ACC4 — Cucumis sativus

Summary

CSA_6G496450 (ACC4, also known as ACS1, ACS11, CsACC4, CsETO3, CsETO2, CsACS8, ETO2, CIN5, CsACS5, ETO3, CsACS4) on cucumber chromosome 6 encodes a 1-aminocyclopropane-1-carboxylate synthase, an enzyme with pyridoxal phosphate binding and transaminase activity that catalyzes the committed step in ethylene biosynthesis from methionine. This gene is associated with female sex determination, unisexual flower development, and sex differentiation in cucumber. It is linked to a wide range of traits including fruit ripening, fruit shape and size, yield, leaf growth, shoot system development, root growth and morphology, photosynthetic rate, stomatal function, stress responses, and heterosis. The gene product localizes to multiple cellular compartments including the cytosol, plastid, mitochondria, and plasmalemma. Studies of related genes in other species connect the ACS family to sex determination, ethylene responses, and stress tolerance.