National Institutes of Health/National Cancer Institute (NIH/NCI)
R01CA193578
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
R01CA219700
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
R01CA227261
米国
引用
ジャーナル: Anal Chem / 年: 2020 タイトル: Microchip-Based Structure Determination of Disease-Relevant p53. 著者: Maria J Solares / G M Jonaid / William Y Luqiu / Yanping Liang / Madison C Evans / William J Dearnaley / Zhi Sheng / Deborah F Kelly / 要旨: The tumor suppressor protein TP53 (p53) plays a multifaceted role in all cells of the human body. Mutations in the gene are often involved in cancer induction and disease progression. Despite its ...The tumor suppressor protein TP53 (p53) plays a multifaceted role in all cells of the human body. Mutations in the 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 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 ubiquitination sites. Collectively, the convergence of nanotechnology tools and structural imaging builds a strong framework to understand the oncogenic impact of p53 in human tissues.