Abstract
The use of surfactants as additives in conjunction with on-probe whole cell bacterial protein analysis employing MALDI-TOF-MS is described. Nonionic and zwitterionic surfactants were used to enhance the detection of high molecular weight proteins. Three nonionic, N-octyl-B-D-glactopyranoside, N-decyl-B-D-maltopyranoside, and N-dodecyl-B-D-maltoside, and two zwitterionic surfactants, N,N-dimethyldodecylamine-N-oxide and zwittergent 3–12 were evaluated with five different MALDI matrix systems. New peaks in the mass range of 2 to 80 kDa were produced with all of the various combinations of matrix and surfactant from both whole cell gram-positive and gram-negative bacteria. Ferulic acid used in conjunction with a 1. 0 mM solution of N-octyl-B-D-glactopyranoside produced the highest quality spectra with high signal to noise ratios and peaks up to 140 kDa.
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Published online July 14, 2005
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Meetani, M.A., Voorhees, K.J. MALDI mass spectrometry analysis of high molecular weight proteins from whole bacterial cells: Pretreatment of samples with surfactants. J Am Soc Mass Spectrom 16, 1422–1426 (2005). https://doi.org/10.1016/j.jasms.2005.04.004
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DOI: https://doi.org/10.1016/j.jasms.2005.04.004