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Integrated proteomic analysis of post-translational modifications by serial enrichment

Abstract

We report a mass spectrometry–based method for the integrated analysis of protein expression, phosphorylation, ubiquitination and acetylation by serial enrichments of different post-translational modifications (SEPTM) from the same biological sample. This technology enabled quantitative analysis of nearly 8,000 proteins and more than 20,000 phosphorylation, 15,000 ubiquitination and 3,000 acetylation sites per experiment, generating a holistic view of cellular signal transduction pathways as exemplified by analysis of bortezomib-treated human leukemia cells.

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Figure 1: SEPTM enables deep, quantitative analysis of the PTM-ome of a biological sample.
Figure 2: Comparison of nonserial to serial enrichments for K(GG) and K(Ac) enrichments.

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Acknowledgements

This work was supported in part by the Broad Institute of MIT and Harvard and by the following grants from the US National Institutes of Health: grant U24CA160034 from the National Cancer Institute Clinical Proteomics Tumor Analysis Consortium Initiative (to S.A.C.) and grants HHSN268201000033C and R01HL096738 from the National Heart, Lung, and Blood Institute (to S.A.C.).

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Authors and Affiliations

Authors

Contributions

P.M. and S.A.C. developed the SEPTM strategy and conceived of the study; P.M., J.W.Q. and J.P. performed experiments; P.M., J.W.Q., J.P., N.D.U., K.R.C., D.R.M., M.W.B., M.A.G., J.D.J. and S.A.C. contributed to experimental design and data analysis; and P.M. and S.A.C. wrote the manuscript with input from all authors.

Corresponding authors

Correspondence to Philipp Mertins or Steven A Carr.

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Competing interests

The authors declare no competing financial interests.

Supplementary information

Combined PDF

Supplementary Figures 1–4 and Supplementary Tables 5–7 (PDF 747 kb)

Supplementary Table 1

List of all quantified proteins, pSTY-, K(GG)- and K(Ac)-sites that were quantified in at least two replicates in the high, medium and low coverage experiments. (XLSX 22886 kb)

Supplementary Table 2

List of all quantified peptides observed in the proteome analysis at high, medium and low coverage of one representative replicate (replicate 1). (XLSX 28756 kb)

Supplementary Table 3

List of all quantified peptides observed in the phosphoproteome, ubiquitinome and acetylome analyses at high, medium and low coverage of one representative replicate (replicate 1). (XLSX 22298 kb)

Supplementary Table 4

Ubiquitin- and acetyl-site tables for label-free and SILAC-based comparison of non-serial and serial enrichments. (XLSX 2662 kb)

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Mertins, P., Qiao, J., Patel, J. et al. Integrated proteomic analysis of post-translational modifications by serial enrichment. Nat Methods 10, 634–637 (2013). https://doi.org/10.1038/nmeth.2518

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