A Novel Cell Fixation Method that Greatly Enhances Protein Identification in Microproteomic Studies Using Laser Capture Microdissection and Mass Spectrometry.
A Novel Cell Fixation Method that Greatly Enhances Protein Identification in Microproteomic Studies Using Laser Capture Microdissection and Mass Spectrometry.
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DOI:
10.1002/pmic.201700294
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发表时间:
2018-06
期刊:
影响因子:
3.4
通讯作者:
Gousset K
中科院分区:
文献类型:
--
作者:
Gordon A;Kannan SK;Gousset K
Microproteomic studies have improved our knowledge of cell biology. Yet, with mass spectrometry (MS) analysis, accuracy can be lost for protein identification and quantification when using heterogeneous samples. Laser capture microdissection (LCM) allows for the enrichment of specific subsets of cells to study their proteome; however, sample fixation is necessary. Unfortunately, fixation hampers MS results due to protein cross-linking. The aim of this study was to identify both a fixation protocol and an extraction method that returns the best yield of proteins for downstream MS analysis, while preserving cellular structures. We compared glutaraldehyde (GLU), a common fixative to preserve cells, to dithiobispropionimidate (DTBP), a cleavable cross-linker. Our DTBP fixation/extraction protocol greatly increased the protein recovery. In fact, while 1000 GLU fixed cells returned only 159 unique protein hits, from 1464 unique peptides of 1994 unique collected spectra, 1000 DTBP fixed cells resulted in 567 unique collected protein hits, from 7542 unique peptides, of 10,401 unique collected spectra. That is, a 3.57-fold increase in protein hits, 5.15-fold increase in unique peptides, and a 5.22-fold increase in unique collected spectra. Overall, the novel protocol introduced here allows for a very efficient protein recovery and good sample quality for MS after sample collection using LCM.
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影响因子:
3.2
作者:
Shi, Shan-Rong;Liu, Cheng;Taylor, Clive R.
通讯作者:
Taylor, Clive R.
DOI:
10.1074/mcp.m111.014050
发表时间:
2012-03
期刊:
Molecular & cellular proteomics : MCP
影响因子:
--
作者:
Geiger T;Wehner A;Schaab C;Cox J;Mann M
通讯作者:
Mann M
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通讯作者:
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影响因子:
4.3
作者:
Brioschi, Maura;Eligini, Sonia;Banfi, Cristina
通讯作者:
Banfi, Cristina
DOI:
10.1007/978-1-4939-0685-7_14
发表时间:
2014-01-01
期刊:
SHOTGUN PROTEOMICS: METHODS AND PROTOCOLS
影响因子:
--
作者:
Arike, Liisa;Peil, Lauri
通讯作者:
Peil, Lauri