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 (By similarity). Acts as a negative regulator of abscisic acid responses in non-seed tissues. RH + ROOH = ROH + ROH. Binds 1 heme b (iron(II)-protoporphyrin IX) group. Homodimer. Expressed in roots, leaves, stems, shoots, flowers and germinated seeds. Barely detected in dry seeds prior to germination. Preferentially expressed in vascular bundles and in guard cells. Down-regulated by abscisic acid and high salt. Not induced by salt stress or desiccation. Transmembrane regions are predicted by sequence analysis tools, but these regions probably constitute hydrophobic domains associated to phospholipids. The proline-knot motif (70-79) may be involved in targeting to lipid bodies. No visible phenotype, but increased sensitivity to exogenous abscisic acid and osmotic stresses. Increased drought tolerance. Belongs to the caleosin family.