Like ubiquitin (see MIM 191339), ubiquitin-fold modifier-1 (UFM1; MIM 610553) must be processed by a protease before it can conjugate with its target proteins. UFSP2 is a thiol protease that specifically processes the C terminus of UFM1 (Kang et al., 2007 [PubMed 17182609]).[supplied by OMIM, Oct 2009]