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Gewählte Publikation:

Linnemayr, K; Brückner, A; Körner, R; Hahn, R; Jungbauer, A; Josic, D; Roepstorff, P; Rizzi, A; Allmaier, G.
(1999): Matrix-assisted laser desorption/ionization time-of-flight and nano-electrospray ionization ion trap mass spectrometric characterization of 1-cyano-2-substituted-benz[f]isoindole derivatives of peptides for fluorescence detection.
J Mass Spectrom. 1999; 34(4):427-434 FullText FullText_BOKU

A series of hexa- to decapeptides (molecular mass range 800-1200) were labeled with naphthalene-2,3-dicarboxaldehyde, which preferentially reacts with the primary amino groups of a peptide. A highly stable peptide conjugate is formed, which allows selective analysis by fluorescence at excitation and emission wavelengths of 420 and 490 nm, respectively, After removal of unreacted compounds, the peptide conjugates were characterized by matrix-assisted laser desorption/ionization (MALDI) time-of-flight and nano-electrospray ionization (ESI) ion trap mass spectrometry. They readily form both [M + H](+) ions by MALDI and both [M + H](+) and [M + 2H](2+) ions by ESI, Furthermore, the fragmentation behavior of the N-terminally tagged peptides, exhibiting an uncharged N-terminus, was investigated applying post-source decay fragmentation with a curved field reflector and collision-induced dissociation with a quadrupole ion trap. Fragmentation is dominated in both cases by series of a-, b- and y-type ions and [M + H - HCN](+) ions, Peptide bonds adjacent to the fluorescence label were less susceptible to cleavage than the bonds of the non-derivatized peptide ions, In general, the resulting fragment ion patterns were less complex than those of the underivatized peptides, Copyright (C) 1999 John Wiley & Sons, Ltd.
Autor*innen der BOKU Wien:
Hahn Rainer
Jungbauer Alois
Find related publications in this database (using NML MeSH Indexing)
Fluorescent Dyes -
Indoles - chemistry
Mass Spectrometry - methods
Peptides - chemistry

Find related publications in this database (Keywords)
fluorescence detection
matrix-assisted laser desorption ionization
nano-electrospray ionization
ion trap
mass spectrometry
collision-induced dissociation
post-source decay

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