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Symbol: hsp-12.6 Name: Heat Shock Protein Alias: hsp-20 Entrez gene ID: 177778 Ensembl gene ID: F38E11.2 Species: Worm (Taxid: 6239) Functional description: Protein HSP-12.6; Heat Shock Protein family member (hsp-12.6) [Source:RefSeq peptide;Acc:NP_501668] [Ensembl]; hsp-12.6 encodes a small heat-shock protein with very short N- and C-terminal domains flanking its central region of similarity to alpha-crystallins; HSP-12.6 is required in vivo for normal lifespan; HSP-12.6 is predominantly and ubiquitously expressed in L1 larvae without any obvious induction by stressors; but, in adult hermaphrodites, at least one HSP-12 is also expressed in spermatids (and perhaps spermatocytes), as well as in some vulval cells; moreover, hsp-12.6 is upregulated in 6- and 10-day-old daf-2 mutants, and this upregulation is highly reproducible (like that of five other genes, vit-2, vit-5, fat-3, nid-1, and mtl-1), strongly suggesting that hsp-12.6's expression may contribute to prolonged lifespan in dauer larvae; the hsp-12.6 promoter is predicted to have both DAF-16 and HSF-1 binding sites; hsp-12.6(RNAi) animals are shorter-lived than normal; recombinant HSP-12.6 is monomeric, and lacks molecular chaperone activity in vitro; hsp-12.6 induction requires DAF-16 and HSP-1, but not SMK-1. [WormBase] Observation: hsp-12.6 loss-of-function mutation significantly extends lifespan under AL and significantly suppresses intermittent fasting (IF)-induced increase in lifespan, to a similar extend to that of daf-16 mutation. HSP-12.6 expression is induced by fasting in various tissues, including body wall muscle and neuronal systems. hsp-16.2 is one of downstream targets of DAF-16 in IF-induced longevity. The extent of IF-induced longevity in daf-16 hsp-12.6 double mutant is similar to that of single hsp-12.6 or daf-16 mutants. hsp-12.6 and daf-16 function in same signaling pathway. Low insulin/IGF-like signaling in daf-2 results in constitutive activation of DAF-16 and higher expression of hsp-12.6 [19079239]. Expression of hsp-16.2 predicts longevity [13-18 in 22829775]. Interventions: Assays: Organismal Lifespan Classification: Aging Relevance Analysis/Source:  GenAge GenDRHomologs Orthologs Edit \ Update (Admin) | Delete |
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