Abstract
This chapter provides a detailed description of a method used to study temporal changes in the endoplasmic reticulum (ER) proteome of fibroblast cells exposed to ER stress agents (tunicamycin and thapsigargin). Differential stable isotope labeling by amino acids in cell culture (SILAC) is used in combination with crude ER fractionation, SDS–PAGE and LC-MS/MS to define altered protein expression in tunicamycin or thapsigargin treated cells versus untreated cells. Treated and untreated cells are harvested at different time points, mixed at a 1:1 ratio and processed for ER fractionation. Samples containing labeled and unlabeled proteins are separated by SDS–PAGE, bands are digested with trypsin and the resulting peptides analyzed by LC-MS/MS. Proteins are identified using Bioworks software and the Swiss-Prot database, whereas ratios of protein expression between treated and untreated cells are quantified using ZoomQuant software. Data visualization is facilitated by GeneSpring software.
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Formolo, C.A. et al. (2011). Time Series Proteome Profiling. In: Wu, C., Chen, C. (eds) Bioinformatics for Comparative Proteomics. Methods in Molecular Biology, vol 694. Humana Press. https://doi.org/10.1007/978-1-60761-977-2_22
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DOI: https://doi.org/10.1007/978-1-60761-977-2_22
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