3ong is a 4 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
UBA2_YEAST The dimeric enzyme acts as a SMT3 E1 ligase. It mediates ATP-dependent activation of SMT3 and formation of a thioester with a conserved cysteine residue on AOS1.