Integrating Weak Anion Exchange and Ultraviolet Photodissociation Mass Spectrometry with Strategic Modulation of Peptide Basicity for the Enrichment of Sulfopeptides
| Autor: | Jennifer S. Brodbelt, Michelle R. Robinson |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Tyrosine sulfation chemistry.chemical_classification Chromatography Ion exchange Elution Chemistry Electrospray ionization 010401 analytical chemistry Photodissociation Peptide Mass spectrometry 01 natural sciences 0104 chemical sciences Analytical Chemistry 03 medical and health sciences 030104 developmental biology Sulfation |
| Zdroj: | Analytical Chemistry. 88:11037-11045 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | Tyrosine sulfation is an important post-translational modification but remains difficult to detect in biological samples owing to its low stoichiometric abundance and the lack of effective enrichment methods. In the present study, weak anion exchange (WAX) is evaluated for the enrichment of sulfopeptides that have been modified via carbamylation to convert all primary amines to less basic carbamates. The decrease in basicity enhanced the binding of carbamylated sulfopeptides to WAX resin relative to nonsulfated peptides. Upon elution and electrospray ionization in the negative mode, ultraviolet photodissociation (UVPD) was applied for peptide sequencing. Application of the method to a tryptic digest of bovine coagulation factor V resulted in identification of sulfation on tyrosine 1513. |
| Databáze: | OpenAIRE |
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