Small-molecule displacement of a cryptic degron causes conditional protein degradation.

Small-molecule displacement of a cryptic degron causes conditional protein degradation.
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DOI:
10.1038/nchembio.598
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发表时间:
2011-07-03
影响因子:
14.8
通讯作者:
Wandless, Thomas J.
Wandless, Thomas J.
中科院分区:
生物学1区
文献类型:
--
作者:
Bonger, Kimberly M.;Chen, Ling-chun;Liu, Corey W.;Wandless, Thomas J.

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快速调节活细胞中特定蛋白质功能的能力是生物学研究的宝贵工具。在这里,我们描述了一种新的技术,通过这种技术,特定蛋白质的降解是由一个小分子诱导的。目的蛋白质与配体诱导的降解(LID)结构域融合,导致稳定和功能性融合蛋白的表达。LID结构域由FK 506和雷帕霉素结合蛋白(FKBP)和与FKBP C末端融合的19个氨基酸的降解决定子组成。在不存在小分子Shield-1的情况下,降解决定子与FKBP蛋白结合,并且融合蛋白是稳定的。Shield-1与FKBP紧密结合,从而置换降解决定子并诱导LID结构域和任何融合伴侣蛋白的快速和进行性降解。对19个残基的肽的结构-功能研究表明,肽内的4个氨基酸序列负责降解。
The ability to rapidly regulate the functions of specific proteins in living cells is a valuable tool for biological research. Here we describe a novel technique by which the degradation of a specific protein is induced by a small molecule. A protein of interest is fused to a Ligand-Induced Degradation (LID) domain resulting in the expression of a stable and functional fusion protein. The LID domain is comprised of the FK506- and rapamycin-binding protein (FKBP) and a 19-amino acid degron fused to the C-terminus of FKBP. In the absence of the small molecule Shield-1, the degron binds to the FKBP protein and the fusion protein is stable. Shield-1 binds tightly to FKBP thereby displacing the degron and inducing rapid and processive degradation of the LID domain and any fused partner protein. Structure-function studies of the 19-residue peptide showed that a four-amino acid sequence within the peptide is responsible for degradation.
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