A novel preparation technique of red (sparkling) wine for protein analysis
| Autor: | Ludwig Niessen, Rudi F. Vogel, Elisabeth I. Vogt, Veronika M. Kupfer |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
lcsh:QH426-470 Short Communication Protein preparation 01 natural sciences Biochemistry Freeze-drying chemistry.chemical_compound Sparkling wine 010608 biotechnology MALDI-TOF MS Phenol Protein precipitation Sample preparation Polyacrylamide gel electrophoresis ComputingMethodologies_COMPUTERGRAPHICS Wine Chromatography Chemistry 010401 analytical chemistry Red wine food and beverages 0104 chemical sciences ddc lcsh:Genetics Matrix-assisted laser desorption/ionization Ammonium acetate SDS-PAGE |
| Zdroj: | EuPA Open Proteomics EuPA Open Proteomics, Vol 11, Iss C, Pp 16-19 (2016) |
| Popis: | Graphical abstract Highlights • A new protocol for preparation of proteins in red (sparkling) wine was developed. • Dialysis, lyophilization, removal of phenolic compounds, protein precipitation. • New protocol enables improved resolution in subsequent analysis. • Applicability of the method for other beverages made of grapes is given. Despite their low concentration, proteins can influence several key enological parameters such as foam stability or haze formation in (sparkling) wine. Most studies focus on white (sparkling) wine since the higher content of phenolic compounds in red wines impairs proteomic research. The aim of the study was the development of a method for the preparation of red (sparkling) wine proteins for proteomic analysis. Three methods of sample preparation were assessed on silver stained SDS-PAGE gels and with MALDI-TOF MS. Our new method was highly suitable for the preparation of proteins for the aforementioned applications. The results showed a substantial increase in signal intensity with a simultaneous decrease in background noise. The preparation protocol consists of (i) dialysis and freeze drying of the sample, (ii) removal of phenolic compounds by water-saturated phenol and (iii) protein precipitation by addition of ammonium acetate. Employment of this method followed by SDS-PAGE analysis allowed for silver stained gels with diminished background or streaking and clearly resolved protein bands. Analysis of spectra obtained from samples prepared according to the proposed protocol showed increased intensity and signal-to-noise ratio in MALDI-TOF MS. Furthermore it was demonstrated that this method can be applied to various kinds of grape products. |
| Databáze: | OpenAIRE |
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