Summary.
The advent of proteomics has provided a tool for the concomitant identification and determination of a large series of proteins using two-dimensional gel electrophoresis with subsequent mass spectrometrical analysis. We tried an approach to analyse the high abundance enzyme proteome of a lymphocytic cell line.
Immortalised lymphocytes were grown in RPMI 1640 in the presence of glutamine, harvested and the 100,000 × g supernatant of the homogenate was applied on two-dimensional gel electrophoresis with subsequent in-gel digestion of protein spots and MALDI-TOF (Matrix-associated laser desorption/ionization mass spectroscopy) analysis of resulting peptides using specific software.
A series of 57 metabolic enzymes were identified including enzymes of carbohydrate, amino acid, purine and intermediary metabolism.
We are presenting a tool for the analysis of metabolic systems including enzyme deficiencies at the protein level with the advantage of unambiguous identification of proteins and thus complementing enzyme activity determinations.
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J. E. Oh and K. Krapfenbauer have been equally contributing to the work.
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Oh, J., Krapfenbauer, K. & Lubec, G. Proteomic basis for the possible use of lymphocytes for metabolic screenings. Amino Acids 27, 141–147 (2004). https://doi.org/10.1007/s00726-004-0127-z
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DOI: https://doi.org/10.1007/s00726-004-0127-z