ABA3 — Arabidopsis thaliana

Summary

AT1G16540, known as ABA3, encodes a molybdopterin cofactor sulfurase with cysteine desulfurase and selenocysteine lyase activities, belonging to the MoCo_sulfurase family. This gene is associated with abscisic acid biosynthesis, as well as responses to drought, osmotic stress, freezing, UV-B, and powdery mildew resistance. It is linked to traits including seed dormancy, stomatal closure, water loss, leaf water potential, photosynthetic rate, biomass yield, seed yield, root length, and lateral root development. The protein localizes to mitochondria and the cytoplasm and is involved in molybdenum cofactor sulfuration, iron-sulfur cluster assembly, and sulfur metabolism. Studies of related genes in other species link the family to drought tolerance, salt tolerance, abscisic acid accumulation, and seed yield.