Analysis of proteins in supernatant and precipitate fractions of human bronchial smooth muscle cells by 1D SDS-PAGE and quantitative LC-MS/MS

Supernatant and precipitate protein fractions of human bronchial smooth muscle cells (HBSMC) after sonication and centrifugation were analyzed using 1D SDS-PAGE. The gel lanes were cube-cut into thirty-three 1.1 mm x 1.1 mm x 1 mm (gel thickness) squares and each gel piece was subjected to in-gel digestion and quantitative LC-MS/MS. Totally 2552 proteins were assigned from the lane of supernatant and 2614 protein species from the lane of precipitate. The results are being further analyzed, e.g. 1) for the comparison between the proteins species residing in the two fractions, and 2) for correlation with the nondenaturing 2DE-grid cut-quantitative LC-MS/MS results (Jin, et al. Electrophoresis 2015, 36, 1711-1723, Jin, et al. Electrophoresis 2015, 1991-2001, PRIDE project PXD001471).