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Oncogene. 2000 May 15;19(21):2628-37.

Serine phosphorylation of STATs.

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Vienna Biocenter, Institute of Microbiology and Genetics, Dr. Bohr-Gasse 9, A-1030 Vienna, Austria.


Tyrosine phosphorylation regulates the dimerization of STATs as an essential prerequisite for the establishment of a classical JAK-STAT signaling path. However, most vertebrate STATs contain a second phosphorylation site within their C-termini. The phosphorylated residue in this case is a serine contained within a P(M)SP motif, and in the majority of situations its mutation to alanine alters transcription factor activity. This review addresses recent advances in understanding the regulation of STAT serine phosphorylation, as well as the kinases and other signal transducers implied in this process. The biochemical and biological consequences of STAT serine phosphorylation are discussed. Oncogene (2000).

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