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A common approach to isolate surface proteins from fungal and bacterial cells is to perform a proteolytic cleavage of proteins on the surface of intact cells suspended in solution. This paper describes miniaturization of this technique, in which cells are adhered on glass surfaces, and all sample treatments are conducted at  μ L volumes. Specifically,  Candida albicans  cells were attached onto HSA-coated glass slides. By depositing the appropriate reagent solutions on the adhered cells, we successfully performed cell washing, treatment with antifugal peptide, Histatin 5, and a proteolysis on intact cells with trypsin. The resulting peptides were subsequently analysed by mass spectrometry. In general, the data obtained was similar to that collected with suspended cells in much larger sample volumes. However, our miniaturized workflow offers the benefit of greatly reducing the consumption of cells and reagents.

international journal of proteomics

Miniaturized Digestion and Extraction of Surface Proteins from<i>Candida albicans</i>following Treatment with Histatin 5 for Mass Spectrometry Analysis

Miniaturized Digestion and Extraction of Surface Proteins fromCandida albicansfollowing Treatment with Histatin 5 for Mass Spectrometry Analysis