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• W2443095149 abstract "Quantification of protein expression in single cells promises to advance a systems-level understanding of normal development. Using a bottom-up proteomic workflow and multiplexing quantification by tandem mass tags, we recently demonstrated relative quantification between single embryonic cells (blastomeres) in the frog (Xenopus laevis) embryo. In this study, we minimize derivatization steps to enhance analytical sensitivity and use label-free quantification (LFQ) for single Xenopus cells. The technology builds on a custom-designed capillary electrophoresis microflow-electrospray ionization high-resolution mass spectrometry platform and LFQ by MaxLFQ (MaxQuant). By judiciously tailoring performance to peptide separation, ionization, and data-dependent acquisition, we demonstrate an ∼75-amol (∼11 nm) lower limit of detection and quantification for proteins in complex cell digests. The platform enabled the identification of 438 nonredundant protein groups by measuring 16 ng of protein digest, or <0.2% of the total protein contained in a blastomere in the 16-cell embryo. LFQ intensity was validated as a quantitative proxy for protein abundance. Correlation analysis was performed to compare protein quantities between the embryo and n = 3 different single D11 blastomeres, which are fated to develop into the nervous system. A total of 335 nonredundant protein groups were quantified in union between the single D11 cells spanning a 4 log-order concentration range. LFQ and correlation analysis detected expected proteomic differences between the whole embryo and blastomeres, and also found translational differences between individual D11 cells. LFQ on single cells raises exciting possibilities to study gene expression in other cells and models to help better understand cell processes on a systems biology level." @default.
• W2443095149 created "2016-06-24" @default.
• W2443095149 creator A5004250024 @default.
• W2443095149 creator A5005738709 @default.
• W2443095149 creator A5020498665 @default.
• W2443095149 creator A5059556496 @default.
• W2443095149 date "2016-08-01" @default.
• W2443095149 modified "2023-10-12" @default.
• W2443095149 title "Label-free Quantification of Proteins in Single Embryonic Cells with Neural Fate in the Cleavage-Stage Frog (Xenopus laevis) Embryo using Capillary Electrophoresis Electrospray Ionization High-Resolution Mass Spectrometry (CE-ESI-HRMS)" @default.
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• W2443095149 doi "https://doi.org/10.1074/mcp.m115.057760" @default.
• W2443095149 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4974349" @default.
• W2443095149 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27317400" @default.
• W2443095149 hasPublicationYear "2016" @default.
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