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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Transactivation by NF-IL6/LAP is enhanced by phosphorylation of its activation domain.

One of the members of the bZIP family of transcriptional activators is NF-IL6/LAP (IL-6 DBP, C/EBP beta, CRP2). NF-IL6/LAP protein is highly expressed in liver nuclei, where it has been implicated as a master regulator of the acute-phase response, induced by interleukin-6 (IL-6) and other inflammatory mediators. Also, NF-IL6/LAP is involved in the activation of the IL-6 promoter in response to IL-1 and bacterial lipopolysaccharide. The control of NF-IL6/LAP expression and activity is complex and poorly understood. Under some conditions the NF-IL6/LAP gene is transcriptionally activated by IL-1 and lipopolysaccharide, whereas in other instances, its binding to cognate DNA sequences is enhanced by cytokines. Additionally, the ability of constitutively expressed NF-IL6/LAP to activate transcription is strongly augmented by IL-6, through an unknown signalling pathway. We now show that stimulation of the protein kinase C pathway increases the phosphorylation of Ser 105 within the activation domain of NF-IL6/LAP, and enhances its transcriptional efficacy.[1]


  1. Transactivation by NF-IL6/LAP is enhanced by phosphorylation of its activation domain. Trautwein, C., Caelles, C., van der Geer, P., Hunter, T., Karin, M., Chojkier, M. Nature (1993) [Pubmed]
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