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Phosphorylation status determines the opposing functions of Smad2/Smad3 as STAT3 cofactors in T(H)17 differentiation

Title
Phosphorylation status determines the opposing functions of Smad2/Smad3 as STAT3 cofactors in T(H)17 differentiation
Authors
Yoon, Jeong-HwanSudo, KatsukoKuroda, MasahikoKato, MitsuyasuLee, In-KyuHan, Jin SooNakae, SusumuImamura, TakeshiKim, JuryunJu, Ji HyeonKim, Dae-KeeMatsuzaki, KoichiWeinstein, MichaelMatsumoto, IsaoSumida, TakayukiMamura, Mizuko
Ewha Authors
김대기
SCOPUS Author ID
김대기scopus
Issue Date
2015
Journal Title
NATURE COMMUNICATIONS
ISSN
2041-1723JCR Link
Citation
vol. 6
Publisher
NATURE PUBLISHING GROUP
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Transforming growth factor-beta (TGF-beta) and interleukin-6 (IL-6) are the pivotal cytokines to induce IL-17-producing CD4(+) T helper cells (T(H)17); yet their signalling network remains largely unknown. Here we show that the highly homologous TGF-beta receptor-regulated Smads (R-Smads): Smad2 and Smad3 oppositely modify STAT3-induced transcription of IL-17A and retinoic acid receptor-related orphan nuclear receptor, ROR gamma t encoded by Rorc, by acting as a co-activator and co-repressor of STAT3, respectively. Smad2 linker phosphorylated by extracellular signal-regulated kinase (ERK) at the serine 255 residue interacts with STAT3 and p300 to transactivate, whereas carboxy-terminal unphosphorylated Smad3 interacts with STAT3 and protein inhibitor of activated STAT3 (PIAS3) to repress the Rorc and Il17a genes. Our work uncovers carboxy-terminal phosphorylation-independent noncanonical R-Smad-STAT3 signalling network in T(H)17 differentiation.
DOI
10.1038/ncomms8600
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약학대학 > 약학과 > Journal papers
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