Deubiquitinating enzymes and the proteasome regulate preferential sets of ubiquitin substrates

Deubiquitinases (DUBs) remove ubiquitin from its target proteins. Here, authors compare the regulatory effects of the proteasome and DUBs on the ubiquitinated proteome. They find preferential sets of substrates regulated by DUBs or by the proteasome. Moreover, they find that PARP1 is hyper-ubiquitinated in response to DUB inhibition, which increases its enzymatic activity.