TBK1 phosphorylates STAT6 on Ser407, which in turn activates another unidentified tyrosine kinase to phosphorylate STAT6 on Tyr641. Mutant constructs with Tyr641 replaced by Phe totally abolished STAT6 activity in response to virus or IL-4/IL-13 (Chen H et al. 2011).
Yang, J, Qin, Z, Chen, H, Guan, Y, Zhou, X, Barber, G, Jiang, Z, Sun, H, Ishikawa, H, You, F, Sun, W, Gutman, D, Tang, H, Chen, L, Wang, Y, Gu, J, Xia, W
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