z-logo
Premium
Easy amino acid sequencing of sulfonated peptides using post‐source decay on a matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometer equipped with a variable voltage reflector
Author(s) -
Hellman Ulf,
Bhikhabhai Rama
Publication year - 2002
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.805
Subject(s) - chemistry , mass spectrometry , chromatography , peptide , matrix assisted laser desorption/ionization , derivatization , amino acid , fragmentation (computing) , desorption , protein mass spectrometry , sample preparation , peptide sequence , adsorption , analytical chemistry (journal) , electrospray ionization , organic chemistry , biochemistry , computer science , gene , operating system
Tryptic peptides were labeled with sulfonic acid groups at the N‐termini using an improved chemistry. The derivatization was performed in common aqueous buffers on peptides adsorbed onto a ZipTip™ C 18 , thus allowing simultaneous desalting/concentration of the sample. When only Arg‐terminating peptides were considered, the procedure from adsorption onto the ZipTip until analysis by MALDI‐PSD took about 10 min and several samples could be worked on in parallel. The resulting improved post‐source decay (PSD) fragmentation produced spectra containing only y‐ions. PSD amino acid sequencing of underivatized and derivatized synthetic peptides was compared. From the sequence information obtained from derivatized peptides isolated by ion selection from tryptic in‐gel digests, a protein was correctly identified which was difficult to analyze from an unclear peptide mass fingerprint analysis. The method was also applied to the identification and localization of phosphorylated Ser and Tyr residues in native and synthetic peptides. Copyright© 2002 John Wiley & Sons, Ltd.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here