Botryococcene C-methyltransferase

Botryococcene C-methyltransferase (, TMT-3) is an enzyme with systematic name S-adenosyl-L-methionine:botryococcene C-methyltransferase.

Function
This enzyme catalyses the following chemical reaction:


 * 2 S-adenosyl-L-methionine + C30 botryococcene $$\rightleftharpoons$$ 2 S-adenosyl-L-homocysteine + 3,20-dimethyl-1,2,21,22-tetradehydro-2,3,20,21-tetrahydrobotryococcene (overall reaction)
 * (1a) S-adenosyl-L-methionine + C30 botryococcene $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3-methyl-1,2-didehydro-2,3-dihydrobotryococcene
 * (1b) S-adenosyl-L-methionine + 3-methyl-1,2-didehydro-2,3-dihydrobotryococcene $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3,20-dimethyl-1,2,21,22-tetradehydro-2,3,20,21-tetrahydrobotryococcene
 * (2a) S-adenosyl-L-methionine + C30 botryococcene $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 20-methyl-21,22-didehydro-20,21-dihydrobotryococcene
 * (2b) S-adenosyl-L-methionine + 20-methyl-21,22-didehydro-20,21-dihydrobotryococcene $$\rightleftharpoons$$ S-adenosyl-L-homocysteine + 3,20-dimethyl-1,2,21,22-tetradehydro-2,3,20,21-tetrahydrobotryococcene

This enzyme is isolated from the green alga Botryococcus braunii BOT22.