Species	Reference gene ID	Possible function	Papers / DOI
Arabidopsis	At2g21470	The dimeric enzyme acts as an E1 ligase for SUMO1 and SUMO2.	Genetic analysis of SUMOylation in Arabidopsis: conjugation of SUMO1 and SUMO2 to nuclear proteins is essential.; 2007; DOI: 10.1104/pp.107.102285; PMID: 17644626; https://pubmed.ncbi.nlm.nih.gov/17644626/