The Unique Tryptophan Residue of the Vitamin D Receptor Is Critical for Ligand Binding and Transcriptional Activation
The Unique Tryptophan Residue of the Vitamin D Receptor Is Critical for Ligand Binding and Transcriptional Activation
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维生素 D 受体的独特色氨酸残基对于配体结合和转录激活至关重要
DOI:
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发表时间:
2001
影响因子:
6.2
通讯作者:
R. Kremer
中科院分区:
文献类型:
--
作者:
C. Solomon;M. Macoritto;Xiaoling Gao;John H. White;R. Kremer
The human vitamin D receptor (hVDR) is a member of the nuclear receptor superfamily of transcriptional regulators. Here we show that tryptophan 286 of the hVDR is critical for ligand binding and transactivation of 1,25‐dihydroxyvitamin D3 [1,25(OH)2D3] target genes. Two mutants of the hVDR were produced, W286A and W286F, in which the tryptophan was replaced with an alanine or a phenylalanine, respectively. The W286A mutant did not bind 1,25(OH)2D3, interact with steroid receptor coactivator 1 (SRC‐1) in vitro, or activate transcription. Moreover, the W286A receptor did not heterodimerize in a ligand‐dependent manner with the human retinoid X receptor α (hRXRα). Although the W286F receptor heterodimerized with hRXRα, interacted with SRC‐1, and bound 1,25(OH)2D3, its capacity to transactivate was attenuated severely. Thus, tryptophan 286 of hVDR plays an important role in specific 1,25(OH)2D3 ligand interaction and subsequently in hVDR/RXR interaction, SRC‐1 binding, and ligand‐dependent transactivation of 1,25(OH)2D3 target genes. These results identify the first amino acid that is absolutely required for ligand binding in the VDR and further define the structure‐function relationship of 1,25(OH)2D3 interaction with its receptor.
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DOI:
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发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Cheng,L;Norris,AW;Tate,BF;Rosenberger,M;Grippo,JF;Li,E
通讯作者:
Li,E
DOI:
10.1210/mend.10.12.8961271
发表时间:
1996
期刊:
Molecular endocrinology (Baltimore, Md.)
影响因子:
--
作者:
Whitfield,GK;Selznick,SH;Haussler,CA;Hsieh,JC;Galligan,MA;Jurutka,PW;Thompson,PD;Lee,SM;Zerwekh,JE;Haussler,MR
通讯作者:
Haussler,MR
影响因子:
3.5
作者:
HO, SN;HUNT, HD;PEASE, LR
通讯作者:
PEASE, LR
DOI:
10.1006/abbi.1999.9999
发表时间:
1999
期刊:
Archives of biochemistry and biophysics.
影响因子:
--
作者:
Strugnell,SA;Hill,JJ;McCaslin,DR;Wiefling,BA;Royer,CA;DeLuca,HF
通讯作者:
DeLuca,HF