Microchip-Based Structure Determination of Disease-Relevant p53.

Microchip-Based Structure Determination of Disease-Relevant p53.
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DOI:
10.1021/acs.analchem.0c03599
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发表时间:
2020-12-01
影响因子:
7.4
通讯作者:
Kelly DF
Kelly DF
中科院分区:
化学1区
文献类型:
--
作者:
Solares MJ;Jonaid GM;Luqiu WY;Liang Y;Evans MC;Dearnaley WJ;Sheng Z;Kelly DF

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肿瘤抑制蛋白TP53(P53)在人体所有细胞中发挥着多方面的作用。TP53基因的突变通常与癌症的诱发和疾病的进展有关。尽管P53在健康和发育中起着重要作用,但它的结构信息仍然不完整。在这里,我们提出了一种基于微芯片的技术,以促进来自人类癌细胞的P53组件的结构研究。这些装置不会将外来序列引入p53基因,并保持自然发生的翻译后修饰。冷冻电子显微镜下,P53单体(~50 kDa)和四聚体(~200 kDa)的结构分别分解为~4.8和~7?这些结构揭示了对P53的灵活区域以及生物学上相关的泛素作用位点的新见解。总的来说,纳米技术工具和结构成像的融合建立了一个强大的框架,以了解p53在人类组织中的致癌影响。
The tumor suppressor protein TP53 (p53) plays a multifaceted role in all cells of the human body. Mutations in the TP53 gene are often involved in cancer induction and disease progression. Despite its important role in health and development, structural information for p53 remains incomplete. Here, we present a microchip-based technology to facilitate structural studies of p53 assemblies derived from human cancer cells. These devices do not introduce foreign sequences to the p53 gene and maintain naturally occurring post-translational modifications. Using cryo-electron microscopy, structures for the p53 monomer (~50 kDa) and tetramer (~200 kDa) were resolved to ~4.8 and ~7 Å, respectively. These structures revealed new insights for flexible regions of p53 along with biologically relevant ubiauitination sites. Collectively, the convergence of nanotechnology tools and structural imaging builds a strong framework to understand the oncogenic impact of p53 in human tissues.
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