ID 2.1.1.318 DE [trehalose-6-phosphate synthase]-L-cysteine S-methyltransferase. CA [trehalose-6-phosphate synthase]-L-cysteine + S-adenosyl-L-methionine = CA [trehalose-6-phosphate synthase]-S-methyl-L-cysteine + H(+) + S-adenosyl- CA L-homocysteine. CC -!- The enzyme, characterized from the yeast Saccharomyces cerevisiae, CC enhances the activity of EC 2.4.1.15 resulting in elevating the CC levels of trehalose in the cell and contributing to stationary phase CC survival. CC -!- In vitro the enzyme performs S-methylation of L-cysteine residues of CC various protein substrates. DR I6WHP7, CMT_YEASX ; //