Expression, in vivo localization and phylogenetic analysis of a pyridoxine 5′-phosphate oxidase in Arabidopsis thaliana

► AtPPOX gene is regulated by abiotic stress and plant hormones. ► AtPPOX protein is localized in chloroplast. ► Two sizes of AtPPOX in root and shoot provide evidence for splice variants. ► RNAi mutant of AtPPOX are sensitive to high light intensity and high sucrose.