Defining changes in the steady-state levels of ubiquitinated peptides in aging and longevity

We performed diGLY enrichment followed by label-free proteomics in C. elegans to define and quantify changes in the ubiquitinated (Ub)-proteome during the aging process. More specifically, we compared wild-type worms at the first day of adulthood with young (day 5), mid-age (day 10) and aged adults (day 15). Moreover, we assessed the Ub-modified proteome of age-matched long-lived genetic models of dietary restriction (eat-2(ad1116)) and reduced reduced insulin/IGF-1 signaling (daf-2(e1370)).