The small protein ubiquitin is particularly famous for marking proteins for degradation but it has also been shown to regulate virtually all cellular processes. In parallel to the ubiquitin system various other ubiquitin-like modifiers have evolved, of which Fubi is particularly poorly studied despite its immunomodulatory activity.
Click here for original story, Getting protein factories to run—How deubiquitinating enzymes moonlight as Fubi proteases
Source: Phys.org