Hexokinase-II positively regulates glucose starvation-induced autophagy through TORC1 inhibition.
Hexokinase-II positively regulates glucose starvation-induced autophagy through TORC1 inhibition.
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DOI:
10.1016/j.molcel.2013.12.019
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发表时间:
2014-02-20
期刊:
影响因子:
16
通讯作者:
Miyamoto, Shigeki
中科院分区:
文献类型:
--
作者:
Roberts, David J.;Tan-Sah, Valerie P.;Ding, Eric Y.;Smith, Jeffery M.;Miyamoto, Shigeki
Hexokinase-II (HK-II) catalyzes the first step of glycolysis and also functions as a protective molecule, however, its role in protective autophagy has not been determined. Results showed that inhibition of HK-II diminished, while overexpression of HK-II potentiated, autophagy induced by glucose deprivation in cardiomyocyte and non-cardiomyocyte cells. Immunoprecipitation studies revealed that HK-II binds to and inhibits the autophagy suppressor, mTOR complex 1 (TORC1), and this binding was increased by glucose deprivation. The TOS motif, a scaffold sequence responsible for binding TORC1 substrates, is present in HK-II and mutating it blocked its ability to bind to TORC1 and regulate protective autophagy. The transition from glycolysis to autophagy appears to be regulated by a decrease in glucose-6 phosphate. We suggest that HK-II binds TORC1 as a decoy substrate and provides a previously unrecognized mechanism for switching cells from a metabolic economy based on plentiful energy, to one of conservation, under starvation.
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DOI:
10.1126/science.1196371
发表时间:
2011-01-28
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Egan DF;Shackelford DB;Mihaylova MM;Gelino S;Kohnz RA;Mair W;Vasquez DS;Joshi A;Gwinn DM;Taylor R;Asara JM;Fitzpatrick J;Dillin A;Viollet B;Kundu M;Hansen M;Shaw RJ
通讯作者:
Shaw RJ
影响因子:
21.3
作者:
通讯作者:
--
影响因子:
16
作者:
Kim, DH;Sarbassov, DD;Sabatini, DM
通讯作者:
Sabatini, DM
影响因子:
5.3
作者:
Bhaskar, Prashanth T.;Nogueira, Veronique;Hay, Nissim
通讯作者:
Hay, Nissim
影响因子:
3.7
作者:
John S;Weiss JN;Ribalet B
通讯作者:
Ribalet B