On‐target sample preparation of 4‐sulfophenyl isothiocyanate‐derivatized peptides using AnchorChip Targets
peer-reviewed · Journal of Mass Spectrometry · 2008
| Date | 2008-03-01 |
| Type | peer-reviewed |
| Venue | Journal of Mass Spectrometry |
| Publisher | Wiley |
| Contribution | adjacent |
| DOI | 10.1002/jms.1327 |
| Citations (OpenAlex) | 14 |
| Venue 2-year citedness | 1.85 |
Abstract
De novo sequencing of tryptic peptides by post source decay (PSD) or collision induced dissociation (CID) analysis using MALDI TOF-TOF instruments is due to the easy interpretation facilitated by the introduction of N-terminal sulfonated derivatives. Recently, a stable and cheap reagent, 4-sulfophenyl isothiocyanate (SPITC), has been successfully used for N-terminal derivatization. Previously described methods have always used desalting and concentration by reverse-phase chromatography prior to mass spectrometric analysis. Here we present an on-target sample preparation method based on AnchorChip target technology. The method was optimized for reduction of by-products and sensitivity with SPITC-derivatized tryptic BSA peptides, and successfully applied to protein identification from silver-stained two-dimensional electrophoretic gels of fish liver extracts. The method is simple and sensitive and allowed protein identification based on de novo sequencing and BLAST search from species with limited sequence information.
Methods and tools
- AnchorChip on-target SPITC derivatization: An on-target AnchorChip clean-up for 4-sulfophenyl isothiocyanate derivatized tryptic peptides that replaces reverse-phase desalting before MALDI TOF-TOF de novo sequencing; applied to proteins from fish liver gels.