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.
中科院分区:
文献类型:
--
作者:
Bonger, Kimberly M.;Chen, Ling-chun;Liu, Corey W.;Wandless, Thomas J.
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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