Probable E3 ubiquitin ligase acting as a positive post-transcriptional regulator of 3-hydroxy-3-methylglutaryl-coenzyme A reductase activity. Might be involved in the quality control that degrades misfolded proteins (By similarity). 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. Expressed in cotyledons, leaves, roots, stems, inflorescences and siliques. Expression higher at the top than at the base of the stem. Constitutively expressed throughout development. The RING-CH-type zinc finger domain is required for E3 ligase activity. Semiglossy stem. Elevated drought tolerance and reduced transpiration rate. Elevated amounts of 18-carbon-length cutin monomers and shift in the cuticular wax profile toward the very-long-chain free fatty acids tetracosanoic acid (C24) and hexacosanoic acid (C26).