proteins separated by 1-D and 2-D electrophoresis. The bands and spots obtained after the separation of water-soluble proteins in selenized yeast were digested with trypsin prior to chromatography. Selenium could be detected down to the subpicogram level. The method, assisted by information obtained by MALDI TOF MS on the 5000 Da cut-off fraction, permitted the purity of bands and spots to be estimated and the efficiency of tryptic digestion and the quantity of selenium present in individual peptides to be evaluated. Owing to the high sensitivity and the lack of matrix suppression effects, the method provided chromatograms with signal-to-noise ratios of 10–1000 in conditions where the common ES Q–TOF MS detection failed.
References
Rayman MP (2004) Br J Nutr 92:557–573
Uden PC, Boakye HT, Kahakachchi C, Tyson JF (2004) J Chromatogr A 1050:85–93
Goenaga Infante HG, Hearn R, Catterick T (2005) Anal Bioanal Chem 382:957–967
McSheehy S, Kelly J, Tessier L, Mester Z (2005) Analyst 130:35–37
Ruiz Encinar J, Sliwka-Kaszynska M, Polatajko A, Vacchina V, Szpunar J (2003) Anal Chim Acta 500:171–183
Ruiz Encinar J, Ouerdane L, Buchmann W, Tortajada J, Lobinski R, Szpunar J (2003) Anal Chem 75:3765–3774
Chassaigne H, Chéry CC, Bordin G, Vanhaecke F, Rodriguez AR (2004) J Anal Atom Spectrom 19:85–95
Schaumlöffel D, Ruiz Encinar J, Lobinski R (2003) Anal Chem 75:6837–6842
Laemmli UK (1970) Nature 227:680–685
O’Farrell PH (1975) J Biol Chem 250:4007–4021
Aebersold RH, Leavitt J, Saavedra RA, Hood LE, Kent SB (1987) Proc Natl Acad Sci USA 84:6970–6974
Lewis JK, Wei J, Siuzdak G (2000) Matrix-assisted laser desorption/ionization mass spectrometry in peptide and protein analysis. In: Meyers RA (ed) Encyclopedia of analytical chemistry. Wiley, Chichester, pp 5880–5894
McCarthy J, Hopwood F, Oxley D, Laver M, Castagna A, Righetti PG, Williams K, Herbert B (2003) J Proteome Res 2:239–242
Acknowledgements
The authors thank Dr. R. Grimaud for his help with GE measurements and Dr. H. Preud’homme and Dr. O. Palacios for their help on the MALDI TOF MS. The financial support of the Aquitaine Region is acknowledged.
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Tastet, L., Schaumlöffel, D., Bouyssiere, B. et al. Capillary HPLC–ICP MS mapping of selenocompounds in spots obtained from the 2-D gel electrophoresis of the water-soluble protein fraction of selenized yeast. Anal Bioanal Chem 385, 948–953 (2006). https://doi.org/10.1007/s00216-006-0482-6
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DOI: https://doi.org/10.1007/s00216-006-0482-6