Calcium-binding peroxygenase involved in the degradation of storage lipid in oil bodies. May be involved in the interaction between oil bodies and vacuoles during seed germination and in the oxylipin signaling pathways and plant defense responses. Can catalyze sulfoxidation of thiobenzamide, hydroxylation of aniline and epoxidation of oleic acid. RH + ROOH = ROH + ROH. Binds 1 heme b (iron(II)-protoporphyrin IX) group. Homodimer. Expressed in roots, cotyledons, hypocotyls, leaves, shoots, flowers, siliques and dry seeds. Down-regulated by light and upon germination. Not induced by abscisic acid or osmotic stress. Transmembrane regions are predicted by sequence analysis tools, but these regions probably constitute hydrophobic domains associated to phospholipids. The proline-knot motif (117-126) may be involved in targeting to lipid bodies. Belongs to the caleosin family.