Sestrin 1, also known as p53-regulated protein PA26, is a protein that in humans is encoded by the SESN1gene.
This gene encodes a member of the sestrin family. Sestrins are induced by the p53 tumor suppressor protein and play a role in the cellular response to DNA damage and oxidative stress.
The encoded protein mediates p53 inhibition of cell growth by activating AMP-activated protein kinase, which results in the inhibition of the mammalian target of rapamycin protein. The encoded protein also plays a critical role in antioxidant defense by regenerating overoxidized peroxiredoxins, and the expression of this gene is a potential marker for exposure to radiation. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene.[5][6][7]
Peeters H, Debeer P, Bairoch A, Wilquet V, Huysmans C, Parthoens E, Fryns JP, Gewillig M, Nakamura Y, Niikawa N, Van de Ven W, Devriendt K (May 2003). "PA26 is a candidate gene for heterotaxia in humans: identification of a novel PA26-related gene family in human and mouse". Human Genetics. 112 (5–6): 573–80. doi:10.1007/s00439-003-0917-5. PMID12607115. S2CID22257894.
Jing, Y., Zuo, Y., Sun, L., Yu, Z. R., Ma, S., Hu, H., ... & Wang, S. (2023). "SESN1 is a FOXO3 effector that counteracts human skeletal muscle ageing". Cell Proliferation, e13455. PMID37199024PMC10212707doi:10.1111/cpr.13455