E3 ubiquitin protein ligase that regulates leaf senescence through ubiquitination and subsequent degradation of WRKY53. S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine. Protein modification; protein ubiquitination. Interacts with WRKY53. By jasmonate. Down-regulated by hydrogen peroxide. Accelerated senescence. Belongs to the UPL family.