Post-transcriptional Regulation of De Novo Lipogenesis by mTORC1-S6K1-SRPK2 Signaling.
Post-transcriptional Regulation of De Novo Lipogenesis by mTORC1-S6K1-SRPK2 Signaling.
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DOI:
10.1016/j.cell.2017.10.037
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发表时间:
2017-12-14
期刊:
影响因子:
64.5
通讯作者:
Blenis J
中科院分区:
文献类型:
--
作者:
Lee G;Zheng Y;Cho S;Jang C;England C;Dempsey JM;Yu Y;Liu X;He L;Cavaliere PM;Chavez A;Zhang E;Isik M;Couvillon A;Dephoure NE;Blackwell TK;Yu JJ;Rabinowitz JD;Cantley LC;Blenis J
mTORC1 is a signal integrator and master regulator of cellular anabolic processes linked to cell growth and survival. Here we demonstrate that mTORC1 promotes lipid biogenesis via SRPK2, a key regulator of RNA-binding SR proteins. mTORC1-activated S6K1 phosphorylates SRPK2 at Ser494, which primes Ser497 phosphorylation by CK1. These phosphorylation events promote SRPK2 nuclear translocation and phosphorylation of SR proteins. Genome-wide transcriptome analysis reveals that lipid biosynthetic enzymes are among the downstream targets of mTORC1-SRPK2 signaling. Mechanistically, SRPK2 promotes SR protein binding to U1-70k to induce splicing of lipogenic pre-mRNAs. Inhibition of this signaling pathway leads to intron retention of lipogenic genes which triggers nonsense-mediated mRNA decay. Genetic or pharmacological inhibition of SRPK2 blunts de novo lipid synthesis, thereby suppressing cell growth. These results thus reveal a novel role of mTORC1-SRPK2 signaling in post-transcriptional regulation of lipid metabolism and demonstrate that SRPK2 is a potential therapeutic target for mTORC1-driven metabolic disorders.
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影响因子:
16
作者:
Gao D;Inuzuka H;Tan MK;Fukushima H;Locasale JW;Liu P;Wan L;Zhai B;Chin YR;Shaik S;Lyssiotis CA;Gygi SP;Toker A;Cantley LC;Asara JM;Harper JW;Wei W
通讯作者:
Wei W
DOI:
10.3109/10409238.2015.1031879
发表时间:
2015
影响因子:
6.5
作者:
Gonzalez Herrera KN;Lee J;Haigis MC
通讯作者:
Haigis MC
DOI:
10.1126/science.aad8711
发表时间:
2016-06-17
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Gilbert WV;Bell TA;Schaening C
通讯作者:
Schaening C
DOI:
10.1073/pnas.1017700108
发表时间:
2011-05-17
影响因子:
11.1
作者:
Cho, Suhyung;Hoang, Amy;Ghosh, Gourisankar
通讯作者:
Ghosh, Gourisankar
影响因子:
3.4
作者:
Boersema, Paul J.;Aye, Thin Thin;Mohammed, Shabaz
通讯作者:
Mohammed, Shabaz