PPX — Triticum aestivum

Summary

TRAESCS5D02G055700, also known as PPX, PPO1 or TaPPO1-5D, encodes a protoporphyrinogen oxidase (EC 1.3.3.4) with oxygen-dependent protoporphyrinogen oxidase activity, FAD/NAD-binding and amine oxidase domains, and is associated with redox activity, protein dimerization, and co-ion binding. This bread wheat gene on chromosome 5D is linked to flour color, pericarp and seed coat color, grain length and weight, stripe rust response, chlorophyll content, and root morphology. It is also associated with grain flour browning, embryo viability, seed set, pollen development, reactive oxygen species accumulation, and mitochondrial and chloroplast RNA editing. The product localizes to plastid thylakoid and mitochondrial inner membranes, chloroplast envelope and stroma, and is associated with tetrapyrrole biosynthesis, aromatic amino acid metabolism, and vitamin metabolism. Studies of related genes in other species link the family to herbicide sensitivity, drought tolerance, grain yield, and seedling viability.