May function as a substrate adapter for CUL4-DDB1 E3 ubiquitin-protein ligase complex (Probable). Negative regulator of fatty acid biosynthetic process and accumulation (PubMed:28663238). Acts as an abscisic acid (ABA) negative regulator (PubMed:26147561). Involved in responses to salt (NaCl) and osmotic (e.g. in response to mannitol and PEG) stresses (PubMed:26147561). Protein modification; protein ubiquitination. Interacts with DDB1; the subcellular localization of this complex depends on farnesylation status (PubMed:26147561). Binds to HDA9 in the cytosol when farnesylated (PubMed:28663238). Excluded from the nucleus when farnesylated at Cys-754. Farnesylated at Cys-754 by FTB/ERA1; this modification triggers an exclusion from the nucleus. Production of 'obese' seeds characterized by increased weight, oil body density and higher fatty acid contents (PubMed:28663238). Increased sensitivity to abscisic acid (ABA) as well as salt (NaCl) and osmotic (e.g. in response to mannitol and PEG) stresses in term of seed germination and roots elongation (PubMed:26147561).