The method for the study of protein phoshorylation sites was elaborated. This method is based on the IMAC separation of phosphopeptides from protein proteolytic digests using new magnetic sorbents and on their subsequent identification by mass spectrometry (MS). Magnetic non-porous hydrophilic poly(2-hydroxyethyl methacrylate-co-glycidyl methacrylate) particles prepared by the dispersion polymerization and modified with iminodiacetic acid (IDA) with immobilized Fe(III) and Ga(III) ions were employed for the enrichment of phosphopeptides from the proteolytic digests of two model proteins, porcine pepsin A and bovine α-casein. The optimum conditions for phosphopeptide adsorption and desorption in both cases were investigated and compared. The phosphopeptides separated from both proteolytic digests were analyzed by matrix-assisted laser desorption/ionization time-of-flight MS. For the immunochemical separation of phosphoproteins, protein fraction containing antibodies was obtained from egg yolk of hens immunized with O-phosphoryl-L-serine conjugated to key limpet hemocyanin. Antibodies were purified using affinity chromatography on immobilized α-casein and their presence was proven by MS. Specificity of the obtained antibodies was examined using ELISA tests. Obtained results showed, that specificity...
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:284853 |
| Date | January 2010 |
| Creators | Emmerová, Tereza |
| Contributors | Ryšlavá, Helena, Kučerová, Zdenka |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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