OTU1 is a deubiquitinating enzyme that may play an important regulatory role at the level of protein turnover by preventing degradation. This entry represents the ubiquitin regulatory X-like (UBXL) which interacts with the N-terminal domain of VCP [1] and removes ubiquitin chains using the OTU domain. This domain is also found in VCIP1, a known UBXL-containing protein that functions in p97/p47-mediated Golgi reassembly.

1: Structural basis for ovarian tumor domain-containing protein 1 (OTU1) binding to p97/valosin-containing protein (VCP). Kim SJ, Cho J, Song EJ, Kim SJ, Kim HM, Lee KE, Suh SW, Kim EE; J Biol Chem. 2014;289:12264-12274. PMID:24610782

2: Cell cycle regulation of VCIP135 deubiquitinase activity and function in p97/p47-mediated Golgi reassembly. Zhang X, Wang Y; Mol Biol Cell. 2015;26:2242-2251. PMID:25904330