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Cell. 2006 Dec 15;127(6):1265-81.

Quantitative proteomics analysis of the secretory pathway.

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  • 1Department of Anatomy and Cell Biology, McGill University, 3640 University Street, Montreal, Quebec H3A 2B2, Canada.


We report more than 1400 proteins of the secretory-pathway proteome and provide spatial information on the relative presence of each protein in the rough and smooth ER Golgi cisternae and Golgi-derived COPI vesicles. The data support a role for COPI vesicles in recycling and cisternal maturation, showing that Golgi-resident proteins are present at a higher concentration than secretory cargo. Of the 1400 proteins, 345 were identified as previously uncharacterized. Of these, 230 had their subcellular location deduced by proteomics. This study provides a comprehensive catalog of the ER and Golgi proteomes with insight into their identity and function.

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