A fluorescent reporter of AMPK activity and cellular energy stress.
A fluorescent reporter of AMPK activity and cellular energy stress.
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DOI:
10.1016/j.cmet.2011.03.006
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发表时间:
2011-04-06
期刊:
影响因子:
29
通讯作者:
Cantley LC
中科院分区:
文献类型:
--
作者:
Tsou P;Zheng B;Hsu CH;Sasaki AT;Cantley LC
AMP-activated protein kinase (AMPK) is activated when the AMP/ATP ratio in cells is elevated due to energy stress. Here we describe a biosensor, AMPKAR, which exhibits enhanced fluorescence resonance energy transfer (FRET) in response to phosphorylation by AMPK, allowing spatio-temporal monitoring of AMPK activity in single cells. We show that this reporter responds to a variety of stimuli that are known to induce energy stress and that the response is dependent on AMPK α1 & α2 and on the upstream kinase, LKB1. Interestingly we found that AMPK activation is confined to the cytosol in response to energy stress but can be observed in both the cytosol and nucleus in response to calcium elevation. Finally, using this probe with U2OS cells in a microfluidics device, we observed a very high cell-to-cell variability in the amplitude and time course of AMPK activation and recovery in response to pulses of glucose deprivation.
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影响因子:
--
作者:
Hawley SA;Boudeau J;Reid JL;Mustard KJ;Udd L;Mäkelä TP;Alessi DR;Hardie DG
通讯作者:
Hardie DG
影响因子:
4.1
作者:
Sanders, Matthew J.;Grondin, Pascal O.;Carling, David
通讯作者:
Carling, David
影响因子:
16
作者:
Cohen-Saidon, Cellina;Cohen, Ariel A.;Alon, Uri
通讯作者:
Alon, Uri
DOI:
10.1073/pnas.1009705107
发表时间:
2010-11-09
影响因子:
11.1
作者:
Oakhill, Jonathan S.;Chen, Zhi-Ping;Kemp, Bruce E.
通讯作者:
Kemp, Bruce E.
影响因子:
56.9
作者:
Shaw, RJ;Lamia, KA;Cantley, LC
通讯作者:
Cantley, LC