CYSK — Cucumis sativus

Summary

CsACS1 (CSA_5G589260) on cucumber chromosome 5 encodes a cysteine synthase family protein with Cys_synth and CysK domains, exhibiting cysteine synthase, pyrazolylalanine synthase, L-mimosine synthase, beta-pyrazolylalanine synthase, and L-3-cyanoalanine synthase activities (EC 2.5.1.47). The gene is associated with ethylene anabolism, fruit development, climacteric fruit ripening, nitrogen fixation, nodulation, alternative respiration, tetrapyrrole anabolism, cell redox homeostasis, signal transduction, double fertilization, pollen tube growth, and response to salt and oxidative stress. It is linked to net photosynthetic rate, photosynthetic rate, abiotic plant stress response trait, and sex expression. The protein localizes to the chloroplast stroma and cytoplasm and participates in cysteine biosynthesis and amino acid metabolism pathways. Studies of related genes in other species connect the family to peg formation and abiotic stress tolerance.