GATOR1 regulates nitrogenic cataplerotic reactions of the mitochondrial TCA cycle.
GATOR1 regulates nitrogenic cataplerotic reactions of the mitochondrial TCA cycle.
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DOI:
10.1038/nchembio.2478
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发表时间:
2017-11
影响因子:
14.8
通讯作者:
Tu BP
中科院分区:
文献类型:
--
作者:
Chen J;Sutter BM;Shi L;Tu BP
The GATOR1/SEACIT complex consisting of Iml1-Npr2-Npr3 inhibits Target of Rapamycin Complex 1 (TORC1) in response to amino acid insufficiency. In glucose medium, Saccharomyces cerevisiae mutants lacking the function of this complex grow poorly in the absence of amino acid supplementation, despite hallmarks of increased TORC1 signaling. Such mutants perceive they are amino acid-replete and thus repress metabolic activities that are important for achieving this state. We find that npr2Δ mutants have defective mitochondrial TCA cycle activity and retrograde response. Supplementation of glutamine, and especially aspartate, which are nitrogen-containing forms of TCA cycle intermediates, rescue growth of npr2Δ mutants. These amino acids are then consumed in biosynthetic pathways that require nitrogen to support proliferative metabolism. Our findings reveal that negative regulators of TORC1 such as GATOR1/SEACIT regulate the cataplerotic synthesis of these amino acids from the TCA cycle in tune with the amino acid and nitrogen status of cells.
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影响因子:
3.2
作者:
COURCHESNE, WE;MAGASANIK, B
通讯作者:
MAGASANIK, B
DOI:
10.1007/978-1-4939-0473-0_26
发表时间:
2014-01-01
期刊:
PSEUDOMONAS: METHODS AND PROTOCOLS
影响因子:
--
作者:
Kern, Suzanne E.;Price-Whelan, Alexa;Newman, Dianne K.
通讯作者:
Newman, Dianne K.
影响因子:
3.3
作者:
Loewith R;Hall MN
通讯作者:
Hall MN
影响因子:
3.7
作者:
González A;Shimobayashi M;Eisenberg T;Merle DA;Pendl T;Hall MN;Moustafa T
通讯作者:
Moustafa T
影响因子:
7.3
作者:
Laxman S;Sutter BM;Shi L;Tu BP
通讯作者:
Tu BP