Molecular cloning and characterization of additional factors that bind to the interferon-alpha/beta response element B of the murine (2'-5')oligoadenylate synthetase ME-12 gene.

Molecular cloning and characterization of additional factors that bind to the interferon-alpha/beta response element B of the murine (2'-5')oligoadenylate synthetase ME-12 gene.
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与鼠 (2-5) 寡腺苷酸合成酶 ME-12 基因的干扰素-α/β 反应元件 B 结合的其他因子的分子克隆和表征。

DOI:
10.1073/pnas.89.19.8859
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发表时间:
1992
影响因子:
11.1
通讯作者:
Tamm,I
Tamm,I
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yan,C;Tamm,I

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根据干扰素应答元件(interferon response elements,IRE)在聚合酶II转录启动子中的位置,IRE的功能可分为两类:位于核心启动子上游或位于核心启动子内。因此,IRE结合因子(IREBFs)可以作为序列特异性转录因子激活IFN-诱导的基因转录,它们可以参与前起始复合物的形成。在鼠和人(2'-5')寡腺苷酸合成酶基因中,IRE位于核心启动子区域内。由于这个原因,分离编码能与该IRE结合的蛋白质因子的cDNA并确定它们在IFN-诱导型(2 ′-5 ′)寡腺苷酸合成酶基因表达调节中的功能作用是重要的。我们已经分离出三组编码IREBF的cDNA。在这里,我们报告的克隆38 cDNA,其中包含一个开放阅读框编码的蛋白质的277个氨基酸,被指定为IREBF-2。IREBF-2的C末端富含脯氨酸,并且含有高百分比的短臂氨基酸。IREBF-2与疱疹病毒组的一些基因产物有显着相似性。这些基因产物是有效的转录激活剂。IREBF-2在BALB/c 3T3细胞中组成型表达。
The function of interferon (IFN) response elements (IREs) may be classified into two classes according to the location of the IRE in the polymerase II transcription promoter: located upstream of the core promoter, or located within the core promoter. Thus, the IRE-binding factors (IREBFs) can serve as sequence-specific transcription factors that activate IFN-inducible gene transcription and they can participate in preinitiation complex formation. In the murine and human (2'-5')oligoadenylate synthetase genes the IRE is located within the core promoter region. For this reason, it is important to isolate cDNAs encoding protein factors that can bind to this IRE and determine their functional roles in the regulation of expression of the IFN-inducible (2'-5')oligoadenylate synthetase gene. We have isolated three groups of cDNAs that encode IREBFs. Here we report on clone 38 cDNA, which contains an open reading frame encoding a protein of 277 amino acids that is designated IREBF-2. The C terminus of IREBF-2 is extremely proline-rich and contains a high percentage of short-armed amino acids. IREBF-2 shares marked similarity with some gene products of the herpes group of viruses. These gene products are potent transcription activators. IREBF-2 is constitutively expressed in BALB/c 3T3 cells.
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