Characterization of the human RB1 promoter and of elements involved in transcriptional regulation.

Characterization of the human RB1 promoter and of elements involved in transcriptional regulation.
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人类 RB1 启动子和参与转录调控的元件的表征。

DOI:
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发表时间:
1994
期刊:
Cell growth & differentiation : the molecular biology journal of the American Association for Cancer Research
影响因子:
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通讯作者:
R. A. Phillips
R. A. Phillips
中科院分区:
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文献类型:
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作者:
R. Gill;P. Hamel;J. Zhe;E. Zacksenhaus;B. Gallie;R. A. Phillips

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视网膜母细胞瘤基因(RB 1)是一种隐性癌基因,与许多人类肿瘤有关。虽然RB 1基因在大多数增殖细胞中表达,但有相当多的证据表明该基因的转录调控。因此,我们对人RB 1基因启动子中的调控元件进行了详细的分析。5'上游区的缺失分析确定基础启动子的位置相对于翻译起始在-208和-179个核苷酸之间。该区域含有转录元件ATF和SP1的必需结合位点,以及E2 F和类固醇激素反应的潜在重要位点,但没有TATA或CAAT盒。引物延伸和RNA酶保护分析鉴定了在启动子下游的-176和-128碱基对处的两个起始位点。共转染实验表明,抑制RB 1启动子由其蛋白产物p110 RB 1。这种抑制已经被映射到核心启动子区含有E2 F结合位点,然而,这个网站是不需要的自动抑制。
The retinoblastoma gene (RB1) is a recessive oncogene implicated in a number of human tumors. Although the RB1 gene is expressed in most proliferating cells, there is considerable evidence for the transcriptional regulation of this gene. Therefore, we have performed a detailed analysis of the regulatory elements in the promoter of the human RB1 gene. Deletion analysis of the 5' upstream region determined the location of the basal promoter to be between -208 and -179 nucleotides relative to the translational start. This region contains essential binding sites for the transcription elements ATF and SP1 and potentially important sites for E2F and steroid hormone responsiveness but no TATA or CAAT boxes. Primer extension and RNase protection analysis identified two initiation sites at -176 and -128 base pairs, both downstream of the promoter. Cotransfection experiments revealed repression of the RB1 promoter by its protein product p110RB1. This repression has been mapped to the core promoter region containing the E2F-binding site; however, this site is not required for autorepression.
人类视网膜母细胞瘤基因的基因组组织。
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影响因子: 8
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发表时间: 1992
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影响因子: --
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