Stimulation of human insulin receptor gene expression by retinoblastoma gene product.
Stimulation of human insulin receptor gene expression by retinoblastoma gene product.
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视网膜母细胞瘤基因产物刺激人胰岛素受体基因表达。
DOI:
10.1074/jbc.270.35.20525
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Tsai,SY
中科院分区:
文献类型:
--
作者:
Shen,WJ;Kim,HS;Tsai,SY
Multiple cis-acting elements have been defined to be important for the transcriptional regulation of the human insulin receptor (hIR) gene expression. We report here that one of these elements also mediated the stimulation of hIR promoter activity by the retinoblastoma gene product (Rb). The cis-element responsible for Rb stimulation was localized to the GA and GC boxes situated between −643 to −607 of the hIR gene. We have previously demonstrated that these GA and GC boxes bind Sp1 with high affinity and are responsible for E1a activation of hIR promoter activity. Mutation of these sequences completely abolished Rb-dependent enhancement of hIR promoter activity. In addition, we localized three regions in the N-terminal domain of Rb to be involved in stimulation of hIR promoter activity. Our results represent one of the first studies to demonstrate a functional importance assigned to the multiple phosphorylation sites in the N terminus of Rb. Finally, the mechanism by which Rb activates the hIR promoter are presented.
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影响因子:
3.2
作者:
R. Freudl;H. Schwarz;M. Degen;U. Henning
通讯作者:
U. Henning
影响因子:
--
作者:
Rajpal, Gautam;Liu, Ming;Arvan, Peter
通讯作者:
Arvan, Peter
DOI:
10.1016/j.ecl.2012.03.002
发表时间:
2012-03-01
影响因子:
4.5
作者:
Borgono, Carla A.;Zinman, Bernard
通讯作者:
Zinman, Bernard
影响因子:
5.8
作者:
BOARI, A;BARRECA, A;VENTUROLI, M
通讯作者:
VENTUROLI, M
影响因子:
56.9
作者:
S. J. Chan;D. Steiner
通讯作者:
D. Steiner