FunctionLipid transport protein in adipocytes. Binds both long chain fatty acids and retinoic acid. Delivers long-chain fatty acids and retinoic acid to their cognate receptors in the nucleus.
Sequence similaritiesBelongs to the calycin superfamily. Fatty-acid binding protein (FABP) family.
DomainForms a beta-barrel structure that accommodates hydrophobic ligands in its interior.
Cellular localizationCytoplasm. Nucleus. Depending on the nature of the ligand, a conformation change exposes a nuclear localization motif and the protein is transported into the nucleus. Subject to constitutive nuclear export.