TiSH--a robust and sensitive global phosphoproteomics strategy employing a combination of TiO2, SIMAC, and HILIC
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TiSH--a robust and sensitive global phosphoproteomics strategy employing a combination of TiO2, SIMAC, and HILIC. / Engholm-Keller, Kasper; Birck, Pernille; Størling, Joachim; Pociot, Flemming; Mandrup-Poulsen, Thomas; Larsen, Martin Rask.
In: International Journal of Proteomics, Vol. 75, No. 18, 22.10.2012, p. 5749-61.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - TiSH--a robust and sensitive global phosphoproteomics strategy employing a combination of TiO2, SIMAC, and HILIC
AU - Engholm-Keller, Kasper
AU - Birck, Pernille
AU - Størling, Joachim
AU - Pociot, Flemming
AU - Mandrup-Poulsen, Thomas
AU - Larsen, Martin Rask
N1 - Copyright © 2012 Elsevier B.V. All rights reserved.
PY - 2012/10/22
Y1 - 2012/10/22
N2 - Large scale quantitative phosphoproteomics depends upon multidimensional strategies for peptide fractionation, phosphopeptide enrichment, and mass spectrometric analysis. Previously, most robust comprehensive large-scale phosphoproteomics strategies have relied on milligram amounts of protein. We have set up a multi-dimensional phosphoproteomics strategy combining a number of well-established enrichment and fraction methods: An initial TiO(2) phosphopeptide pre-enrichment step is followed by post-fractionation using sequential elution from IMAC (SIMAC) to separate multi- and mono-phosphorylated peptides, and hydrophilic interaction liquid chromatography (HILIC) of the mono-phosphorylated peptides (collectively abbreviated "TiSH"). The advantages of the strategy include a high specificity and sample preparation workload reduction due to the TiO(2) pre-enrichment step, as well as low adsorptive losses. We demonstrate the capability of this strategy by quantitative investigation of early interferon-¿ signaling in low quantities of insulinoma cells. We identified ~6600 unique phosphopeptides from 300 µg of peptides/condition (22 unique phosphopeptides/µg) in a duplex dimethyl labeling experiment, with an enrichment specificity>94%. When doing network analysis of putative phosphorylation changes it could be noted that the identified protein interaction network centered upon proteins known to be affected by the interferon-¿ pathway, thereby supporting the utility of this global phosphoproteomics strategy. This strategy thus shows great potential for interrogating signaling networks from low amounts of sample with high sensitivity and specificity.
AB - Large scale quantitative phosphoproteomics depends upon multidimensional strategies for peptide fractionation, phosphopeptide enrichment, and mass spectrometric analysis. Previously, most robust comprehensive large-scale phosphoproteomics strategies have relied on milligram amounts of protein. We have set up a multi-dimensional phosphoproteomics strategy combining a number of well-established enrichment and fraction methods: An initial TiO(2) phosphopeptide pre-enrichment step is followed by post-fractionation using sequential elution from IMAC (SIMAC) to separate multi- and mono-phosphorylated peptides, and hydrophilic interaction liquid chromatography (HILIC) of the mono-phosphorylated peptides (collectively abbreviated "TiSH"). The advantages of the strategy include a high specificity and sample preparation workload reduction due to the TiO(2) pre-enrichment step, as well as low adsorptive losses. We demonstrate the capability of this strategy by quantitative investigation of early interferon-¿ signaling in low quantities of insulinoma cells. We identified ~6600 unique phosphopeptides from 300 µg of peptides/condition (22 unique phosphopeptides/µg) in a duplex dimethyl labeling experiment, with an enrichment specificity>94%. When doing network analysis of putative phosphorylation changes it could be noted that the identified protein interaction network centered upon proteins known to be affected by the interferon-¿ pathway, thereby supporting the utility of this global phosphoproteomics strategy. This strategy thus shows great potential for interrogating signaling networks from low amounts of sample with high sensitivity and specificity.
KW - Animals
KW - Cell Line, Tumor
KW - Chemical Fractionation
KW - Chromatography, Liquid
KW - Insulinoma
KW - Interferon-gamma
KW - Phosphopeptides
KW - Phosphorylation
KW - Proteomics
KW - Rats
KW - Sensitivity and Specificity
KW - Signal Transduction
KW - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
KW - Titanium
U2 - 10.1016/j.jprot.2012.08.007
DO - 10.1016/j.jprot.2012.08.007
M3 - Journal article
C2 - 22906719
VL - 75
SP - 5749
EP - 5761
JO - International Journal of Proteomics
JF - International Journal of Proteomics
SN - 2090-2166
IS - 18
ER -
ID: 45775111