ACC4 — Lactuca sativa

Summary

LsACC4, encoded by the garden lettuce gene ACC4 on chromosome 3, is a pyridoxal phosphate-dependent aminotransferase with 1-aminocyclopropane-1-carboxylate synthase activity. It is associated with the regulation of ethylene biosynthesis, including its negative regulation, and with responses to organophosphorus, potassium ion starvation, and nitrogen starvation. The gene has been linked to numerous traits, including yield, leaf length, root hair length, lateral root number, root mass density, photosynthetic rate, respiration rate, fruit ripening, flowering time, anthocyanin content, and responses to bacterial disease, low temperature stress, and arsenic. It is also connected to phenotypes such as root growth, cell wall biosynthesis, seed mucilage structure, and auxin and ABA sensitivity. The product localizes to the plant-type cell wall, vacuole, plastid, plasmodesma, and other cellular compartments.