Ulp1 protease family protein. similar to ESD4 (EARLY IN SHORT DAYS 4), cysteine-type peptidase [Arabidopsis thaliana] (TAIR:AT4G15880.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO70965.1); contains InterPro domain Peptidase C48, SUMO/Sentrin/Ubl1; (InterPro:IPR003653)