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

Cooperation of Stat2 and p300/CBP in signalling induced by interferon-alpha.

The transcription factor ISGF3 transduces interferon (IFN)-alpha signals and activates the transcription of cellular antiviral defence genes. Adenovirus E1A blocks the IFN-alpha response, allowing unhindered viral replication. ISGF3 consists of Stat1, Stat2 and p48. Here we show that p300 and/or CBP (CREB-binding protein), which are transcription adaptors targeted by E1A, interact specifically with Stat2. Binding occurs between the first cysteine-histidine-rich region of p300/CBP and the carboxy-terminal segment of Stat2, a domain essential for ISGF3 function. We find that this domain of Stat2 has transactivation potential, which correlates with its binding to p300/CBP. Moreover, E1A represses Stat2 transactivation and IFN-alpha- activated transcription by inhibiting p300/CBP function. This provides a new mechanism for inhibition of the IFN-alpha-activated antiviral response by E1A, and supports the view that E1A binding to p300/CBP has functional significance for adenovirus replication in its natural host.[1]


  1. Cooperation of Stat2 and p300/CBP in signalling induced by interferon-alpha. Bhattacharya, S., Eckner, R., Grossman, S., Oldread, E., Arany, Z., D'Andrea, A., Livingston, D.M. Nature (1996) [Pubmed]
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