ACS1 — Solanum lycopersicum

Summary

SlACS1 (SOLYC08G081550.4) encodes a 1-aminocyclopropane-1-carboxylate synthase, a pyridoxal phosphate-dependent enzyme that also exhibits transaminase, protein phosphatase, and calcium ion binding activities. This tomato gene on chromosome 8 is associated with fruit ripening, ACC accumulation, and ethylene biosynthesis, as well as with lycopene and carotenoid content, pigmentation, and chlorophyll breakdown. It has been linked to fruit firmness, color, and shape, seed yield and maturation, germination rate, vegetative vigor, leaf growth and longevity, shoot branching, root development, and responses to waterlogging, salt, cadmium, hypoxia, nitrogen deficiency, and pathogens including Verticillium wilt and Pseudomonas syringae. Additional associations include strigolactone and abscisic acid anabolism, auxin homeostasis, sucrose transport, and cellular responses to nutrient starvation. The protein localizes to plastids, mitochondria, the cytosol, plasmalemma, and plasmodesmata.