Spatial alterations of De Novo purine biosynthetic enzymes by Akt-independent PDK1 signaling pathways.
Spatial alterations of De Novo purine biosynthetic enzymes by Akt-independent PDK1 signaling pathways.
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DOI:
10.1371/journal.pone.0195989
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
An S
中科院分区:
文献类型:
--
作者:
Schmitt DL;Sundaram A;Jeon M;Luu BT;An S
A macromolecular complex of the enzymes involved in human de novo purine biosynthesis, the purinosome, has been shown to consist of a core assembly to regulate the metabolic activity of the pathway. However, it remains elusive whether the core assembly itself can be selectively controlled in the cytoplasm without promoting the purinosome. Here, we reveal that pharmacological inhibition of the cytoplasmic activity of 3-phosphoinositide-dependent protein kinase 1 (PDK1) selectively promotes the formation of the core assembly, but not the purinosome, in cancer cells. However, alternative signaling cascades that are associated with the plasma membrane-bound PDK1 activity, including Akt-mediated cascades, regulate neither the core assembly nor the purinosome in our conditions. Along with immunofluorescence microscopy and a knock-down study against PDK1 using small interfering RNAs, we reveal that cytoplasmic PDK1-associated signaling pathways regulate subcellular colocalization of three enzymes that form the core assembly of the purinosome in an Akt-independent manner. Collectively, this study reveals a new mode of compartmentalization of purine biosynthetic enzymes controlled by spatially resolved signaling pathways.
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影响因子:
8
作者:
通讯作者:
--
影响因子:
2.9
作者:
Kyoung M;Russell SJ;Kohnhorst CL;Esemoto NN;An S
通讯作者:
An S
影响因子:
56.9
作者:
ELION, GB
通讯作者:
ELION, GB
影响因子:
13.8
作者:
Pedley AM;Benkovic SJ
通讯作者:
Benkovic SJ
DOI:
10.1126/science.aac6054
发表时间:
2016-02-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
French JB;Jones SA;Deng H;Pedley AM;Kim D;Chan CY;Hu H;Pugh RJ;Zhao H;Zhang Y;Huang TJ;Fang Y;Zhuang X;Benkovic SJ
通讯作者:
Benkovic SJ