Abstract
The nuclear proteome enables, manages, and regulates the genome by the collective actions and interactions of proteins found in the nucleus. We applied a proteomic approach to analyze a nuclear proteome during embryonic stem cell (ESC) proliferation, and 3 and 9 days after initiation of differentiation. The nuclei were isolated from cells and their proteins were separated using 2-DE. Out of about 560 protein spots reproducible detected on any give gel, 49 differentially expressed proteins were identified by Matrix Assisted Laser Desorption Ionization-Time of Flight (MALDI TOF/TOF) mass spectrometry. Of them, several nuclear located proteins involved in chromatin remodeling, transcription regulation, apoptosis, cell proliferation, and differentiation were identified including CTBP1, MM-1, RUVBL1, HCC-1, SGTA, SUMO2, and Galectin-1. Functional interaction analysis of differentially expressed proteins revealed that most of nuclear proteins had a direct interaction with c-Myc and p53.
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This study was funded by a grant provided from Royan Institute.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s12015-010-9127-4
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Fig. S1
Morphological and flow cytometry analyses of undifferentiated and differentiated monkey ESCs. a Phase contrast photomicrographs of a colony of monkey ESCs grown on feeder cells. b High magnification of ESCs. Each cell displays a compact morphology and a high nucleus-cytoplasmic ratio containing prominent nucleoli, typical of undifferentiated ESC. c The ESC line had a normal karyotype (42 XY). Representative flow cytometric analysis of key ESC markers, including Oct-4 d, SSEA-4 e, Tra-1-60 f, and Tra-1-81 g. The cells expressing markers compared with isotype control (white peaks) were termed as the marker-positive population. Percentages of double positive for SSEA-4/TRA-1-60 h and SSEA-4/TRA-1-81 i are indicated in the dot plots. The percentages of undifferentiated and differentiated ESCs are presented in l. The differentiating EBs were cultured in suspension for 9 days (Fig. 1 j = day 3, k = day 9) (DOC 188 kb)
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Nasrabadi, D., Larijani, M.R., Fathi, A. et al. Nuclear Proteome Analysis of Monkey Embryonic Stem Cells During Differentiation. Stem Cell Rev and Rep 6, 50–61 (2010). https://doi.org/10.1007/s12015-009-9109-6
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DOI: https://doi.org/10.1007/s12015-009-9109-6