Phosphoproteomics Profiling Suggests a Role for Nuclear beta IPKC in Transcription Processes of Undifferentiated Murine Embryonic Stem Cells
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
Protein kinase C (PKC) plays a key role in embryonic stem cell (ESC) proliferation, self-renewal and differentiation However, the function of specific PKC Isoenzymes have yet to be determined Of the PKCs expressed in undifferentiated ESCs, beta IPKC was the only isoenzyme abundantly expressed in the nuclei To investigate the role of beta IPKC in these cells, we employed a phosphoproteomics strategy and used two classical (cPKC) peptide modulators and one beta IPKC-specific inhibitor peptide We identified 13 nuclear proteins that are direct or indirect beta IPKC substrates in undifferentiated ESCs These proteins are known to be involved in regulating transcription, splicing, and chromatin remodeling during proliferation and differentiation Inhibiting beta IPKC had no effect on DNA synthesis in undifferentiated ESCs However, upon differentiation many cells seized to express beta IPKC and beta IPKC was frequently found in the cytoplasm Taken together, our results suggest that beta IPKC takes part in the processes that maintain ESCs in their undifferentiated state FAPESP[2006/52062 6] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) FAPESP[2005/54188-4] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPQ[479673/2007-1] Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) FAPERJ FIOCRUZ Fundação Oswaldo Cruz (Fiocruz) |
Identificador |
JOURNAL OF PROTEOME RESEARCH, v.9, n.12, p.6191-6206, 2010 1535-3893 http://producao.usp.br/handle/BDPI/28661 10.1021/pr100355k |
Idioma(s) |
eng |
Publicador |
AMER CHEMICAL SOC |
Relação |
Journal of Proteome Research |
Direitos |
restrictedAccess Copyright AMER CHEMICAL SOC |
Palavras-Chave | #Protein kinase C #Peptides #Phosphorylation #Proteomics #2DE gels #Differentiation #Embryonic stem cells #PROTEIN-KINASE-C #MESSENGER-RNA #SELF-RENEWAL #LAMIN B1 #RIBONUCLEOPROTEIN K #PROTEOMIC ANALYSIS #MOUSE DEVELOPMENT #HEAT-SHOCK #PKC-BETA #PHOSPHORYLATION #Biochemical Research Methods |
Tipo |
article original article publishedVersion |