The transcription coactivator CBP is a dynamic component of the promyelocytic leukemia nuclear body.

The transcription coactivator CBP is a dynamic component of the promyelocytic leukemia nuclear body.
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DOI:
10.1083/jcb.152.5.1099
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发表时间:
2001-03-05
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Bazett-Jones DP
Bazett-Jones DP
中科院分区:
其他
文献类型:
--
作者:
Boisvert FM;Kruhlak MJ;Box AK;Hendzel MJ;Bazett-Jones DP

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转录辅激活因子和组蛋白乙酰转移酶CAMP反应元件结合蛋白(CBP)已被证明在早幼粒细胞白血病(PML)小体中积累。我们表明这种积累具有细胞类型特异性。在CBP通常不在PML小体中积累的细胞中,通过过表达CBP或Pml(而非Sp100)可诱导其在PML小体中积累。利用光漂白后的荧光恢复技术,我们证明CBP快速进出PML小体。相比之下,Pml和Sp100在核质以及PML核小体内相对不移动。它们具有预期的蛋白质特性,即在这些亚核结构域的完整性中发挥结构作用。我们的结果与CBP是PML小体的动态成分且这些结构中的稳态水平可由Pml调节这一观点相符。
The transcription coactivator and histone acetyltransferase CAMP response element–binding protein (CBP) has been demonstrated to accumulate in promyelocytic leukemia (PML) bodies. We show that this accumulation is cell type specific. In cells where CBP does not normally accumulate in PML bodies, it can be induced to accumulate in PML bodies through overexpression of either CBP or Pml, but not Sp100. Using fluorescence recovery after photobleaching, we demonstrate that CBP moves rapidly into and out of PML bodies. In contrast, Pml and Sp100 are relatively immobile in the nucleoplasm and within PML nuclear bodies. They possess the characteristics expected of proteins that would play a structural role in the integrity of these subnuclear domains. Our results are consistent with CBP being a dynamic component of PML bodies and that the steady-state level in these structures can be modulated by Pml.
大分子大小的溶质在细胞质和核中的平移扩散。
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DOI: 10.1083/jcb.150.1.41
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