Both quality control and pace of production of proteins in cells are linked to aging. When comparing species and lineages with different life spans, long-lived mutants of short-lived species such as nematode worms exhibit a slower rate of protein synthesis. The same is true in yeast. Equally, the long-lived naked mole-rat exhibits highly efficient quality control in protein synthesis when compared to short-lived rodent species of a similar size. It is also the case that for any given individual, the quality control of protein synthesis becomes worse with age, and this – like stochastic mutation of DNA, and for similar reasons – is thought to be a contributing factor in the progression of degenerative aging. That said, where exactly it sits in the long chains of cause and effect between first cause of aging and final downstream outcome of aging is up for debate.
Aging is characterized by the accumulation of various forms of damage as well as by other age-related deleterious changes. These changes generally have negative, deleterious consequences for organisms as they age. Different living systems differ in their metabolic strategies,
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