期刊
CELLULAR AND MOLECULAR LIFE SCIENCES
卷 72, 期 20, 页码 3897-3914出版社
SPRINGER BASEL AG
DOI: 10.1007/s00018-015-1978-z
关键词
Aging; Epigenetics; Longevity; Mitochondria; Oxidative stress; Senescence
资金
- Academy of Finland
- VTR from Kuopio University Hospital
- Finnish Cultural Foundation
- Alfred Kordelin Foundation
Recent studies have revealed that the members of an ancient family of nonheme Fe2+/2-oxoglutarate-dependent dioxygenases (2-OGDO) are involved in the functions associated with the aging process. 2-Oxoglutarate and O-2 are the obligatory substrates and Fe2+ a cofactor in the activation of 2-OGDO enzymes, which can induce the hydroxylation of distinct proteins and the demethylation of DNA and histones. For instance, ten-eleven translocation 1-3 (TET1-3) are the demethylases of DNA, whereas Jumonji C domain-containing histone lysine demethylases (KDM2-7) are the major epigenetic regulators of chromatin landscape, known to be altered with aging. The functions of hypoxia-inducible factor (HIF) prolyl hydroxylases (PHD1-3) as well as those of collagen hydroxylases are associated with age-related degeneration. Moreover, the ribosomal hydroxylase OGFOD1 controls mRNA translation, which is known to decline with aging. 2-OGDO enzymes are the sensors of energy metabolism, since the Krebs cycle intermediate 2-oxoglutarate is an activator whereas succinate and fumarate are the potent inhibitors of 2-OGDO enzymes. In addition, O-2 availability and iron redox homeostasis control the activities of 2-OGDO enzymes in tissues. We will briefly elucidate the catalytic mechanisms of 2-OGDO enzymes and then review the potential functions of the above-mentioned 2-OGDO enzymes in the control of the aging process.
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