SAMTOR is an S-adenosylmethionine sensor for the mTORC1 pathway.
SAMTOR is an S-adenosylmethionine sensor for the mTORC1 pathway.
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DOI:
10.1126/science.aao3265
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发表时间:
2017-11-10
期刊:
影响因子:
--
通讯作者:
Sabatini DM
中科院分区:
文献类型:
--
作者:
Gu X;Orozco JM;Saxton RA;Condon KJ;Liu GY;Krawczyk PA;Scaria SM;Harper JW;Gygi SP;Sabatini DM
mTOR complex 1 (mTORC1) regulates cell growth and metabolism in response to multiple environmental cues. Nutrients signal via the Rag guanosine triphosphatases (GTPases) to promote the localization of mTORC1 to the lysosomal surface, its site of activation. We identified SAMTOR, a previously uncharacterized protein, which inhibits mTORC1 signaling by interacting with GATOR1, the GTPase activating protein (GAP) for RagA/B. We found that the methyl donor S-adenosylmethionine (SAM) disrupts the SAMTOR-GATOR1 complex by binding directly to SAMTOR with a dissociation constant of approximately 7 μM. In cells, methionine starvation reduces SAM levels below this dissociation constant and promotes the association of SAMTOR with GATOR1, thereby inhibiting mTORC1 signaling in a SAMTOR-dependent fashion. Methionine-induced activation of mTORC1 requires the SAM binding capacity of SAMTOR. Thus, SAMTOR is a SAM sensor that links methionine and one-carbon metabolism to mTORC1 signaling.
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影响因子:
8.8
作者:
Chantranupong L;Wolfson RL;Orozco JM;Saxton RA;Scaria SM;Bar-Peled L;Spooner E;Isasa M;Gygi SP;Sabatini DM
通讯作者:
Sabatini DM
DOI:
10.1126/science.aad2087
发表时间:
2016-01-01
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Saxton RA;Knockenhauer KE;Wolfson RL;Chantranupong L;Pacold ME;Wang T;Schwartz TU;Sabatini DM
通讯作者:
Sabatini DM
影响因子:
--
作者:
Kozbial PZ;Mushegian AR
通讯作者:
Mushegian AR
影响因子:
64.8
作者:
Huttlin EL;Bruckner RJ;Paulo JA;Cannon JR;Ting L;Baltier K;Colby G;Gebreab F;Gygi MP;Parzen H;Szpyt J;Tam S;Zarraga G;Pontano-Vaites L;Swarup S;White AE;Schweppe DK;Rad R;Erickson BK;Obar RA;Guruharsha KG;Li K;Artavanis-Tsakonas S;Gygi SP;Harper JW
通讯作者:
Harper JW
影响因子:
21.3
作者:
通讯作者:
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