E3 ubiquitin-protein ligase involved in the positive regulation of abscisic acid (ABA) signaling and responses to salt and osmotic stresses during seed germination and early seedling development (PubMed:19286935, PubMed:21478367). Acts additively with RHA2B in regulating ABA signaling and drought response (PubMed:21478367). Possesses E3 ubiquitin ligase activity in vitro (PubMed:15644464, PubMed:19286935). 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 NAC019 and NAC055. Expressed in stems, flowers, cauline leaves, rosettes, siliques, seeds and roots. The ring domain is sufficient for the interaction with ANAC. Presence of both a nuclear localization sequence (NLS) and a nuclear export sequence (NES). Decreased sensitivity to ABA and salt and osmotic stresses during seed germination and early seedling development.