Rapid inactivation of proteins by rapamycin-induced rerouting to mitochondria.

Rapid inactivation of proteins by rapamycin-induced rerouting to mitochondria.
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DOI:
10.1016/j.devcel.2009.12.015
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发表时间:
2010-02-16
期刊:
影响因子:
11.8
通讯作者:
Foster SD
Foster SD
中科院分区:
生物学1区
文献类型:
--
作者:
Robinson MS;Sahlender DA;Foster SD

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We have developed a method for rapidly inactivating proteins with rapamycin-induced heterodimerization. Cells were stably transfected with siRNA-resistant, FKBP-tagged subunits of the adaptor protein (AP) complexes of clathrin-coated vesicles (CCVs), together with an FKBP and rapamycin-binding domain-containing construct with a mitochondrial targeting signal. Knocking down the endogenous subunit with siRNA, and then adding rapamycin, caused the APs to be rerouted to mitochondria within seconds. Rerouting AP-2 to mitochondria effectively abolished clathrin-mediated endocytosis of transferrin. In cells with rerouted AP-1, endocytosed cation-independent mannose 6-phosphate receptor (CIMPR) accumulated in a peripheral compartment, and isolated CCVs had reduced levels of CIMPR, but normal levels of the lysosomal hydrolase DNase II. Both observations support a role for AP-1 in retrograde trafficking. This type of approach, which we call a “knocksideways,” should be widely applicable as a means of inactivating proteins with a time scale of seconds or minutes rather than days. ► We have developed a way of getting rid of proteins quickly (i.e., minutes not days) ► This approach provides new insights into the function of the coat protein AP-1
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