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
中科院分区:
文献类型:
--
作者:
Ray,SK;Arroyo,M;Bagchi,S;Raychaudhuri,P
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.