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

Physical interaction between hepatitis C virus NS4B protein and CREB-RP/ATF6beta.

By using a yeast two-hybrid assay, cyclic AMP-response-element-binding protein-related protein (CREB-RP), also called activating transcription factor 6beta (ATF6beta), was identified as a cellular protein that interacts with the NS4B protein of hepatitis C virus. An N-terminal half of NS4B and a central portion of CREB-RP/ATF6beta containing the basic leucine zipper (bZIP) domain were involved in the interaction. The interaction between NS4B and CREB-RP/ATF6beta was demonstrated also in mammalian cells by co-immunoprecipitation and confocal microscopic analyses using specific antibodies. The bZIP domain of ATF6alpha, which shares high sequence similarity with CREB-RP/ATF6beta, was also shown to interact with NS4B in yeast although the interaction was weaker than that between NS4B and CREB-RP/ATF6beta. CREB-RP/ATF6beta and ATF6alpha are known as endoplasmic reticulum (ER) stress-induced transcription factors. Collectively, our results imply the possibility that NS4B modulates certain cellular responses upon ER stress through the physical interaction with CREB-RP/ATF6beta and ATF6alpha.[1]


  1. Physical interaction between hepatitis C virus NS4B protein and CREB-RP/ATF6beta. Tong, W.Y., Nagano-Fujii, M., Hidajat, R., Deng, L., Takigawa, Y., Hotta, H. Biochem. Biophys. Res. Commun. (2002) [Pubmed]
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