Abstract
PM (plasma membrane) proteins play critical roles in many biological processes and are often used as molecular targets for drug discovery. In PM proteome research, fast and highly selective methods for PM preparation are highly desirable for efficient PM protein identification. In the present study, an improved PM isolation technique involving coating intact cells with synthesized cationic silica-coated magnetic nanospheres was developed and applied to the proteomic analysis of the PM from human erythroleukaemia K562 cells. Western blotting characterization and protein identification of the prepared PM indicated that the PM enrichment method using the prepared magnetic nanospheres is a fast and inexpensive strategy with high specificity. Our results demonstrate the potential of these cationic silica-coated magnetic nanospheres for high-throughput identification of PM proteins from cells.
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