ULP1D (UB-LIKE PROTEASE 1D); SUMO-specific protease/ cysteine-type peptidase; Encodes a deSUMOylating enzyme. In vitro it has both peptidase activity and isopeptidase activity- it can cleave C-terminal residues from SUMO to activate it for attachment to a target protein and it can also act on the isopeptide bond between SUMO and another protein. sGFP-OTS1 protein accumulates in the nucleus. Double mutant analysis with ULP1C/OTS2 indicates that these genes are involved in salt stress responses and flowering time regulation. Over-expression of 35S-OTS1 increases salt tolerance and reduce [...] (584 aa)