FUNCTION: Functions as an intracellular leucine sensor that negatively regulates the TORC1 signaling pathway through the GATOR complex. In absence of leucine, binds the GATOR subcomplex GATOR2 and prevents TORC1 signaling (PubMed:18692468, PubMed:25263562, PubMed:25457612, PubMed:26449471, PubMed:26...
FUNCTION: Functions as an intracellular leucine sensor that negatively regulates the TORC1 signaling pathway through the GATOR complex. In absence of leucine, binds the GATOR subcomplex GATOR2 and prevents TORC1 signaling (PubMed:18692468, PubMed:25263562, PubMed:25457612, PubMed:26449471, PubMed:26612684, PubMed:26586190, PubMed:31586034). Binding of leucine to SESN2 disrupts its interaction with GATOR2 thereby activating the TORC1 signaling pathway (PubMed:26449471, PubMed:26586190). This stress-inducible metabolic regulator also plays a role in protection against oxidative and genotoxic stresses. May negatively regulate protein translation in response to endoplasmic reticulum stress, via TORC1 (PubMed:24947615). May positively regulate the transcription by NFE2L2 of genes involved in the response to oxidative stress by facilitating the SQSTM1-mediated autophagic degradation of KEAP1 (PubMed:23274085). May also mediate TP53 inhibition of TORC1 signaling upon genotoxic stress (PubMed:18692468). Moreover, may prevent the accumulation of reactive oxygen species (ROS) through the alkylhydroperoxide reductase activity born by the N-terminal domain of the protein (PubMed:26612684). Was originally reported to contribute to oxidative stress resistance by reducing PRDX1 (PubMed:15105503). However, this could not be confirmed (PubMed:19113821). {ECO:0000269|PubMed:15105503, ECO:0000269|PubMed:18692468, ECO:0000269|PubMed:19113821, ECO:0000269|PubMed:23274085, ECO:0000269|PubMed:24947615, ECO:0000269|PubMed:25263562, ECO:0000269|PubMed:25457612, ECO:0000269|PubMed:26449471, ECO:0000269|PubMed:26586190, ECO:0000269|PubMed:26612684}.
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GO - Biological processes (BP):
cellular oxidant detoxification [GO:0098869]; cellular response to amino acid starvation [GO:0034198]; cellular response to amino acid stimulus [GO:0071230]; cellular response to glucose starvation [GO:0042149]; cellular response to leucine [GO:0071233]; cellular response to leucine starvation [GO:1...
cellular oxidant detoxification [GO:0098869]; cellular response to amino acid starvation [GO:0034198]; cellular response to amino acid stimulus [GO:0071230]; cellular response to glucose starvation [GO:0042149]; cellular response to leucine [GO:0071233]; cellular response to leucine starvation [GO:1990253]; cellular response to oxidative stress [GO:0034599]; DNA damage response, signal transduction by p53 class mediator [GO:0030330]; fatty acid beta-oxidation [GO:0006635]; glucose homeostasis [GO:0042593]; glucose import [GO:0046323]; mitochondrial DNA metabolic process [GO:0032042]; negative regulation of cell growth [GO:0030308]; negative regulation of TORC1 signaling [GO:1904262]; negative regulation of translation in response to endoplasmic reticulum stress [GO:1902010]; positive regulation of lipophagy [GO:1904504]; positive regulation of macroautophagy [GO:0016239]; positive regulation of protein localization to nucleus [GO:1900182]; positive regulation of transcription from RNA polymerase II promoter in response to oxidative stress [GO:0036091]; protein kinase B signaling [GO:0043491]; reactive oxygen species metabolic process [GO:0072593]; regulation of cAMP-dependent protein kinase activity [GO:2000479]; regulation of gluconeogenesis [GO:0006111]; regulation of protein phosphorylation [GO:0001932]; regulation of response to reactive oxygen species [GO:1901031]; response to glucose [GO:0009749]; response to insulin [GO:0032868]; triglyceride homeostasis [GO:0070328]
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GO - Molecular function (MF):
GDP-dissociation inhibitor activity [GO:0005092]; leucine binding [GO:0070728]; oxidoreductase activity, acting on peroxide as acceptor [GO:0016684]; protein-containing complex binding [GO:0044877]; sulfiredoxin activity [GO:0032542]...
GDP-dissociation inhibitor activity [GO:0005092]; leucine binding [GO:0070728]; oxidoreductase activity, acting on peroxide as acceptor [GO:0016684]; protein-containing complex binding [GO:0044877]; sulfiredoxin activity [GO:0032542]
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GO - Cellular component (CC):
Atg1/ULK1 kinase complex [GO:1990316]; cytoplasm [GO:0005737]; cytosol [GO:0005829]; mitochondrion [GO:0005739]; nucleotide-activated protein kinase complex [GO:0031588]; nucleus [GO:0005634]; TORC2 complex [GO:0031932]...
Atg1/ULK1 kinase complex [GO:1990316]; cytoplasm [GO:0005737]; cytosol [GO:0005829]; mitochondrion [GO:0005739]; nucleotide-activated protein kinase complex [GO:0031588]; nucleus [GO:0005634]; TORC2 complex [GO:0031932]
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