Salicylic acid carboxyl methyltransferase

Originally isolated and characterized from the petals of Clarkia breweri, salicylic acid carboxyl methyltransferase (SAMT), converts salicylic acid to methylsalicylate.14 Methysalicylate, a volatile ester, has a characteristic wintergreen scent Apart from its putative role in defense, methylsalicylate is an important chemoattractant for moth-pollinated flowers and one of the main volatiles released from Clarkia breweri flowers.44,55 SAMT is a member of the type 3 family of plant MTs. Similarly to the previously discussed families of methyltransferases, type 3 MTs are homodimeric proteins. 

ROSS, J.R., NAM, K.H., D AURIA, J.C., PICHERSKY, E., S-Adenosyl-L-methionine salicylic acid carboxyl methyltransferase, an enzyme involved in floral scent production and plant defense, represents a new class of plant methyltransferases, Arch. Biochem. Biophys., 1999,367,9-16. 

BSMT benzoic acid/salicylic acid carboxyl methyltransferase... 

Fig. 22.7 Consensus effects of Spd and Spm on salicyclic acid metabolism and signaling cascade. Description is same as in legends to Fig. 22.1. GH3.5 GH3-like phytohormone amino acid synthetase, MeSA methyl salicylate, NPRl non-expressor of pathogenesis-related gene 1, NPR3 NPRl-like protein 3, NPR4 NPRl-like protein 4, SA sahcylic acid, SA-Asp Salicyloyl-L-aspartic acid, SAMT SAM-dependent carboxyl methyltransferase, TGA TGA transcription factor...

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