Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor

Raj Kumar, Ilia V. Baskakov, Ganesan Srinivasan, David W. Bolen, James Lee, E. Brad Thompson

Research output: Contribution to journalArticle

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Abstract

Studies of individual domains or subdomains of the proteins making up the nuclear receptor family have stressed their modular nature. Nevertheless, these receptors function as complete proteins. Studies of specific mutations suggest that in the holoreceptors, intramolecular domain-domain interactions are important for complete function, but there is little knowledge concerning these interactions. The important transcriptional transactivation function in the N-terminal part of the glucocorticoid receptor (GR) appears to have little inherent structure. To study its interactions with the DNA binding domain (DBD) of the GR, we have expressed the complete sequence from the N- terminal through the DBD of the human GR. Circular dichroism analyses of this highly purified, multidomain protein show that it has a considerable helical content. We hypothesized that binding of its DBD to the cognate glucocorticoid response element would confer additional structure upon the N- terminal domain. Circular dichroism and fluorescence emission studies suggest that additional helicity as well as tertiary structure occur in the two- domain protein upon DNA binding. In sum, our data suggest that interdomain interactions consequent to DNA binding imparts structure to the portion of the GR that contains a major transactivation domain.

Original languageEnglish (US)
Pages (from-to)24737-24741
Number of pages5
JournalJournal of Biological Chemistry
Volume274
Issue number35
DOIs
StatePublished - Aug 27 1999

Fingerprint

Glucocorticoid Receptors
DNA
Circular Dichroism
Transcriptional Activation
Proteins
DNA-Binding Proteins
Response Elements
Cytoplasmic and Nuclear Receptors
Nuclear Family
Glucocorticoids
Fluorescence
Mutation

ASJC Scopus subject areas

  • Biochemistry

Cite this

Kumar, R., Baskakov, I. V., Srinivasan, G., Bolen, D. W., Lee, J., & Thompson, E. B. (1999). Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor. Journal of Biological Chemistry, 274(35), 24737-24741. https://doi.org/10.1074/jbc.274.35.24737

Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor. / Kumar, Raj; Baskakov, Ilia V.; Srinivasan, Ganesan; Bolen, David W.; Lee, James; Thompson, E. Brad.

In: Journal of Biological Chemistry, Vol. 274, No. 35, 27.08.1999, p. 24737-24741.

Research output: Contribution to journalArticle

Kumar, R, Baskakov, IV, Srinivasan, G, Bolen, DW, Lee, J & Thompson, EB 1999, 'Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor', Journal of Biological Chemistry, vol. 274, no. 35, pp. 24737-24741. https://doi.org/10.1074/jbc.274.35.24737
Kumar R, Baskakov IV, Srinivasan G, Bolen DW, Lee J, Thompson EB. Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor. Journal of Biological Chemistry. 1999 Aug 27;274(35):24737-24741. https://doi.org/10.1074/jbc.274.35.24737
Kumar, Raj ; Baskakov, Ilia V. ; Srinivasan, Ganesan ; Bolen, David W. ; Lee, James ; Thompson, E. Brad. / Interdomain signaling in a two-domain fragment of the human glucocorticoid receptor. In: Journal of Biological Chemistry. 1999 ; Vol. 274, No. 35. pp. 24737-24741.
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