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Cited by 220

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Thyroxine Promotes Association of Mitogen-activated Protein Kinase and Nuclear Thyroid Hormone Receptor (TR) and Causes Serine Phosphorylation of TR

Open access
Davis, Paul J., Shih, Ai, Lin, Hung-Yun, Martino, Leon J., Davis, Faith B.·2000·Journal of Biological Chemistry

Abstract

Activated nongenomically by l-thyroxine (T(4)), mitogen-activated protein kinase (MAPK) complexed in 10-20 min with endogenous nuclear thyroid hormone receptor (TRbeta1 or TR) in nuclear fractions of 293T cells, resulting in serine phosphorylation of TR. Treatment of cells with the MAPK kinase inhibitor, PD 98059, prevented both T(4)-induced nuclear MAPK-TR co-immunoprecipitation and serine phosphorylation of TR. T(4) treatment caused dissociation of TR and SMRT (silencing mediator of retinoid and thyroid hormone receptor), an effect also inhibited by PD 98059 and presumptively a result of association of nuclear MAPK with TR. Transfection into CV-1 cells of TR gene constructs in which one or both zinc fingers in the TR DNA-binding domain were replaced with those from the glucocorticoid receptor localized the site of TR phosphorylation by T(4)-activated MAPK to a serine in the second zinc finger of the TR DNA-binding domain. In an in vitro cell- and hormone-free system, purified activated MAPK phosphorylated recombinant human TRbeta1 (). Thus, T(4) activates MAPK and causes MAPK-mediated serine phosphorylation of TRbeta1 and dissociation of TR and the co-repressor SMRT.

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Metadata

Authors
Davis, P. J., Shih, A., Lin, H.-Y., Martino, L. J., & Davis, F. B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2000-12
Volume
275
Issue
48
Pages
38032-38039
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2006584250
Cited by
220
References
2
FWCI
9.19
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Thyroxine Promotes Association of Mitogen-activated Protein Kinase and Nuclear Thyroid Hormone Receptor (TR) and Causes Serine Phosphorylation of TR. https://app.cochat.ai/papers/10.1074/jbc.m002560200
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Davis, P. J., Shih, A., Lin, H.-Y., Martino, L. J., & Davis, F. B. (2000). Thyroxine Promotes Association of Mitogen-activated Protein Kinase and Nuclear Thyroid Hormone Receptor (TR) and Causes Serine Phosphorylation of TR. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m002560200

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