Identification of a 60-kilodalton Rb-binding protein, RBP60, that allows the Rb-E2F complex to bind DNA.

Identification of a 60-kilodalton Rb-binding protein, RBP60, that allows the Rb-E2F complex to bind DNA.
复制标题

鉴定出 60 千道尔顿的 Rb 结合蛋白 RBP60,该蛋白允许 Rb-E2F 复合物结合 DNA。

DOI:
10.1128/mcb.12.10.4327-4333.1992
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发表时间:
1992
影响因子:
5.3
通讯作者:
Raychaudhuri,P
Raychaudhuri,P
中科院分区:
生物学2区
文献类型:
--
作者:
Ray,SK;Arroyo,M;Bagchi,S;Raychaudhuri,P

文献摘要

相似文献

一些报告表明,视网膜母细胞瘤基因 (Rb) 的产物与转录因子 E2F 形成复合物。我们提供的证据表明,Rb-E2F 复合物的 DNA 结合涉及另一个细胞因素。向纯化的 E2F 制剂中添加 Rb 不会产生可结合 DNA 的 Rb-E2F 复合物,事实上,我们发现 E2F 的 DNA 结合能力受到抑制。另一方面,将 Rb 添加到 E2F 的粗制剂中会导致形成 Rb-E2F 复合物 (E2Fr),该复合物可以结合 DNA 并在凝胶阻滞测定中产生独特的复合物。我们已经鉴定并纯化了一种允许 Rb-E2F 复合物结合 DNA 的 60 kDa 蛋白质,并且我们表明这种 60 kDa 蛋白质通过直接与 Rb 相互作用来发挥其作用。
Several reports have indicated that the product of the retinoblastoma gene (Rb) complexes with the transcription factor E2F. We present evidence that the DNA-binding of the Rb-E2F complex involves another cellular factor. Addition of Rb to purified preparations of E2F does not generate an Rb-E2F complex that can bind DNA, and in fact, we see an inhibition of the DNA-binding ability of E2F. On the other hand, addition of Rb to cruder preparations of E2F results in the formation of an Rb-E2F complex (E2Fr) that can bind DNA and produces a distinct complex in gel retardation assays. We have identified and purified a 60-kDa protein that allows the Rb-E2F complex to bind DNA, and we show that this 60-kDa protein exerts its effect by directly interacting with Rb.