Reproducible automated phosphopeptide enrichment using magnetic TiO2 and Ti-IMAC.

Reproducible automated phosphopeptide enrichment using magnetic TiO2 and Ti-IMAC.
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DOI:
10.1021/ac5025842
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发表时间:
2014-10-21
影响因子:
7.4
通讯作者:
Jorgensen, Claus
Jorgensen, Claus
中科院分区:
化学1区
文献类型:
--
作者:
Tape, Christopher J.;Worboys, Jonathan D.;Sinclair, John;Gourlay, Robert;Vogt, Janis;McMahon, Kelly M.;Trost, Matthias;Lauffenburger, Douglas A.;Lamont, Douglas J.;Jorgensen, Claus

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Reproducible, comprehensive phosphopeptide enrichment is essential for studying phosphorylation-regulated processes. Here, we describe the application of hyper-porous magnetic TiO2 and Ti-IMAC microspheres for uniform automated phosphopeptide enrichment. Combining magnetic microspheres with a magnetic particle-handling robot enables rapid (45 min), reproducible (r2 ≥ 0.80) and high-fidelity (>90% purity) phosphopeptide purification in a 96-well format. Automated phosphopeptide enrichment demonstrates reproducible synthetic phosphopeptide recovery across 2 orders of magnitude, “well-to-well” quantitative reproducibility indistinguishable to internal SILAC standards, and robust “plate-to-plate” reproducibility across 5 days of independent enrichments. As a result, automated phosphopeptide enrichment enables statistical analysis of label-free phosphoproteomic samples in a high-throughput manner. This technique uses commercially available, off-the-shelf components and can be easily adopted by any laboratory interested in phosphoproteomic analysis. We provide a free downloadable automated phosphopeptide enrichment program to facilitate uniform interlaboratory collaboration and exchange of phosphoproteomic data sets.
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