ABC transporter that may affect phytic acid transport and compartmentalization. May function directly or indirectly in removing phytic acid from the cytosol or in vesicle trafficking. Required for phytic acid accumulation in developing seeds. Phytic acid is the primary storage form of phosphorus in cereal grains and other plant seeds. Expressed in roots, leaf sheaths, leaf blades and developing seeds. Strong reduction in seed phytic acid, and strong increase of inorganic phosphate and myo-inositol levels in seeds. Seedling lethality when homozygous. Belongs to the ABC transporter superfamily. ABCC family. Conjugate transporter (TC 3.A.1.208) subfamily.