SESN2

Sestrin-2 also known as Hi95 is a protein that in humans is encoded by the SESN2 gene.

SESN2
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 5DJ4, 5CUF
Identifiers
Aliases	SESN2, HI95, SES2, SEST2, sestrin 2
External IDs	OMIM: 607767; MGI: 2651874; HomoloGene: 12873; GeneCards: SESN2; OMA:SESN2 - orthologs
Gene location (Human) Chr. Chromosome 1 (human) Band 1p35.3 Start 28,259,518 bp End 28,282,491 bp
Gene location (Mouse) Chr. Chromosome 4 (mouse) Band 4|4 D2.3 Start 132,219,343 bp End 132,237,812 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in right ovary gonad left ovary stromal cell of endometrium mucosa of transverse colon right lobe of liver duodenum blood islet of Langerhans human kidney Top expressed in granulocyte right kidney calvaria proximal tubule stroma of bone marrow yolk sac Rostral migratory stream spermatocyte lip internal carotid artery More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding oxidoreductase activity, acting on peroxide as acceptor leucine binding sulfiredoxin activity oxidoreductase activity GDP-dissociation inhibitor activity Cellular component nucleus mitochondrion cytosol cytoplasm GATOR2 complex nucleotide-activated protein kinase complex Atg1/ULK1 kinase complex TORC2 complex Biological process mitochondrial DNA metabolic process mitochondrion organization protein kinase B signaling regulation of cAMP-dependent protein kinase activity response to insulin response to glucose glucose homeostasis glucose import regulation of response to reactive oxygen species triglyceride homeostasis fatty acid beta-oxidation negative regulation of TORC1 signaling positive regulation of transcription from RNA polymerase II promoter in response to oxidative stress reactive oxygen species metabolic process positive regulation of macroautophagy cellular response to amino acid stimulus regulation of protein phosphorylation DNA damage response, signal transduction by p53 class mediator cellular response to leucine positive regulation of protein localization to nucleus cellular oxidant detoxification negative regulation of cell growth cellular response to oxidative stress negative regulation of translation in response to endoplasmic reticulum stress positive regulation of lipophagy cellular response to amino acid starvation cellular response to glucose starvation cellular response to leucine starvation regulation of gluconeogenesis Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 83667 230784 Ensembl ENSG00000130766 ENSG00000285069 ENSMUSG00000028893 UniProt P58004 P58043 RefSeq (mRNA) NM_031459 NM_144907 RefSeq (protein) NP_113647 NP_659156 Location (UCSC) Chr 1: 28.26 – 28.28 Mb Chr 4: 132.22 – 132.24 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Function

This gene encodes a member of the sestrin family of PA26-related proteins. The encoded protein may function in the regulation of cell growth and survival. This protein may be involved in cellular response to different stress conditions. The Sestrins constitute a family of evolutionarily-conserved stress-inducible proteins that suppress oxidative stress and regulate adenosine monophosphate-dependent protein kinase (AMPK)-mammalian target of rapamycin (mTOR) signaling. By virtue of these activities, the Sestrins serve as important regulators of metabolic homeostasis. Accordingly, inactivation of Sestrin genes in invertebrates resulted in diverse metabolic pathologies, including oxidative damage, fat accumulation, mitochondrial dysfunction and muscle degeneration that resemble accelerated tissue aging.

Ligands

The NMDA receptor antagonist ketamine has been found to activate the mammalian target of rapamycin complex 1 (mTORC1) pathway in the medial prefrontal cortex (mPFC) of the brain as an essential downstream mechanism in the mediation of its rapid-acting antidepressant effects. NV-5138 is a ligand and modulator of sestrin2, a leucine amino acid sensor and upstream regulatory pathway of mTORC1, and is under development for the treatment of depression. The drug has been found to directly and selectively activate the mTORC1 pathway, including in the mPFC, and to produce rapid-acting antidepressant effects similar to those of ketamine.

See also

• SESN1

Further reading

• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Budanov AV, Sablina AA, Feinstein E, et al. (2004). "Regeneration of peroxiredoxins by p53-regulated sestrins, homologs of bacterial AhpD". Science. 304 (5670): 596–600. Bibcode:2004Sci...304..596B. doi:10.1126/science.1095569. PMID 15105503. S2CID 27871118.
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Simpson JC, Wellenreuther R, Poustka A, et al. (2001). "Systematic subcellular localization of novel proteins identified by large-scale cDNA sequencing". EMBO Rep. 1 (3): 287–92. doi:10.1093/embo-reports/kvd058. PMC 1083732. PMID 11256614.
• Wiemann S, Weil B, Wellenreuther R, et al. (2001). "Toward a Catalog of Human Genes and Proteins: Sequencing and Analysis of 500 Novel Complete Protein Coding Human cDNAs". Genome Res. 11 (3): 422–35. doi:10.1101/gr.GR1547R. PMC 311072. PMID 11230166.