TSM1 — Cucumis sativus

Summary

CsTSM1 (CSA_7G073660) on cucumber chromosome 7 encodes a cation-dependent O-methyltransferase with S-adenosyl-L-methionine-dependent methyltransferase activity, classified as EC 2.1.1.104 and annotated with trihydroxyferuloyl spermidine O-methyltransferase, tricaffeoyl spermidine O-methyltransferase, and caffeoyl-CoA O-methyltransferase activities. The gene is associated with spermidine hydroxycinnamate conjugate biosynthesis, pigment accumulation, fruit development, wound healing, epidermal cell differentiation, phenylpropanoid and flavonoid metabolism, lignin and coumarin biosynthesis, circadian rhythm, and response to fungi. It is linked to transpiration rate and phenotypes including flavonoid methylation patterns, spermidine conjugate O-methylation, aquaporin methylation, oxidative stress and salt tolerance, drought tolerance, ABA signaling, and resistance to Ralstonia solanacearum. The protein localizes to the endomembrane system, cytosol, nucleus, endoplasmic reticulum, and plasma membrane. Studies of related genes in other species connect the family to pollen development, defense response, and xylem transport.